30 CFR 250.468 - What well records am I required to submit?

Code of Federal Regulations, 2012 CFR

2012-07-01

... THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Applying for A Permit to Modify and Well Records § 250.468 What well records am I... surveys. (b) For drilling operations in the GOM OCS Region, you must submit form BSEE-0133, Well Activity...

78 FR 21969 - Gulf of Mexico (GOM), Outer Continental Shelf (OCS), Western Planning Area (WPA) Lease Sale 233...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-04-12

... while ensuring availability of the document to the public, BOEM will primarily distribute digital copies... copies of the Final Supplemental EIS to several libraries along the Gulf Coast. To find out which libraries have copies of the Final Supplemental EIS for review, you may contact BOEM's Public Information...

77 FR 2991 - Gulf of Mexico (GOM), Outer Continental Shelf (OCS), Central Planning Area (CPA), Oil and Gas...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-01-20

... circumstances and information arising from, among other things, the Deepwater Horizon event. This Final... Supplemental EIS) is available at BOEM's Internet Web site at http://www.boem.gov/Environmental-Stewardship... visit BOEM's Internet Web site at http://www.gomr.boem.gov/homepg/regulate/environ/libraries.html . FOR...

30 CFR 203.2 - How can I obtain royalty relief?

Code of Federal Regulations, 2011 CFR

2011-07-01

... 30 Mineral Resources 2 2011-07-01 2011-07-01 false How can I obtain royalty relief? 203.2 Section....2 How can I obtain royalty relief? We may reduce or suspend royalties for Outer Continental Shelf... production. (See §§ 203.50 through 203.56.) (b) Located in a designated GOM deep water area (i.e., 200 meters...

77 FR 29682 - Gulf of Mexico, Outer Continental Shelf, Central Planning Area, Oil and Gas Lease Sale 216/222

Federal Register 2010, 2011, 2012, 2013, 2014

2012-05-18

... and Gas Lease Sale: 2012 Central Planning Area (CPA) Lease Sale 216/222 Authority: This NOA is... a ROD following the completion of the Final SEIS for CPA Consolidated Lease Sale 216/222, the final... SEIS updates two previous environmental and socioeconomic analyses for CPA Lease Sale 216/222. The GOM...

76 FR 70473 - Outer Continental Shelf (OCS) Western Planning Area (WPA) Gulf of Mexico (GOM) Oil and Gas Lease...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-11-14

... period of the lease term for blocks in water depths of 400 meters to less than 1,600 meters, (2) the minimum bonus bid has increased for blocks in water depths of 400 meters or deeper, (3) no deepwater... meters and (2) 400 meters or more. Successful Bidders: The BOEM requires each company that has been...

77 FR 65408 - Outer Continental Shelf (OCS) Western Planning Area (WPA) Gulf of Mexico (GOM) Oil and Gas Lease...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-10-26

... leases in depths less than 400 meters with an initial period longer than 5 years, royalty rates, minimum... $25.00 per acre or fraction thereof for blocks in water depths of less than 400 meters. $100.00 per acre or fraction thereof for blocks in water depths of 400 meters or deeper. Rental Rates Annual rental...

77 FR 41448 - Notice of Availability of the Proposed Final Five Year Outer Continental Shelf (OCS) Oil and Gas...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-07-13

... President and Congress. After a period of at least 60 days from the date it was submitted to the President... (3 areas off Alaska and 3 areas in the Gulf of Mexico (GOM)). Maps A and B show the areas proposed... not under congressional moratorium pursuant to the Gulf of Mexico Energy Security Act of 2006 (GOMESA...

75 FR 6874 - Outer Continental Shelf (OCS) Central Planning Area (CPA) Gulf of Mexico (GOM) Oil and Gas Lease...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-02-12

... for blocks in water depths of 400 meters to less than 1,600 meters. Blocks in 400 to less than 800... resulting from this lease sale. Leases in water depths of 400 meters to less than 800 meters will be offered... still may require the full 10-year term. In both the 400-800 and 800-1,600 meter cases, the lease...

Review of pre-rift continental fits and plate kinematic models for the Gulf of Mexico opening

NASA Astrophysics Data System (ADS)

Steier, A.; Mann, P.

2016-12-01

We review models for the opening of the Gulf of Mexico (GOM) by: 1) subdividing them into historical groupings; 2) demonstrating their strengths and weaknesses using GPlates; and 3) illustrating the compatibility of models for GOM opening with the surrounding plate mosaic in the Central Atlantic and Caribbean. Tectonic models for GOM opening during the 1970's and 1980's disagreed on whether the Yucatan continental block originated inside or outside the GOM, but difficulties in filling the continental underlap in reconstructions of pre-rift Pangea eventually led to a consensus that the Yucatan block originated inside the GOM. The 1980's saw the advent of the "piggyback model" for GOM evolution based on the assumption that the Jurassic opening of the GOM formed a southwestward extension of the Central Atlantic spreading system and opened about its same pole of rotation. This single-phase model eventually fell out of favor as refraction surveys determined that the existence of a wedge-shaped area of oceanic crust in the deep GOM (widening from east to west) was not compatible with the single, NW-SE opening direction proposed by the piggyback model. The early 2000's saw the appearance of a two-phase opening model as a solution to the existence of a broad zone of NW-SE continental extension in the northern GOM that was succeeded by a more NS-directed phase of extension that in some areas cut at right angles across structures produced during the first rift phase. The second phase of late Jurassic rifting and oceanic crust formation is the outcome of counterclockwise rotation of the Yucatan block that is thought to have been caused by forces acting on the edges of the block. By the earliest Cretaceous rifting in the GOM has ended although tectonic events in Mexico and the northern Caribbean reactivate and influence GOM sedimentation. We provide a GPlates restoration from Triassic to Recent that takes into account all available geologic and geophysical data and illustrates the two-phase GOM opening model which appears to be the tectonic model that can explain the most geologic and geophysical datasets from the Caribbean.

Rifting and Subsidence in the Gulf of Mexico: Implications for Syn-rift, Sag, and Salt Sections, and Subsequent Paleogeography

NASA Astrophysics Data System (ADS)

Pindell, J. L.; Graham, R.; Horn, B.

2013-05-01

Thick (up to 5 km), rapid (<3 Ma), salt deposition is problematic for basin modelling because such accommodation cannot be thermal, yet GoM salt deposits (Late Callovian-Early Oxfordian) appear to be post-rift (most salt overlies planar sub-salt unconformities on syn-rift section). One possible solution is that the pre-drift GoM was a deep (~2 km) air-filled rift depression where basement had already subsided tectonically, and thus could receive up to 5 km of salt, roughly the isostatic maximum on exhumed mantle, hyper-thinned continent, or new ocean crust. ION-GXT and other seismic data along W Florida and NW Yucatán show that (1) mother salt was only 1 km thick in these areas, (2) that these areas were depositionally connected to areas of thicker deposition, and (3) the top of all salt was at global sea level, and hence the sub-salt unconformity along Florida and Yucatán was only 1 km deep by end of salt deposition. These observations fit the air-filled chasm hypothesis; however, two further observations make that mechanism highly improbable: (1) basinward limits of sub-salt unconformities along Florida/Yucatán are deeper than top of adjacent ocean crust emplaced at ~2.7 km subsea (shown by backstripping), and (2) deepest abyssal sediments over ocean crust onlap the top of distal salt, demonstrating that the salt itself was rapidly drowned after deposition. Study of global ION datasets demonstrates the process of "rapid outer marginal collapse" at most margins, which we believe is achieved by low-angle detachment on deep, landward-dipping, Moho-equivalent surfaces such that outer rifted margins are hanging walls of crustal scale half-grabens over mantle. The tectonic accommodation space produced (up to 3 km, < 3 Ma) can be filled by ~5 km of sag/salt sequences with little apparent hanging wall rifting. When salt (or other) deposition lags behind, or ends during, outer marginal collapse, deep-water settings result. We suggest that this newly identified, "outer marginal detachment phase", normally separates the traditional "rift" from "drift" stages during continental margin creation. Importantly, this 2-3 km of subsidence presently is neither treated as tectonic nor as thermal in traditional subsidence analysis; thus, Beta estimates may be excessive at many outer margins. Outer marginal collapse was probably eastwardly diachronous with initiation of spreading in the GoM. Additionally, recent paleo-climate studies suggest humid Early/Middle Jurassic conditions in equatorial GoM, hindering air-filled chasm development, but North America's northward flight into middle latitudes initiated Callovian aridity.

Growth in conventional fields in high-cost areas: a case study

USGS Publications Warehouse

Attanasi, E.D.

2000-01-01

Exploration managers commonly base future drilling decisions on past experience in an area. To do this well, they should consider both discovered and undiscovered resources to characterize total future potential. Discovery-size estimates should be adjusted to account for future field growth; otherwise, the relative efficiency of recent exploration will be undervalued. This study models and projects field growth for pre-1997 discoveries in the U.S. Federal Gulf of Mexico (GOM) Outer Continental Shelf (OCS). Projected additions to reserves for these fields from field growth through 2020 are 5.2 billion bbl of oil and 46 Tcfg. Projections include growth associated with sizable new oil discoveries in deepwater areas and initial reserve additions from new subsalt plays discovered through 1996. This article focuses on the U.S. GOM because it has produced longer than other worldwide offshore areas. Its field-growth profile may be prototypical of other offshore provinces such as the North Sea, Scotian Shelf and deepwater Angola, as well as high-cost onshore areas.

Current understanding of the driving mechanisms for spatiotemporal variations of atmospheric speciated mercury: a review

NASA Astrophysics Data System (ADS)

Mao, Huiting; Cheng, Irene; Zhang, Leiming

2016-10-01

Atmospheric mercury (Hg) is a global pollutant and thought to be the main source of mercury in oceanic and remote terrestrial systems, where it becomes methylated and bioavailable; hence, atmospheric mercury pollution has global consequences for both human and ecosystem health. Understanding of spatial and temporal variations of atmospheric speciated mercury can advance our knowledge of mercury cycling in various environments. This review summarized spatiotemporal variations of total gaseous mercury or gaseous elemental mercury (TGM/GEM), gaseous oxidized mercury (GOM), and particulate-bound mercury (PBM) in various environments including oceans, continents, high elevation, the free troposphere, and low to high latitudes. In the marine boundary layer (MBL), the oxidation of GEM was generally thought to drive the diurnal and seasonal variations of TGM/GEM and GOM in most oceanic regions, leading to lower GEM and higher GOM from noon to afternoon and higher GEM during winter and higher GOM during spring-summer. At continental sites, the driving mechanisms of TGM/GEM diurnal patterns included surface and local emissions, boundary layer dynamics, GEM oxidation, and for high-elevation sites mountain-valley winds, while oxidation of GEM and entrainment of free tropospheric air appeared to control the diurnal patterns of GOM. No pronounced diurnal variation was found for Tekran measured PBM at MBL and continental sites. Seasonal variations in TGM/GEM at continental sites were attributed to increased winter combustion and summertime surface emissions, and monsoons in Asia, while those in GOM were controlled by GEM oxidation, free tropospheric transport, anthropogenic emissions, and wet deposition. Increased PBM at continental sites during winter was primarily due to local/regional coal and wood combustion emissions. Long-term TGM measurements from the MBL and continental sites indicated an overall declining trend. Limited measurements suggested TGM/GEM increasing from the Southern Hemisphere (SH) to the Northern Hemisphere (NH) due largely to the vast majority of mercury emissions in the NH, and the latitudinal gradient was insignificant in summer probably as a result of stronger meridional mixing. Aircraft measurements showed no significant vertical variation in GEM over the field campaign regions; however, depletion of GEM was observed in stratospherically influenced air masses. In examining the remaining questions and issues, recommendations for future research needs were provided, and among them is the most imminent need for GOM speciation measurements and fundamental understanding of multiphase redox kinetics.

Trends in summer bottom-water temperatures on the northern Gulf of Mexico continental shelf from 1985 to 2015.

PubMed

Turner, R Eugene; Rabalais, Nancy N; Justić, Dubravko

2017-01-01

We quantified trends in the 1985 to 2015 summer bottom-water temperature on the northern Gulf of Mexico (nGOM) continental shelf for data collected at 88 stations with depths ranging from 3 to 63 m. The analysis was supplemented with monthly data collected from 1963 to 1965 in the same area. The seasonal summer peak in average bottom-water temperature varied concurrently with air temperature, but with a 2- to 5-month lag. The summer bottom-water temperature declined gradually with depth from 30 oC at stations closest to the shore, to 20 oC at the offshore edge of the study area, and increased an average 0.051 oC y-1 between1963 and 2015. The bottom-water warming in summer for all stations was 1.9 times faster compared to the rise in local summer air temperatures, and 6.4 times faster than the concurrent increase in annual global ocean sea surface temperatures. The annual rise in average summer bottom-water temperatures on the subtropical nGOM continental shelf is comparable to the few published temperature trend estimates from colder environments. These recent changes in the heat storage on the nGOM continental shelf will affect oxygen and carbon cycling, spatial distribution of fish and shrimp, and overall species diversity.

Stable Carbon Isotope Composition of Remineralizing Organic Matter in the Northern Gulf of Mexico Continental Shelf

NASA Astrophysics Data System (ADS)

Hu, X.; Wang, H.; Rabalais, N. N.

2016-02-01

Despite years of study, whether water column or benthic respiration controls oxygen consumption in the seasonally hypoxic Northern Gulf of Mexico (nGOM) waters remains contentious. Elucidating this control is essential for long-term nutrient management purposes. In this study, we examined stable carbon isotope composition (δ13C) of organic matter that was remineralized in subsurface water of the nGOM continental shelf using both shipboard incubations (water and sediment) and a three-endmember mixing model. Based on our 2014 data, sediment and water incubations yielded disparate δ13C signatures in the respiration produced CO2, with the sediment incubation generating substantially more 13C-enriched CO2 (-16 -21‰ in sediment vs. -27 -29‰ in water), though water column bulk particulate organic matter (POM) had δ13C ranging from -23‰ to -25‰. However, from the three-endmember mixing model, our calculated CO2-δ13C due to respiration in the entire surveyed nGOM shelf was -18.5‰. This value was consistent with the results obtained in previous annual shelfwide cruises (-17.2 -19.5‰). The close agreement between respirational CO2-δ13C from the mixing model and that from sediment incubation suggests that benthic process likely played a dominant role in subsurface respiration in the nGOM shelf. This result also indicates that hydrocarbon remineralization was likely insignificant on the ecosystem level after the 2010 Deepwater Horizon oil spill.

Cold-seep carbonates of the middle and lower continental slope, northern Gulf of Mexico

NASA Astrophysics Data System (ADS)

Roberts, Harry H.; Feng, Dong; Joye, Samantha B.

2010-11-01

Authigenic carbonates from cold seeps on the middle and lower continental slope of the northern Gulf of Mexico (GOM) exhibit a wide range of mineralogical and stable isotopic compositions. These carbonates consist of concretions and nodules in surface sediments, hardgrounds of crusts and isolated slabs, and mounded buildups of blocks and slabs of up to over 10 meters in relief above the surrounding seafloor. Mineralogically, the carbonates are dominated by high-Mg calcite (HMC) and aragonite. However, low levels (<5 wt%) of dolomite are present in most samples. Petrographically, Mg-calcite peloidal matrix and acicular to botryoidal aragonitic void-filling cements are the most frequent associations. The carbon isotopic compositions of the carbonates range from -60.8 to 14.0‰ PDB, indicating complex carbon sources that include 13C-depleted biogenic and thermogenic methane, biodegraded crude oil, seawater CO2, and 13C-enriched residual CO2 from methanogenesis. A similarly large variability in δ18O values (2.5 to 6.7‰ PDB) demonstrates the geochemical complexity of the slope, with some samples pointing toward an 18O-enriched oxygen source that is possibly related to advection of 18O-enriched formation water and/or to the decomposition of gas hydrate. A considerable range of mineralogical and isotopic variations in cold-seep carbonate composition was noted even within individual study sites. However, common trends occur across multiple geographic areas. This situation suggests that local controls on fluid and gas flux, types of seep hydrocarbons, the presence or absence of gas hydrate in the near-surface sediment, and chemosynthetic communities, as well as the temporal evolution of the local hydrocarbon reservoir, all may play a part in determining carbonate mineralogy and isotope geochemistry. The carbon isotope data clearly indicate that between-site variation is greater than within-site variation. Seep carbonates formed on the middle and lower continental slope of the GOM do not appear to be substantially different from those found on the upper slope (<1000-m water depth). The highly variable fluids and gases that leave their geochemical imprints on seep carbonate of the middle and lower continental slope are similar to their outer shelf and upper slope counterparts.

Stable isotopes provide new insights into vestimentiferan physiological ecology at Gulf of Mexico cold seeps.

PubMed

Becker, Erin Leigh; Macko, Stephen A; Lee, Raymond W; Fisher, Charles R

2011-02-01

On the otherwise low-biomass seafloor of the Gulf of Mexico (GoM) continental slope, natural oil and gas seeps are oases of local primary production that support lush animal communities. Hundreds of seep communities have been documented on the continental slope, and nutrition derived from seeps could be an important link in the overall GoM food web. Here, we present a uniquely large and cohesive data set of δ(13)C, δ(15)N, and δ(34)S compositions of the vestimentiferan tubeworms Escarpia laminata and Lamellibrachia sp. 1, which dominate biomass at GoM seeps and provide habitat for hundreds of other species. Our sampling design encompassed an entire region of the GoM lower slope, allowing us for the first time to assess spatial variability in isotope compositions and to robustly address long-standing hypotheses about how vestimentiferans acquire and cycle nutrients over their long lifespan (200+ years). Tissue δ(13)C values provided strong evidence that larger adult vestimentiferans use their buried roots to take up dissolved inorganic carbon from sediment pore water, while very small individuals use their plume to take up carbon dioxide from the seawater. δ(34)S values were extremely variable among individuals of the same species within one location (<1 m(2) area), indicating high variability in the inorganic sulfur pools on a very small spatial scale. This finding supports the hypothesis that vestimentiferans use their roots to cycle sulfate and sulfide between their symbionts and free-living consortia of sulfate-reducing archaea in the sediment. Finally, consistent differences in δ(15)N between two cooccurring vestimentiferan species provided the first strong evidence for partitioning of inorganic resources, which has significant implications for the ecology and evolution of this taxonomic group.

Stable isotopes provide new insights into vestimentiferan physiological ecology at Gulf of Mexico cold seeps

NASA Astrophysics Data System (ADS)

Becker, Erin Leigh; Macko, Stephen A.; Lee, Raymond W.; Fisher, Charles R.

2011-02-01

On the otherwise low-biomass seafloor of the Gulf of Mexico (GoM) continental slope, natural oil and gas seeps are oases of local primary production that support lush animal communities. Hundreds of seep communities have been documented on the continental slope, and nutrition derived from seeps could be an important link in the overall GoM food web. Here, we present a uniquely large and cohesive data set of δ13C, δ15N, and δ34S compositions of the vestimentiferan tubeworms Escarpia laminata and Lamellibrachia sp. 1, which dominate biomass at GoM seeps and provide habitat for hundreds of other species. Our sampling design encompassed an entire region of the GoM lower slope, allowing us for the first time to assess spatial variability in isotope compositions and to robustly address long-standing hypotheses about how vestimentiferans acquire and cycle nutrients over their long lifespan (200+ years). Tissue δ13C values provided strong evidence that larger adult vestimentiferans use their buried roots to take up dissolved inorganic carbon from sediment pore water, while very small individuals use their plume to take up carbon dioxide from the seawater. δ34S values were extremely variable among individuals of the same species within one location (<1 m2 area), indicating high variability in the inorganic sulfur pools on a very small spatial scale. This finding supports the hypothesis that vestimentiferans use their roots to cycle sulfate and sulfide between their symbionts and free-living consortia of sulfate-reducing archaea in the sediment. Finally, consistent differences in δ15N between two cooccurring vestimentiferan species provided the first strong evidence for partitioning of inorganic resources, which has significant implications for the ecology and evolution of this taxonomic group.

From DNS to RANS: A Multi-model workflow to understand the Influence of Hurricanes on Generating Turbidity Currents in the Gulf of Mexico

NASA Astrophysics Data System (ADS)

Syvitski, J. P.; Arango, H.; Harris, C. K.; Meiburg, E. H.; Jenkins, C. J.; Auad, G.; Hutton, E.; Kniskern, T. A.; Radhakrishnan, S.

2016-12-01

A loosely coupled numerical workflow is developed to address land-sea pathways for sediment routing from terrestrial and coastal sources, across the continental shelf and ultimately down the continental slope canyon system of the northern Gulf of Mexico (GOM). Model simulations represent a range of environmental conditions that might lead to the generation of turbidity-currents. The workflow comprises: 1) A simulator for the water and sediment discharged from rivers into the GOM with WMBsedv2 with calibration using USGS and USACE gauged river data; 2) Domain grids and bathymetry (ETOPO2) for the ocean models and realistic seabed sediment texture grids (dbSEABED) for the sediment transport models; 3) A spectral wave action simulator (10 km resolution) (WaveWatch III) driven by GFDL - GFS winds; 4) A simulator for ocean dynamics (ROMS) forced with ECMWF ERA winds; 5) A simulator for seafloor resuspension and transport (CSTMS); 6) Simulators (HurriSlip) of seafloor failure and flow ignition locations for boundary input to a turbidity current model; and 7) A RANS turbidity current model (TURBINS) to route sediment flows down GOM canyons, providing estimates of bottom shear stresses. TURBINS was developed first as a DNS model and then converted to an LES model wherein a dynamic turbulence closure scheme was employed. Like most DNS to LES model comparisons (these being done by the UCSB team), turbulence scaling allowed for higher Re applications but were found still not capable of simulating field scale (GOM continental canyons) environments. The LES model was next converted to a non-hydrostatic RANS model capable of field scale applications but only with a daisy-chain approach to multiple model runs along the simulated canyon floor. These model adaptations allowed the workflow to be tested for the year 1-Oct-2007 to 30-Sep-2008 that included two domain Hurricanes (Ike and Gustav). The RANS-TURBINS employed further boundary simplifications on both sediment erosion and deposition in line with the ocean model ROMS-CSTMS.

Hypoxia Hotspots in the Mississippi Bight

DTIC Science & Technology

2006-04-01

settings (see Sen Gupta and Machain- Pyrite framboid size and size distribution have been used Castillo , 1993, and references therein; Grantham and as...today/lASNFS-gom.html#msb. (eds.), Modem and Ancient Continental Shelf Anoxia: Geological NELSEN, T. A., BLACKWELDER, P., HOOD, T., MCKEE, B., ROMER , N

76 FR 2919 - Outer Continental Shelf Official Protraction Diagram and Supplemental Official Outer Continental...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-01-18

...: Availability of Revised North American Datum of 1983 (NAD 83) Outer Continental Shelf Official Protraction... that effective with this publication, the following NAD 83-based Outer Continental Shelf (OCS) Official...

Movements of Atlantic Sturgeon of the Gulf of Maine inside and outside the geographically defined Distinct Population Segment

USGS Publications Warehouse

Wippelhauser, Gail S.; Sulikowski, James; Zydlewski, Gayle B.; Altenritter, Megan; Kieffer, Micah; Kinnison, Michael T.

2017-01-01

Identification of potential critical habitat, seasonal distributions, and movements within and between river systems is important for protecting the Gulf of Maine (GOM) Distinct Population Segment of Atlantic Sturgeon. To accomplish these objectives, we captured Atlantic Sturgeon in four GOM rivers (Penobscot, Kennebec system, Saco, and Merrimack), and tagged 144 (83.3–217.4 cm TL) internally with uniquely coded acoustic transmitters. Tagged fish were detected between 2006 to 2014 by primary receiver arrays deployed in the four GOM rivers or opportunistically on a secondary group of receivers deployed within the GOM and along the continental shelf. Atlantic Sturgeon tagged in the four rivers were documented at three spawning areas in the Kennebec system in June and July, including one that became accessible in 1999 when the Edwards Dam was removed. After being tagged, the majority (74%) of Atlantic sturgeon were detected in the estuaries of the four GOM rivers, primarily from May through October. Tagged fish spent most of their time in saline water in the Saco River and Merrimack River, moved into brackish water in the Penobscot River, and were found in saline, brackish, and fresh water in the Kennebec system. Approximately 70% of the tagged fish were detected in GOM coastal waters, and aggregated in the Bay of Fundy (May–January), offshore of the Penobscot River (September-February and May), offshore of the Kennebec River (September–February), in Saco Bay and the Scarborough River (July–November), and along the eastern Massachusetts coast between Cape Ann and Cape Cod (April–February). Nine tagged Atlantic sturgeon (7%) left the GOM, three of which moved as far north as Halifax in Canada and six moved as far south as the James River in Virginia. Information from this study will be used to make recommendations to avoid, reduce or mitigate the impacts of in-water projects and on Atlantic sturgeon.

Decadal Changes in Zooplankton of the Northeast U.S. Continental Shelf

PubMed Central

Bi, Hongsheng; Ji, Rubao; Liu, Hui; Jo, Young-Heon; Hare, Jonathan A.

2014-01-01

The abundance of the subarctic copepod, Calanus finmarchicus, and temperate, shelf copepod, Centropages typicus, was estimated from samples collected bi-monthly over the Northeast U.S. continental shelf (NEUS) from 1977–2010. Latitudinal variation in long term trends and seasonal patterns for the two copepod species were examined for four sub-regions: the Gulf of Maine (GOM), Georges Bank (GB), Southern New England (SNE), and Mid-Atlantic Bight (MAB). Results suggested that there was significant difference in long term variation between northern region (GOM and GB), and the MAB for both species. C. finmarchicus generally peaked in May – June throughout the entire study region and Cen. typicus had a more complex seasonal pattern. Time series analysis revealed that the peak time for Cen. typicus switched from November – December to January - March after 1985 in the MAB. The long term abundance of C. finmarchicus showed more fluctuation in the MAB than the GOM and GB, whereas the long term abundance of Cen. typicus was more variable in the GB than other sub-regions. Alongshore transport was significantly correlated with the abundance of C. finmarchicus, i.e., more water from north, higher abundance for C. finmarchicus. The abundance of Cen. typicus showed positive relationship with the Gulf Stream north wall index (GSNWI) in the GOM and GB, but the GSNWI only explained 12–15% of variation in Cen. typicus abundance. In general, the alongshore current was negatively correlated with the GSNWI, suggesting that Cen. typicus is more abundant when advection from the north is less. However, the relationship between Cen. typicus and alongshore transport was not significant. The present study highlights the importance of spatial scales in the study of marine populations: observed long term changes in the northern region were different from the south for both species. PMID:24498177

76 FR 54787 - Outer Continental Shelf Official Protraction Diagram, Lease Maps, and Supplemental Official Outer...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-09-02

.... ACTION: Availability of revised North American Datum of 1927 (NAD 27) Outer Continental Shelf Official...: Notice is hereby given that effective with this publication, the following NAD 27-based Outer Continental...

77 FR 71612 - Atlantic Wind Lease Sale 2 (ATLW2) Commercial Leasing for Wind Power on the Outer Continental...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-12-03

... Wind Lease Sale 2 (ATLW2) Commercial Leasing for Wind Power on the Outer Continental Shelf Offshore...), Interior. ACTION: Proposed Sale Notice for commercial leasing for wind power on the Outer Continental Shelf... sale of commercial wind energy leases on the Outer Continental Shelf (OCS) offshore Rhode Island and...

Asset Decommissioning Risk Metrics for Floating Structures in the Gulf of Mexico.

PubMed

Kaiser, Mark J

2015-08-01

Public companies in the United States are required to report standardized values of their proved reserves and asset retirement obligations on an annual basis. When compared, these two measures provide an aggregate indicator of corporate decommissioning risk but, because of their consolidated nature, cannot readily be decomposed at a more granular level. The purpose of this article is to introduce a decommissioning risk metric defined in terms of the ratio of the expected value of an asset's reserves to its expected cost of decommissioning. Asset decommissioning risk (ADR) is more difficult to compute than a consolidated corporate risk measure, but can be used to quantify the decommissioning risk of structures and to perform regional comparisons, and also provides market signals of future decommissioning activity. We formalize two risk metrics for decommissioning and apply the ADR metric to the deepwater Gulf of Mexico (GOM) floater inventory. Deepwater oil and gas structures are expensive to construct, and at the end of their useful life, will be expensive to decommission. The value of proved reserves for the 42 floating structures in the GOM circa January 2013 is estimated to range between $37 and $80 billion for future oil prices between 60 and 120 $/bbl, which is about 10 to 20 times greater than the estimated $4.3 billion to decommission the inventory. Eni's Allegheny and MC Offshore's Jolliet tension leg platforms have ADR metrics less than one and are approaching the end of their useful life. Application of the proposed metrics in the regulatory review of supplemental bonding requirements in the U.S. Outer Continental Shelf is suggested to complement the current suite of financial metrics employed. © 2015 Society for Risk Analysis.

Solar Variability Controls on Rainfall in the Last Millennia: Evidence from a Highly Resolved Stalagmite Record from DeSoto Caverns (USA)

NASA Astrophysics Data System (ADS)

Aharon, P.; Lambert, W.; Hellstrom, J.

2009-12-01

Moisture transport from the Gulf of Mexico (GOM) inland has a considerable influence on both regional and continental rainfall patterns. Recent episodes of drought in the Southeastern USA exposed the vulnerability of the regional infrastructure to climate changes and gave rise to inter-state “water wars”. In order to better understand the cause of these periodic droughts and their controlling climate factors we have initiated a study of stalagmites from the DeSoto Caverns (Alabama, USA) that intersect the moisture flow from GOM. Combination of unusually high growth rates (up to 2 mm/decade), prominent dark and light seasonal layers, pristine aragonite mineralogy, precise U/Th dates acquired from mg-size samples and tight sampling (n=195) afforded generation of biannual (δ18O and δ13C of exceptional clarity spanning the last 700 yrs. The stalagmite (DSSG1) top yields isotope values (δ18O=-5.5 per-mill VPDB; δ13C=-10.1 per-mill VPDB) that are in good agreement with the predicted equilibrium isotope values. The oxygen and carbon isotope records exhibit a number of alternating negative and positive phase changes of

30 CFR 256.0 - Authority for information collection.

Code of Federal Regulations, 2010 CFR

2010-07-01

... OF SULPHUR OR OIL AND GAS IN THE OUTER CONTINENTAL SHELF Outer Continental Shelf Oil, Gas, and... part 256, Leasing of Sulphur or Oil and Gas in the Outer Continental Shelf.” (b) MMS collects this...

76 FR 55090 - Commercial Lease of Submerged Lands for Renewable Energy Development on the Outer Continental Shelf

Federal Register 2010, 2011, 2012, 2013, 2014

2011-09-06

...-2011-0039] Commercial Lease of Submerged Lands for Renewable Energy Development on the Outer... renewable energy leases on the Outer Continental Shelf. In the preamble to the April 29, 2009, Final Rule, ``Renewable Energy and Alternate Uses of Existing Facilities on the Outer Continental Shelf,'' BOEMRE stated...

30 CFR 256.4 - Authority.

Code of Federal Regulations, 2011 CFR

2011-07-01

... OFFSHORE LEASING OF SULPHUR OR OIL AND GAS IN THE OUTER CONTINENTAL SHELF Outer Continental Shelf Oil, Gas... for oil and gas, and sulphur, in submerged lands of the outer Continental Shelf (OCS). The Act... major oil and gas producers. [64 FR 72795, Dec. 28, 1999] ...

77 FR 24980 - Notice on Outer Continental Shelf Oil and Gas Lease Sales

Federal Register 2010, 2011, 2012, 2013, 2014

2012-04-26

... DEPARTMENT OF THE INTERIOR Bureau of Ocean Energy Management Notice on Outer Continental Shelf Oil... Outer Continental Shelf oil and gas lease sales to be held during the bidding period May 1, 2012... Corporation ExxonMobil Exploration Company Group II. Shell Oil Company Shell Offshore Inc. SWEPI LP Shell...

30 CFR 256.0 - Authority for information collection.

Code of Federal Regulations, 2011 CFR

2011-07-01

... OF THE INTERIOR OFFSHORE LEASING OF SULPHUR OR OIL AND GAS IN THE OUTER CONTINENTAL SHELF Outer Continental Shelf Oil, Gas, and Sulphur Management, General § 256.0 Authority for information collection. (a... information collection is “30 CFR part 256, Leasing of Sulphur or Oil and Gas in the Outer Continental Shelf...

75 FR 82055 - Commercial Leasing for Wind Power on the Outer Continental Shelf (OCS) Offshore Massachusetts...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-12-29

... No. BOEM-2010-0063] Commercial Leasing for Wind Power on the Outer Continental Shelf (OCS) Offshore..., Interior. ACTION: RFI in Commercial Wind Energy Leasing Offshore Massachusetts, and Invitation for Comments... the construction of a wind energy project(s) on the Outer Continental Shelf (OCS) offshore...

Mesozoic to Recent, regional tectonic controls on subsidence patterns in the Gulf of Mexico basin

NASA Astrophysics Data System (ADS)

Almatrood, M.; Mann, P.; Bugti, M. N.

2016-12-01

We have produced subsidence plots for 26 deep wells into the deeper-water areas of the Gulf of Mexico (GOM) in order to identify regional tectonic controls and propose tectonic phases. Our results show three sub-regions of the GOM basin that have distinctive and correlative subsidence patterns: 1) Northern GOM from offshore Texas to central Florida (9 wells) - this area is characterized by a deeply buried, Triassic-early Jurassic rift event that is not represented by our wells that penetrate only the post-rift Cretaceous to recent passive margin phase. The sole complexity in the passive margin phase of this sub-region is the acceleration of prograding clastic margins including the Mississippi fan in Miocene time; 2) Southeastern GOM in the Straits of Florida and Cuba area (5 wells) - this area shows that the Cretaceous passive margin overlying the rift phase is abruptly drowned in late Cretaceous as this part of the passive margin of North America that is flexed and partially subducted beneath the Caribbean arc as it encroaches from the southwest to eventually collide with the North American passive margin in the Paleogene; 3) Western GOM along the length of the eastern continental margin of Mexico (12 wells) - this is the most complex of the three areas in that shares the Mesozic rifting and passive margin phase but is unique with a slightly younger collisional event and foreland basin phase associated with the Laramide orogeny in Mexico extending from the KT boundary to the Oligocene. Following this orogenic event there is a re-emergence of the passive margin phase during the Neogene along locally affected by extensional and convergent deformation associated with passive margin fold belts. In summary, the GOM basin exhibits evidence for widespread rifting and passive margin formation associated with the breakup of Pangea in Mesozoic times that was locally superimposed and deformed during the late Cretaceous-Paleogene period by: 1) Caribbean subduction and collision along its southeastern edge; and 2) Laramide collision along its western edge in Mexico.

77 FR 5529 - Commercial Lease of Submerged Lands for Renewable Energy Development on the Outer Continental Shelf

Federal Register 2010, 2011, 2012, 2013, 2014

2012-02-03

... Submerged Lands for Renewable Energy Development on the Outer Continental Shelf AGENCY: Bureau of Ocean... use Form 0008 to issue commercial renewable energy leases on the Outer Continental Shelf (OCS). In the preamble to the April 29, 2009, Final Rule, ``Renewable Energy and Alternate Uses of Existing Facilities on...

77 FR 71621 - Atlantic Wind One (ATLW1) Commercial Leasing for Wind Power on the Outer Continental Shelf...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-12-03

... Wind One (ATLW1) Commercial Leasing for Wind Power on the Outer Continental Shelf Offshore Virginia... Notice for Commercial Leasing for Wind Power on the Outer Continental Shelf Offshore Virginia. SUMMARY... (FONSI) for commercial wind lease issuance and site assessment activities on the Atlantic OCS offshore...

77 FR 10707 - Safety Zone; NOBLE DISCOVERER, Outer Continental Shelf Drillship, Chukchi and Beaufort Seas, Alaska

Federal Register 2010, 2011, 2012, 2013, 2014

2012-02-23

...-AA00 Safety Zone; NOBLE DISCOVERER, Outer Continental Shelf Drillship, Chukchi and Beaufort Seas... Chukchi and Beaufort Seas Outer Continental Shelf, Alaska, from 12:01 a.m. on July 1, 2012 through 11:59 p... order to drill exploratory wells in several prospects located in the Chukchi and Beaufort Seas during...

CADASIL: Ultrastructural insights into the morphology of granular osmiophilic material.

PubMed

Lorenzi, Teresa; Ragno, Michele; Paolinelli, Francesca; Castellucci, Clara; Scarpelli, Marina; Morroni, Manrico

2017-03-01

Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) is a hereditary systemic vascular disorder. Granular osmiophilic material (GOM) is its ultrastructural marker. We reviewed tissue biopsies from CADASIL patients to establish whether ultrastructural observations help clarify the pathogenic mechanism of CADASIL. Given the resemblance of the GOM deposits to the immunoglobulin deposits seen in glomerulonephritis and focal segmental glomerulosclerosis (FSGS), their morphologies were investigated and compared. Skin, skeletal muscle, kidney, and pericardium tissue biopsies from 13 patients with a clinical and molecular diagnosis of CADASIL, and kidney biopsies from five patients with IgA nephropathy and five patients with primary FSGS were subjected to ultrastructural examination. In CADASIL patients, several GOM deposits from all sites were partially or totally surrounded by an electron-lucent halo. The deposits frequently had a more electron-dense portion with a regular outline on the inner side and a less osmiophilic, looser outer side displaying a less regular profile. The uniformly dense deposits tended to be more osmiophilic if located close to the cell membrane and less osmiophilic if laid farther away from it. The immunoglobulin deposits from the glomerulonephritis and FSGS patients lacked both the granular pattern and the halo. This study demonstrates that GOM deposits may have a nonuniform morphology and describes in detail an electron-lucent halo surrounding several of them. It is conceivable that the halo is the morphological evidence and possibly the cause of an aberrant NOTCH3 processing, already suspected to be involved in CADASIL.

An Overview of Coral Community Development on Offshore Platforms in the Gulf of Mexico

NASA Astrophysics Data System (ADS)

Sammarco, P. W.

2016-02-01

Oil platforms in the N. Gulf of Mexico (GOM) number 1,750, providing hard substratum for settlement of marine fauna, including corals, where little existed in shallow water prior to the 1940s. The introduction of hard substratum has facilitated the biogeographic expansion of Caribbean reef corals. We surveyed scleractinian corals, hermatypic and ahermatypic, on 48 platforms around the Flower Garden Banks (FGB) and across the continental shelf, from Corpus Christi, Texas to Mobile, Alabama, USA. We also assessed coral populations on platforms and the FGB for genetic affinities using AFLPs. The western limit for hermatypes was the shelf edge off Corpus Christi. The highest hermatypic densities occurred at the shelf edge, 200 km from shore in the north-central GOM. Mobile was the eastern limit for some hermatypic corals. Ahermatypes (i.e., Tubastraea coccinea, Oculina diffusa, Phyllangia americana) were absent inshore and in the north-central GOM. Species richness of hermatypic corals peaked near the FGB. Genetic analyses revealed high self-recognition and site fidelity on the platforms and the FGB in Madracis decactis, particularly in the eastern GOM. Platform populations exhibited a strong genetic affinity to those on the FGB, indicating that the FGB are the likely larval source for many corals on the platforms. There was little or no genetic affinity of coral populations across the mouth of the Mississippi River, although in T. coccinea (invasive species), cross-recognition between populations was higher between platforms on a given side. The Mississippi is a strong geographic barrier to east-west dispersal. Brooders were found to be more effective at colonizing patchy habitats at this meso-scale than broadcasters (Diploria strigosa and Montastraea cavernosa). Broadcaster recruits were rarely found, indicating less effective dispersal capabilities. Oil/gas platforms have facilitated the development of coral communities across the northern GOM.

78 FR 47748 - Right-of-Way Grant of Submerged Lands on the Outer Continental Shelf to Support Renewable Energy...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-08-06

...-Way Grant of Submerged Lands on the Outer Continental Shelf to Support Renewable Energy Development... will use Form 0009 to issue a renewable energy right-of- way (ROW) grant on the Outer Continental Shelf....gov/Renewable-Energy Program/ Regulatory-Information/Index.aspx. DATES: The ROW grant form will be...

77 FR 52353 - Right-of-Way Grant of Submerged Lands on the Outer Continental Shelf to Support Renewable Energy...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-08-29

... of Submerged Lands on the Outer Continental Shelf to Support Renewable Energy Development AGENCY... would be used to issue Outer Continental Shelf (OCS) renewable energy right-of-way (ROW) grants in order... renewable energy, but does not constitute a project easement. The ability of an ROW grantee to install such...

78 FR 52239 - Oil and Gas and Sulphur Operations on the Outer Continental Shelf-Oil and Gas Production Safety...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-08-22

... Environmental Enforcement 30 CFR Part 250 Oil and Gas and Sulphur Operations on the Outer Continental Shelf--Oil and Gas Production Safety Systems; Proposed Rule #0;#0;Federal Register / Vol. 78 , No. 163 / Thursday...] RIN 1014-AA10 Oil and Gas and Sulphur Operations on the Outer Continental Shelf--Oil and Gas...

77 FR 39164 - Safety Zone; KULLUK, Outer Continental Shelf Mobile Offshore Drilling Unit (MODU), Beaufort Sea, AK

Federal Register 2010, 2011, 2012, 2013, 2014

2012-07-02

... sensitivity of the environmental and subsistence importance to the indigenous population; (4) the lack of any... Outer Continental Shelf Lands Act and 33 C.F.R 147. Accordingly, State and Local law enforcement... due to the location of the MODU KULLUK on the Outer Continental Shelf and its distance from both land...

75 FR 55970 - Safety Zone; VERMILION 380A at Block 380 Outer Continental Shelf Fixed Platform in the Gulf of...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-09-15

...-AA00 Safety Zone; VERMILION 380A at Block 380 Outer Continental Shelf Fixed Platform in the Gulf of... safety zone around VERMILION 380A, a fixed platform, at Block 380 in the Outer Continental Shelf, approximately 90 miles south of Vermilion Bay, Louisiana. The fixed platform is on fire and the safety zone is...

Continental Margins of the Arctic Ocean: Implications for Law of the Sea

NASA Astrophysics Data System (ADS)

Mosher, David

2016-04-01

A coastal State must define the outer edge of its continental margin in order to be entitled to extend the outer limits of its continental shelf beyond 200 M, according to article 76 of the UN Convention on the Law of the Sea. The article prescribes the methods with which to make this definition and includes such metrics as water depth, seafloor gradient and thickness of sediment. Note the distinction between the "outer edge of the continental margin", which is the extent of the margin after application of the formula of article 76, and the "outer limit of the continental shelf", which is the limit after constraint criteria of article 76 are applied. For a relatively small ocean basin, the Arctic Ocean reveals a plethora of continental margin types reflecting both its complex tectonic origins and its diverse sedimentation history. These factors play important roles in determining the extended continental shelves of Arctic coastal States. This study highlights the critical factors that might determine the outer edge of continental margins in the Arctic Ocean as prescribed by article 76. Norway is the only Arctic coastal State that has had recommendations rendered by the Commission on the Limits of the Continental Shelf (CLCS). Russia and Denmark (Greenland) have made submissions to the CLCS to support their extended continental shelves in the Arctic and are awaiting recommendations. Canada has yet to make its submission and the US has not yet ratified the Convention. The various criteria that each coastal State has utilized or potentially can utilize to determine the outer edge of the continental margin are considered. Important criteria in the Arctic include, 1) morphological continuity of undersea features, such as the various ridges and spurs, with the landmass, 2) the tectonic origins and geologic affinities with the adjacent land masses of the margins and various ridges, 3) sedimentary processes, particularly along continental slopes, and 4) thickness and continuity of the sediment stratigraphy within the basins. The enclosed nature of the Arctic basin and the undersea ridges that transect the width of the basin result in complex geographies for the coastal States. The relevant fact, therefore, is that the five coastal States surrounding the ocean should have a common understanding of the geological and morphological features and the use of these features in determining the outer edge of the continental margin.

Early evolution of the Gulf of Mexico and the origin of the pervasive salt

NASA Astrophysics Data System (ADS)

Lawver, L. A.; Norton, I. O.; Gahagan, L.

2016-12-01

The final stage of formation of the Gulf of Mexico (GOM) is fairly well constrained, while the earlier evolution is still debated. During the final stage, Yucatan rotated about a Florida Straits Euler pole that created most of the oceanic crust in the GOM. From observations of salt overlying seaward-dipping reflectors (diagnostic of volcanism during the rift to drift transition) in the northeast GOM we suggest that salt was deposited at the onset of sea floor spreading, which coincides with initiation of the rotational motion of Yucatan. Salt is Callovian or earliest Oxfordian in age, and the next oldest rocks known from the northern GOM are Late Triassic redbeds found in what are generally regarded as grabens formed during early rifting. Since there was a long-lived, strikingly linear, continental margin arc in Mexico that lasted from the Permian through the Middle Jurassic (Barboza-Gudino et al., 2012), a lot of the rocks of this age seen in Mexico that are linked to GOM rifting are in fact associated with this earlier arc. This arc places major constraints on a pre-rift reconstruction involving North America, Africa, South America, Yucatan and the Tampico block of Mexico and defines the space available for Yucatan. In this presentation we will review reconstructions of the region and develop a tectonic model that forms the basis for further understanding of rifting in the GOM. A consequence of our new model involves a back-arc basin that is represented by the compressed Juarez or Cuicateco terrane of southeastern Mexico. The opening of this basin, coupled with the early opening of the Central Atlantic and the motion of South America away from Yucatan, not only allowed Yucatan to begin its rotation but may also be part of the "western" seaway that brought the necessary sea water into the Gulf to form the thick salt deposits. Barboza-Gudino, J.R., Molina-Garza. R.S., and Lawton, T.E., 2012. Sierra de Cato-: Remnants of the ancient western equatorial margin of Pangea in central Mexico, in Aranda-Górner. J.J., Tolsan. G., 2nd Molina-Gana, R.S.. eds., The Southern Cordillera and Beyond: Geological Society of America Field Guide 25. p. 1-18, doi:lO.l I30/2012.W25(01).

76 FR 48861 - Notice of Issuance of Final Outer Continental Shelf Air Permit for Anadarko Petroleum Corporation

Federal Register 2010, 2011, 2012, 2013, 2014

2011-08-09

... Continental Shelf Air Permit for Anadarko Petroleum Corporation AGENCY: Environmental Protection Agency (EPA... final Outer Continental Shelf (OCS) air permit for Anadarko Petroleum Corporation (Anadarko). The permit... Petroleum Corporation regarding the project. EPA carefully reviewed each of the comments submitted and...

76 FR 63654 - Outer Continental Shelf Official Protraction Diagram, Lease Maps, and Supplemental Official Outer...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-10-13

... Protraction Diagram, Lease Maps, and Supplemental Official Outer Continental Shelf Block Diagrams AGENCY... Supplemental Official OCS Block Diagrams (SOBDs); Correction. SUMMARY: BOEM (formerly the Bureau of Ocean... Official OCS Shelf Block Diagrams'' that contained an error. This notice corrects the address of the Web...

77 FR 4294 - Agency Information Collection Activities; Submission to OMB for Review and Approval; Comment...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-01-27

... Activities; Submission to OMB for Review and Approval; Comment Request; Air Pollution Regulations for Outer... electronic docket, go to www.regulations.gov . Title: Air Pollution Regulations for Outer Continental Shelf... Act gives EPA responsibility for regulating air pollution from outer continental shelf (OCS) sources...

75 FR 1076 - Outer Continental Shelf Civil Penalties

Federal Register 2010, 2011, 2012, 2013, 2014

2010-01-08

...The Outer Continental Shelf Lands Act requires the MMS to review the maximum daily civil penalty assessment for violations of regulations governing oil and gas operations in the Outer Continental Shelf at least once every 3 years. This review ensures that the maximum penalty assessment reflects any increases in the Consumer Price Index as prepared by the Bureau of Labor Statistics, U.S. Department of Labor. After conducting the required review in August 2009, the MMS determined that no adjustment is necessary at this time.

33 CFR 106.260 - Security measures for access control.

Code of Federal Regulations, 2013 CFR

2013-07-01

... SECURITY MARITIME SECURITY MARINE SECURITY: OUTER CONTINENTAL SHELF (OCS) FACILITIES Outer Continental... unattended spaces that adjoin areas to which OCS facility personnel and visitors have access; (9) Ensure OCS...

33 CFR 106.260 - Security measures for access control.

Code of Federal Regulations, 2012 CFR

2012-07-01

... SECURITY MARITIME SECURITY MARINE SECURITY: OUTER CONTINENTAL SHELF (OCS) FACILITIES Outer Continental... unattended spaces that adjoin areas to which OCS facility personnel and visitors have access; (9) Ensure OCS...

33 CFR 106.260 - Security measures for access control.

Code of Federal Regulations, 2011 CFR

2011-07-01

... SECURITY MARITIME SECURITY MARINE SECURITY: OUTER CONTINENTAL SHELF (OCS) FACILITIES Outer Continental... unattended spaces that adjoin areas to which OCS facility personnel and visitors have access; (9) Ensure OCS...

33 CFR 106.260 - Security measures for access control.

Code of Federal Regulations, 2014 CFR

2014-07-01

... SECURITY MARITIME SECURITY MARINE SECURITY: OUTER CONTINENTAL SHELF (OCS) FACILITIES Outer Continental... unattended spaces that adjoin areas to which OCS facility personnel and visitors have access; (9) Ensure OCS...

33 CFR 106.260 - Security measures for access control.

Code of Federal Regulations, 2010 CFR

2010-07-01

... SECURITY MARITIME SECURITY MARINE SECURITY: OUTER CONTINENTAL SHELF (OCS) FACILITIES Outer Continental... unattended spaces that adjoin areas to which OCS facility personnel and visitors have access; (9) Ensure OCS...

78 FR 1759 - Notice of Approval of Clean Air Act Outer Continental Shelf Minor Source/Title V Minor Permit...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-01-09

... Outer Continental Shelf Minor Source/Title V Minor Permit Modification Issued to Shell Offshore, Inc. for the Kulluk Conical Drilling Unit AGENCY: United States Environmental Protection Agency (EPA... decision granting Shell Offshore Inc.'s (``Shell'') request for minor modifications of Clean Air Act Outer...

77 FR 15118 - Information Collection Activities: Operations in the Outer Continental Shelf for Minerals Other...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-03-14

...-0005; OMB Number 1014-NEW] Information Collection Activities: Operations in the Outer Continental Shelf for Minerals Other Than Oil, Gas, and Sulphur; Submitted for Office of Management and Budget (OMB... (ICR) for approval of the paperwork requirements in the regulations under Operations in the Outer...

78 FR 67326 - Safety and Environmental Management System Requirements for Vessels on the U.S. Outer Continental...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-11-12

... 1625-AC05 Safety and Environmental Management System Requirements for Vessels on the U.S. Outer... ``Safety and Environmental Management System Requirements for Vessels on the U.S. Outer Continental Shelf... of industry to ensure stakeholders have adequate time to submit complete responses. DATES: Comments...

30 CFR 256.12 - Supplemental sales.

Code of Federal Regulations, 2011 CFR

2011-07-01

... INTERIOR OFFSHORE LEASING OF SULPHUR OR OIL AND GAS IN THE OUTER CONTINENTAL SHELF Outer Continental Shelf Oil, Gas, and Sulphur Management, General § 256.12 Supplemental sales. (a) The Secretary may conduct a...

30 CFR 256.10 - Information to States.

Code of Federal Regulations, 2011 CFR

2011-07-01

... INTERIOR OFFSHORE LEASING OF SULPHUR OR OIL AND GAS IN THE OUTER CONTINENTAL SHELF Outer Continental Shelf Oil, Gas, and Sulphur Management, General § 256.10 Information to States. (a) The information covered...

30 CFR 256.1 - Purpose.

Code of Federal Regulations, 2011 CFR

2011-07-01

... LEASING OF SULPHUR OR OIL AND GAS IN THE OUTER CONTINENTAL SHELF Outer Continental Shelf Oil, Gas, and... administer a leasing program for oil, gas and sulphur. The procedures under which the Secretary will exercise...

30 CFR 280.80 - Paperwork Reduction Act statement-information collection.

Code of Federal Regulations, 2010 CFR

2010-07-01

... OFFSHORE PROSPECTING FOR MINERALS OTHER THAN OIL, GAS, AND SULPHUR ON THE OUTER CONTINENTAL SHELF... CFR part 280, Prospecting for Minerals other than Oil, Gas, and Sulphur on the Outer Continental Shelf...

30 CFR 256.8 - Leasing maps and diagrams.

Code of Federal Regulations, 2011 CFR

2011-07-01

... INTERIOR OFFSHORE LEASING OF SULPHUR OR OIL AND GAS IN THE OUTER CONTINENTAL SHELF Outer Continental Shelf Oil, Gas, and Sulphur Management, General § 256.8 Leasing maps and diagrams. (a) Any area of the OCS...

Large-scale deposition of weathered oil in the Gulf of Mexico following a deep-water oil spill.

PubMed

Romero, Isabel C; Toro-Farmer, Gerardo; Diercks, Arne-R; Schwing, Patrick; Muller-Karger, Frank; Murawski, Steven; Hollander, David J

2017-09-01

The blowout of the Deepwater Horizon (DWH) drilling rig in 2010 released an unprecedented amount of oil at depth (1,500 m) into the Gulf of Mexico (GoM). Sedimentary geochemical data from an extensive area (∼194,000 km 2 ) was used to characterize the amount, chemical signature, distribution, and extent of the DWH oil deposited on the seafloor in 2010-2011 from coastal to deep-sea areas in the GoM. The analysis of numerous hydrocarbon compounds (N = 158) and sediment cores (N = 2,613) suggests that, 1.9 ± 0.9 × 10 4 metric tons of hydrocarbons (>C9 saturated and aromatic fractions) were deposited in 56% of the studied area, containing 21± 10% (up to 47%) of the total amount of oil discharged and not recovered from the DWH spill. Examination of the spatial trends and chemical diagnostic ratios indicate large deposition of weathered DWH oil in coastal and deep-sea areas and negligible deposition on the continental shelf (behaving as a transition zone in the northern GoM). The large-scale analysis of deposited hydrocarbons following the DWH spill helps understanding the possible long-term fate of the released oil in 2010, including sedimentary transformation processes, redistribution of deposited hydrocarbons, and persistence in the environment as recycled petrocarbon. Copyright © 2017 The Authors. Published by Elsevier Ltd.. All rights reserved.

33 CFR 106.300 - General.

Code of Federal Regulations, 2014 CFR

2014-07-01

... Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARINE SECURITY: OUTER CONTINENTAL SHELF (OCS) FACILITIES Outer Continental Shelf (OCS) Facility Security Assessment (FSA) § 106.300 General. (a) The Facility Security Assessment (FSA) is a written document that is...

33 CFR 106.300 - General.

Code of Federal Regulations, 2012 CFR

2012-07-01

... Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARINE SECURITY: OUTER CONTINENTAL SHELF (OCS) FACILITIES Outer Continental Shelf (OCS) Facility Security Assessment (FSA) § 106.300 General. (a) The Facility Security Assessment (FSA) is a written document that is...

33 CFR 106.300 - General.

Code of Federal Regulations, 2013 CFR

2013-07-01

... Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARINE SECURITY: OUTER CONTINENTAL SHELF (OCS) FACILITIES Outer Continental Shelf (OCS) Facility Security Assessment (FSA) § 106.300 General. (a) The Facility Security Assessment (FSA) is a written document that is...

33 CFR 106.300 - General.

Code of Federal Regulations, 2011 CFR

2011-07-01

... Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARINE SECURITY: OUTER CONTINENTAL SHELF (OCS) FACILITIES Outer Continental Shelf (OCS) Facility Security Assessment (FSA) § 106.300 General. (a) The Facility Security Assessment (FSA) is a written document that is...

30 CFR 250.1405 - When is a case file developed?

Code of Federal Regulations, 2010 CFR

2010-07-01

... 250.1405 Mineral Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Outer Continental Shelf (OCS) Civil... Officer may administer oaths and issue subpoenas requiring witnesses to attend meetings, submit...

30 CFR 256.1 - Purpose.

Code of Federal Regulations, 2010 CFR

2010-07-01

... MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE LEASING OF SULPHUR OR OIL AND GAS IN THE OUTER CONTINENTAL SHELF Outer Continental Shelf Oil, Gas, and Sulphur Management, General § 256.1... Secretary of the Interior (Secretary) will exercise the authority to administer a leasing program for oil...

30 CFR 256.4 - Authority.

Code of Federal Regulations, 2010 CFR

2010-07-01

... Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE LEASING OF SULPHUR OR OIL AND GAS IN THE OUTER CONTINENTAL SHELF Outer Continental Shelf Oil, Gas, and Sulphur Management, General... Secretary of the Interior to issue, on a competitive basis, leases for oil and gas, and sulphur, in...

33 CFR 106.305 - Facility Security Assessment (FSA) requirements.

Code of Federal Regulations, 2013 CFR

2013-07-01

..., including computer systems and networks; (vi) Existing agreements with private security companies; (vii) Any... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Facility Security Assessment (FSA... SECURITY MARITIME SECURITY MARINE SECURITY: OUTER CONTINENTAL SHELF (OCS) FACILITIES Outer Continental...

33 CFR 106.305 - Facility Security Assessment (FSA) requirements.

Code of Federal Regulations, 2011 CFR

2011-07-01

..., including computer systems and networks; (vi) Existing agreements with private security companies; (vii) Any... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Facility Security Assessment (FSA... SECURITY MARITIME SECURITY MARINE SECURITY: OUTER CONTINENTAL SHELF (OCS) FACILITIES Outer Continental...

33 CFR 106.305 - Facility Security Assessment (FSA) requirements.

Code of Federal Regulations, 2014 CFR

2014-07-01

..., including computer systems and networks; (vi) Existing agreements with private security companies; (vii) Any... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Facility Security Assessment (FSA... SECURITY MARITIME SECURITY MARINE SECURITY: OUTER CONTINENTAL SHELF (OCS) FACILITIES Outer Continental...

33 CFR 106.305 - Facility Security Assessment (FSA) requirements.

Code of Federal Regulations, 2012 CFR

2012-07-01

..., including computer systems and networks; (vi) Existing agreements with private security companies; (vii) Any... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Facility Security Assessment (FSA... SECURITY MARITIME SECURITY MARINE SECURITY: OUTER CONTINENTAL SHELF (OCS) FACILITIES Outer Continental...

A Broadband Investigation of the Texas/Gulf of Mexico Passive Margin

NASA Astrophysics Data System (ADS)

Evanzia, D.; Ainsworth, R.; Pratt, K. W.; Pulliam, J.; Gurrola, H.

2012-12-01

The lithosphere of central and east Texas underwent two cycles of continental rifting and orogeny from the formation of Laurentia and assembly through the breakup of Pangea. The craton itself, exposed in the Llano uplift of central Texas, formed ~1.4 Ga as part of the great expanse of Mesoproterozoic crust that makes up southern Laurentia. Some of this crust was deformed during the Grenville orogeny ~1.1 Ga. Southern Laurentia was subsequently stable until rifting began in Cambrian time (~530 Ma). Suturing of Gondwana to Laurentia (310-290 Ma) during the assembly of Pangea formed the Ouachita orogen in west Texas. Sometime before 200 Ma rifting was initiated, opening the Gulf of Mexico (GoM). In north and east Texas the Ouachita front lies north of GoM rifting but, according to deep seismic data, Ouachita structures appear to coincide with GoM rifting in south and central Texas. This suggests that rifting in that region occurred along structures that were weakened previously by Ouachita deformation and reactivated during the Jurassic opening of the GoM. It is not clear whether the process that created the Gulf of Mexico and led to the formation of Texas' Gulf Coast Plain (GCP) is best described as "active" or "passive" rifting. A recent study interpreted the GCP to be a volcanic rifted margin—an active rifting process—using available gravity, magnetic, drilling and geological data, but older studies describe the opening of the GoM as a passive event. In the coastal plain, a large magnetic anomaly suggests that the crust here was modified by volcanism. Seismic data are sparse and of limited quality in the Gulf Coast region so we conducted a 2.5-year broadband seismograph transect across the GCP in an effort to clarify its structure and origin. In all, twenty-three broadband seismographs were deployed in a line from Matagorda Island, in the Gulf of Mexico, to Johnson City, TX, on the uplifted Llano Plateau from July 2010 to December 2012. These seismographs have an average spacing of 15 km and coincided with the deployment of EarthScope Transportable Array stations in central and east Texas. We will present the results of P- and S-wave tomographic inversions for upper mantle structure beneath the array.

30 CFR 256.12 - Supplemental sales.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 30 Mineral Resources 2 2010-07-01 2010-07-01 false Supplemental sales. 256.12 Section 256.12 Mineral Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE LEASING OF SULPHUR OR OIL AND GAS IN THE OUTER CONTINENTAL SHELF Outer Continental Shelf Oil, Gas, and Sulphur Management...

30 CFR 256.2 - Policy.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 30 Mineral Resources 2 2011-07-01 2011-07-01 false Policy. 256.2 Section 256.2 Mineral Resources BUREAU OF OCEAN ENERGY MANAGEMENT, REGULATION, AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE LEASING OF SULPHUR OR OIL AND GAS IN THE OUTER CONTINENTAL SHELF Outer Continental Shelf Oil, Gas, and...

76 FR 29156 - Outer Continental Shelf Air Regulations Consistency Update for California

Federal Register 2010, 2011, 2012, 2013, 2014

2011-05-20

... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 55 [OAR-2004-0091; FRL-9304-4] Outer Continental Shelf Air Regulations Consistency Update for California AGENCY: Environmental Protection Agency (EPA... ``significant regulatory action'' subject to review by the Office of Management and Budget under Executive Order...

75 FR 20859 - Outer Continental Shelf (OCS) Policy Committee; Notice and Agenda for Meeting

Federal Register 2010, 2011, 2012, 2013, 2014

2010-04-21

... DEPARTMENT OF THE INTERIOR Minerals Management Service Outer Continental Shelf (OCS) Policy Committee; Notice and Agenda for Meeting AGENCY: Minerals Management Service (MMS), Interior. ACTION: Notice.... Jeryne Bryant at Minerals Management Service, 381 Elden Street, Mail Stop 4001, Herndon, Virginia 20170...

75 FR 24966 - Notice on Outer Continental Shelf Oil and Gas Lease Sales

Federal Register 2010, 2011, 2012, 2013, 2014

2010-05-06

... DEPARTMENT OF THE INTERIOR Minerals Management Service Notice on Outer Continental Shelf Oil and Gas Lease Sales AGENCY: Minerals Management Service, Interior. ACTION: List of Restricted Joint Bidders. SUMMARY: Pursuant to the authority vested in the Director of the Minerals Management Service by...

30 CFR 285.101 - What is the purpose of this part?

Code of Federal Regulations, 2010 CFR

2010-07-01

... RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF General Provisions...) grants for renewable energy production on the Outer Continental Shelf (OCS) and RUEs for the alternate... obligations when you undertake activities authorized in this part; and (c) Ensure that renewable energy...

76 FR 13205 - Notice on Outer Continental Shelf Oil and Gas Lease Sales

Federal Register 2010, 2011, 2012, 2013, 2014

2011-03-10

... DEPARTMENT OF THE INTERIOR Bureau of Ocean Energy Management, Regulation and Enforcement Notice on Outer Continental Shelf Oil and Gas Lease Sales AGENCY: Bureau of Ocean Energy Management, Regulation... the name of an oil company listed under Group VIII in that notice. FOR FURTHER INFORMATION CONTACT...

30 CFR 256.8 - Leasing maps and diagrams.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 30 Mineral Resources 2 2010-07-01 2010-07-01 false Leasing maps and diagrams. 256.8 Section 256.8 Mineral Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE LEASING OF SULPHUR OR OIL AND GAS IN THE OUTER CONTINENTAL SHELF Outer Continental Shelf Oil, Gas, and Sulphur Management...

30 CFR 256.2 - Policy.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 30 Mineral Resources 2 2010-07-01 2010-07-01 false Policy. 256.2 Section 256.2 Mineral Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE LEASING OF SULPHUR OR OIL AND GAS IN THE OUTER CONTINENTAL SHELF Outer Continental Shelf Oil, Gas, and Sulphur Management, General § 256.2 Policy...

30 CFR 256.10 - Information to States.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 30 Mineral Resources 2 2010-07-01 2010-07-01 false Information to States. 256.10 Section 256.10 Mineral Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE LEASING OF SULPHUR OR OIL AND GAS IN THE OUTER CONTINENTAL SHELF Outer Continental Shelf Oil, Gas, and Sulphur Management...

77 FR 5561 - Information Collection Activities: Oil, Gas, and Sulphur Operations in the Outer Continental...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-02-03

...-0006; OMB Control Number 1014-NEW] Information Collection Activities: Oil, Gas, and Sulphur Operations in the Outer Continental Shelf, Subpart A, General; Submitted for Office of Management and Budget... Office of Management and Budget (OMB) for review and approval. The information collection request (ICR...

75 FR 17155 - Preparation of an Environmental Assessment (EA) for Proposed Outer Continental Shelf (OCS) Oil...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-04-05

... all requirements of NEPA, the Coastal Zone Management Act, Outer Continental Shelf Lands Act, and... consistent with each affected state's federally approved Coastal Zone Management program. Finally, the MMS...-circulation modeling, ecological effects of oil and gas activities, and hurricane impacts on coastal...

Notices of Intent for Coverage Under the NPDES General Permit for Oil and Gas Exploration Facilities on the Outer Continental Shelf in the Chukchi Sea

EPA Pesticide Factsheets

Notices of Intent (NOIs) submitted to EPA for coverage under the NPDES general permit for discharges from oil and gas exploration facilities on the outer continental shelf in the Chukchi Sea off Alaska.

77 FR 19321 - Geological and Geophysical Exploration on the Atlantic Outer Continental Shelf (OCS)

Federal Register 2010, 2011, 2012, 2013, 2014

2012-03-30

... by BOEM: (1) Oil and gas exploration and development; (2) renewable energy; and (3) marine minerals... DEPARTMENT OF THE INTERIOR Bureau of Ocean Energy Management Geological and Geophysical Exploration on the Atlantic Outer Continental Shelf (OCS) AGENCY: Bureau of Ocean Energy Management (BOEM...

76 FR 7518 - Outer Continental Shelf Air Regulations Consistency Update for Alaska

Federal Register 2010, 2011, 2012, 2013, 2014

2011-02-10

... ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 55 [EPA-R10-OAR-2011-0045; FRL-9265-3] Outer Continental Shelf Air Regulations Consistency Update for Alaska AGENCY: Environmental Protection Agency (``EPA... Greaves, Federal and Delegated Air Programs Unit, U.S. Environmental Protection Agency, Region 10, 1200...

30 CFR 250.1401 - Index table.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 30 Mineral Resources 2 2010-07-01 2010-07-01 false Index table. 250.1401 Section 250.1401 Mineral... OPERATIONS IN THE OUTER CONTINENTAL SHELF Outer Continental Shelf (OCS) Civil Penalties § 250.1401 Index table. The following table is an index of the sections in this subpart: § 250.1401Table Definitions...

75 FR 61511 - Intent To Prepare a Supplemental Environmental Impact Statement: Outer Continental Shelf, Alaska...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-10-05

... DEPARTMENT OF THE INTERIOR Bureau of Ocean Energy Management, Regulation and Enforcement Intent To Prepare a Supplemental Environmental Impact Statement: Outer Continental Shelf, Alaska OCS Region, Chukchi Sea Planning Area, Oil and Gas Lease Sale 193 AGENCY: Bureau of Ocean Energy Management, Regulation...

75 FR 10809 - Outer Continental Shelf (OCS) Scientific Committee-Notice of Renewal

Federal Register 2010, 2011, 2012, 2013, 2014

2010-03-09

... AGENCY: Minerals Management Service (MMS), Interior. ACTION: Notice of renewal of the Outer Continental... Minerals Management Service. The Committee reviews the relevance of the research and data being produced to meet MMS scientific information needs for decisionmaking and may recommend changes in scope, direction...

78 FR 48180 - Consolidation of Officer in Charge, Marine Inspection For Outer Continental Shelf Activities...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-08-07

... for all Mobile Offshore Drilling Units and Floating Outer Continental Shelf Facilities (as defined in... Commander. Vessels requiring Coast Guard inspection include Mobile Offshore Drilling Units (MODUs), Floating... engage directly in oil and gas exploration or production in the offshore waters of the Eighth Coast Guard...

77 FR 1019 - Renewable Energy Alternate Uses of Existing Facilities on the Outer Continental Shelf-Acquire a...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-01-09

...-0045] RIN 1010-AD79 Renewable Energy Alternate Uses of Existing Facilities on the Outer Continental... rule related to acquiring a lease non-competitively for offshore renewable energy projects. DATES... or Timothy Redding, Renewable Energy, BOEM, at (703) 787-1219 or email [email protected

77 FR 5830 - Commercial Wind Leasing and Site Assessment Activities on the Atlantic Outer Continental Shelf...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-02-06

...] Commercial Wind Leasing and Site Assessment Activities on the Atlantic Outer Continental Shelf Offshore... governments, offshore wind energy developers, and the public in the Department of the Interior's (DOI) ``Smart from the Start'' wind energy initiative offshore Massachusetts. The purpose of the ``Smart from the...

76 FR 5189 - BOEMRE Information Collection Activities: 1010-0081, Operations in the Outer Continental Shelf...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-01-28

... DEPARTMENT OF THE INTERIOR Bureau of Ocean Energy Management, Regulation and Enforcement [Docket ID No. BOEM-2010-0069] BOEMRE Information Collection Activities: 1010-0081, Operations in the Outer Continental Shelf for Minerals Other Than Oil, Gas, and Sulphur, Submitted for Office of Management and Budget...

76 FR 11079 - Oil and Gas and Sulphur Operations in the Outer Continental Shelf-Safety and Environmental...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-03-01

... DEPARTMENT OF THE INTERIOR Bureau of Ocean Energy Management, Regulation and Enforcement 30 CFR Part 250 [Docket ID: BOEM-2010-0076] Oil and Gas and Sulphur Operations in the Outer Continental Shelf--Safety and Environmental Management Systems; Public Workshop AGENCY: Bureau of Ocean Energy Management...

76 FR 79705 - Information Collection Activities: Operations in the Outer Continental Shelf for Minerals Other...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-12-22

.... BSEE-2011-0005; OMB Control Number 1014-NEW] Information Collection Activities: Operations in the Outer Continental Shelf for Minerals Other than Oil, Gas, and Sulphur; Submitted for Office of Management and Budget... Office of Management and Budget (OMB) for review and approval. The information collection request (ICR...

77 FR 68147 - Gulf of Mexico, Outer Continental Shelf (OCS), Western Planning Area (WPA), Oil and Gas Lease...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-11-15

... Environmental Impact Statement (Multisale FEIS). Authority: This NOA is published pursuant to the regulations... NEPA process. The Multisale FEIS evaluated the environmental and socioeconomic impacts for WPA Lease... DEPARTMENT OF THE INTERIOR Bureau of Ocean Energy Management Gulf of Mexico, Outer Continental...

78 FR 9731 - Gulf of Mexico, Outer Continental Shelf (OCS), Central Planning Area (CPA) Oil and Gas Lease Sale...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-02-11

... Environmental Impact Statement (Multisale FEIS). Authority: This NOA is published pursuant to the regulations... the NEPA process. The Multisale FEIS evaluated the environmental and socioeconomic impacts for CPA... DEPARTMENT OF THE INTERIOR Bureau of Ocean Energy Management Gulf of Mexico, Outer Continental...

78 FR 45965 - Research Lease on the Outer Continental Shelf (OCS) Offshore Virginia, Request for Competitive...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-07-30

...; MMAA104000] Research Lease on the Outer Continental Shelf (OCS) Offshore Virginia, Request for Competitive... Unsolicited Request for an OCS Research Lease; Request for Competitive Interest (RFCI); and Request for Public... for wind energy research activities; (2) solicit indications of interest in a renewable energy lease...

78 FR 33859 - Outer Continental Shelf (OCS) Geological and Geophysical Exploration Activities in the Gulf of...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-06-05

... DEPARTMENT OF THE INTERIOR Bureau of Ocean Energy Management [MMAA104000] Outer Continental Shelf...: Bureau of Ocean Energy Management (BOEM), Interior. ACTION: Notice of Intent; Notice of Scoping Meetings... 70123-2394, telephone (504) 736-3233. For information on the National Marine Fisheries Service (NMFS...

77 FR 44232 - Delegation of Authority To Implement and Enforce Outer Continental Shelf Air Regulations to the...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-07-27

... Outer Continental Shelf Air Regulations to the Delaware Department of Natural Resources and.... SUMMARY: On July 21, 2010, EPA sent the Delaware Department of Natural Resources and Environmental Control... of Natural Resources and Environmental Control, 89 Kings Highway, P.O. Box 1401, Dover, Delaware. FOR...

78 FR 36571 - North American Datum of 1983 (NAD 83) Outer Continental Shelf (OCS) Provisional Official...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-06-18

... DEPARTMENT OF THE INTERIOR Bureau of Ocean Energy Management [MMAA104000] North American Datum of 1983 (NAD 83) Outer Continental Shelf (OCS) Provisional Official Protraction Diagram (OPDs) AGENCY... OPDs. SUMMARY: Notice is hereby given that effective with this publication two NAD 83-based OCS...

33 CFR 106.415 - Amendment and audit.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Amendment and audit. 106.415 Section 106.415 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY MARITIME SECURITY MARINE SECURITY: OUTER CONTINENTAL SHELF (OCS) FACILITIES Outer Continental Shelf (OCS) Facility Security Plan (FSP) § 106.415 Amendment and...

76 FR 14681 - Commercial Leasing for Wind Power on the Outer Continental Shelf (OCS) Offshore Massachusetts...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-03-17

... No. BOEM-2010-0063] Commercial Leasing for Wind Power on the Outer Continental Shelf (OCS) Offshore..., Regulation and Enforcement (BOEMRE), Interior. ACTION: Request for Interest (RFI) in Commercial Wind Energy... (BOEMRE) is reopening the comment period on the RFI in Commercial Wind Energy Leasing Offshore...

77 FR 7148 - Notice of Approval of Clean Air Act Outer Continental Shelf Permits Issued to Shell Gulf of...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-02-10

... Shelf Permits Issued to Shell Gulf of Mexico, Inc., and Shell Offshore, Inc. for the Discoverer... Clean Air Act Outer Continental Shelf (OCS) permit applications, one from Shell Gulf of Mexico, Inc., for operation of the Discoverer drillship in the Chukchi Sea and one from Shell Offshore, Inc...

78 FR 8190 - Commercial Wind Leasing and Site Assessment Activities on the Atlantic Outer Continental Shelf...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-02-05

...] Commercial Wind Leasing and Site Assessment Activities on the Atlantic Outer Continental Shelf (OCS) Offshore... Assessment (EA) for Commercial Wind Leasing and Site Assessment Activities on the OCS Offshore North Carolina... INFORMATION: Background: On December 13, 2012, BOEM published the Notice in the Federal Register (77 FR 74218...

77 FR 10711 - Safety Zone; KULLUK, Outer Continental Shelf Mobile Offshore Drilling Unit (MODU), Beaufort Sea, AK

Federal Register 2010, 2011, 2012, 2013, 2014

2012-02-23

...-AA00 Safety Zone; KULLUK, Outer Continental Shelf Mobile Offshore Drilling Unit (MODU), Beaufort Sea... on location in order to drill exploratory wells at various prospects located in the Beaufort Sea... in order to drill exploratory wells in several prospects located in the Beaufort Sea during the 2012...

Managing the visual effects of outer continental shelf and other petroleum-related coastal development

Treesearch

Philip A. Marcus; Ethan T. Smith

1979-01-01

Five petroleum-related facilities often sited in the coastal zone during development of Outer Continental oil and gas can change the visual appearance of coastal areas. These facilities are service bases, platform fabrication yards, marine terminals and associated storage facilities, oil and gas processing facilities, and liquified natural gas terminals. Examples of...

75 FR 18404 - Safety Zone; FRONTIER DISCOVERER, Outer Continental Shelf Drillship, Chukchi and Beaufort Sea...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-04-12

... on location in order to drill exploratory wells at various prospects located in the Chukchi and Beaufort Sea Outer Continental Shelf, Alaska, during the 2010 drilling season. The purpose of the temporary... allisions, oil spills, and releases of natural gas, and thereby protect the safety of life, property, and...

75 FR 80717 - Increased Safety Measures for Energy Development on the Outer Continental Shelf; Availability...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-12-23

... 211111, Crude Petroleum and Natural Gas Extraction and 213111, Drilling Oil and Gas Wells. For these... identify measures necessary to improve the safety of oil and gas exploration and development on the Outer Continental Shelf in light of the Deepwater Horizon event on April 20, 2010, and resulting oil spill. To...

30 CFR 250.1497 - When will BOEMRE monitor my financial solvency?

Code of Federal Regulations, 2011 CFR

2011-07-01

... 30 Mineral Resources 2 2011-07-01 2011-07-01 false When will BOEMRE monitor my financial solvency? 250.1497 Section 250.1497 Mineral Resources BUREAU OF OCEAN ENERGY MANAGEMENT, REGULATION, AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Outer Continental Shelf Civil Penaltie...

75 FR 68824 - Commercial Leasing for Wind Power on the Outer Continental Shelf (OCS) Offshore Maryland-Request...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-11-09

... will use responses to this RFI to enable BOEMRE to gauge specific interest in commercial development of... BOEMRE Maryland Renewable Energy Task Force. A detailed description of the RFI area is found later in... Energy and Alternate Uses of Existing Facilities on the Outer Continental Shelf (REAU) rule. If...

DESIGNING AND CONDUCTING WORKSHOPS: LESSONS FROM A TWO-YEAR PROJECT (ONSHORE IMPACTS OF OUTER CONTINENTAL SHELF OIL AND GAS DEVELOPMENT: A TRAINING PROJECT)

EPA Science Inventory

The report describes the process of developing and conducting two series of workshops on 'Onshore Impact of Outer Continental Shelf Oil and Gas Development'. The purpose of this report is to evaluate the workshops from the standpoint of their objectives, content, teaching methods...

77 FR 47877 - Potential Commercial Leasing for Wind Power on the Outer Continental Shelf (OCS) Offshore Maine...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-08-10

... Commercial Leasing for Wind Power on the Outer Continental Shelf (OCS) Offshore Maine; Request for Interest... Request for a Commercial OCS Wind Lease, Request for Interest, and Request for Public Comment SUMMARY: The... (Statoil NA) to acquire an OCS wind lease; (2) solicit public input regarding the proposal, its potential...

77 FR 74512 - Interim Policy Leasing for Renewable Energy Data Collection Facility on the Outer Continental...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-12-14

... Policy Leasing for Renewable Energy Data Collection Facility on the Outer Continental Shelf off the Coast..., tribes, local governments, and the public in the preparation of an EA. The EA will consider the environmental consequences associated with issuing a lease for an offshore data collection facility located on...

76 FR 20367 - Commercial Leasing for Wind Power on the Outer Continental Shelf (OCS) Off Delaware...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-04-12

... No. BOEM-2011-0008] Commercial Leasing for Wind Power on the Outer Continental Shelf (OCS) Off... determination that no competitive interest exists in acquiring a commercial wind lease in the area offshore... a Request for Interest (RFI) in the Federal Register on April 26, 2010 (75 FR 21653). Bluewater Wind...

76 FR 4716 - Commercial Leasing for Wind Power on the Outer Continental Shelf (OCS) Off Delaware, Notice of...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-01-26

... No. BOEM-2010-0075] Commercial Leasing for Wind Power on the Outer Continental Shelf (OCS) Off... commercial wind development on the OCS off Delaware and requests submission of indications of competitive... received two nominations of proposed lease areas: One from Bluewater Wind Delaware LLC (Bluewater) and...

78 FR 8190 - Commercial Leasing for Wind Power on the Outer Continental Shelf (OCS) Offshore North Carolina...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-02-05

...] Commercial Leasing for Wind Power on the Outer Continental Shelf (OCS) Offshore North Carolina--Call for... Commercial Leasing for Wind Power Offshore North Carolina (Call), published on December 13, 2012 (77 FR 7204). DATES: BOEM must receive your nomination describing your interest in obtaining a commercial wind lease...

Surface Ocean pCO2 Seasonality and Sea-Air CO2 Flux Estimates for the North American East Coast

NASA Technical Reports Server (NTRS)

Signorini, Sergio; Mannino, Antonio; Najjar, Raymond G., Jr.; Friedrichs, Marjorie A. M.; Cai, Wei-Jun; Salisbury, Joe; Wang, Zhaohui Aleck; Thomas, Helmuth; Shadwick, Elizabeth

2013-01-01

Underway and in situ observations of surface ocean pCO2, combined with satellite data, were used to develop pCO2 regional algorithms to analyze the seasonal and interannual variability of surface ocean pCO2 and sea-air CO2 flux for five physically and biologically distinct regions of the eastern North American continental shelf: the South Atlantic Bight (SAB), the Mid-Atlantic Bight (MAB), the Gulf of Maine (GoM), Nantucket Shoals and Georges Bank (NS+GB), and the Scotian Shelf (SS). Temperature and dissolved inorganic carbon variability are the most influential factors driving the seasonality of pCO2. Estimates of the sea-air CO2 flux were derived from the available pCO2 data, as well as from the pCO2 reconstructed by the algorithm. Two different gas exchange parameterizations were used. The SS, GB+NS, MAB, and SAB regions are net sinks of atmospheric CO2 while the GoM is a weak source. The estimates vary depending on the use of surface ocean pCO2 from the data or algorithm, as well as with the use of the two different gas exchange parameterizations. Most of the regional estimates are in general agreement with previous studies when the range of uncertainty and interannual variability are taken into account. According to the algorithm, the average annual uptake of atmospheric CO2 by eastern North American continental shelf waters is found to be between 3.4 and 5.4 Tg C/yr (areal average of 0.7 to 1.0 mol CO2 /sq m/yr) over the period 2003-2010.

Dry deposition of gaseous oxidized mercury in Western Maryland.

PubMed

Castro, Mark S; Moore, Chris; Sherwell, John; Brooks, Steve B

2012-02-15

The purpose of this study was to directly measure the dry deposition of gaseous oxidized mercury (GOM) in western Maryland. Annual estimates were made using passive ion-exchange surrogate surfaces and a resistance model. Surrogate surfaces were deployed for seventeen weekly sampling periods between September 2009 and October 2010. Dry deposition rates from surrogate surfaces ranged from 80 to 1512 pgm(-2)h(-1). GOM dry deposition rates were strongly correlated (r(2)=0.75) with the weekly average atmospheric GOM concentrations, which ranged from 2.3 to 34.1 pgm(-3). Dry deposition of GOM could be predicted from the ambient air concentrations of GOM using this equation: GOM dry deposition (pgm(-2)h(-1))=43.2 × GOM concentration-80.3. Dry deposition velocities computed using GOM concentrations and surrogate surface GOM dry deposition rates, ranged from 0.2 to 1.7 cms(-1). Modeled dry deposition rates were highly correlated (r(2)=0.80) with surrogate surface dry deposition rates. Using the overall weekly average surrogate surface dry deposition rate (369 ± 340 pg m(-2)h(-1)), we estimated an annual GOM dry deposition rate of 3.2 μg m(-2)year(-1). Using the resistance model, we estimated an annual GOM dry deposition rate of 3.5 μg m(-2)year(-1). Our annual GOM dry deposition rates were similar to the dry deposition (3.3 μg m(-2)h(-1)) of gaseous elemental mercury (GEM) at our site. In addition, annual GOM dry deposition was approximately 1/2 of the average annual wet deposition of total mercury (7.7 ± 1.9 μg m(-2)year(-1)) at our site. Total annual mercury deposition from dry deposition of GOM and GEM and wet deposition was approximately 14.4 μg m(-2)year(-1), which was similar to the average annual litterfall deposition (15 ± 2.1 μg m(-2)year(-1)) of mercury, which was also measured at our site. Copyright © 2012 Elsevier B.V. All rights reserved.

Impact of Measurement Uncertainties on Receptor Modeling of Speciated Atmospheric Mercury.

PubMed

Cheng, I; Zhang, L; Xu, X

2016-02-09

Gaseous oxidized mercury (GOM) and particle-bound mercury (PBM) measurement uncertainties could potentially affect the analysis and modeling of atmospheric mercury. This study investigated the impact of GOM measurement uncertainties on Principal Components Analysis (PCA), Absolute Principal Component Scores (APCS), and Concentration-Weighted Trajectory (CWT) receptor modeling results. The atmospheric mercury data input into these receptor models were modified by combining GOM and PBM into a single reactive mercury (RM) parameter and excluding low GOM measurements to improve the data quality. PCA and APCS results derived from RM or excluding low GOM measurements were similar to those in previous studies, except for a non-unique component and an additional component extracted from the RM dataset. The percent variance explained by the major components from a previous study differed slightly compared to RM and excluding low GOM measurements. CWT results were more sensitive to the input of RM than GOM excluding low measurements. Larger discrepancies were found between RM and GOM source regions than those between RM and PBM. Depending on the season, CWT source regions of RM differed by 40-61% compared to GOM from a previous study. No improvement in correlations between CWT results and anthropogenic mercury emissions were found.

Impact of Measurement Uncertainties on Receptor Modeling of Speciated Atmospheric Mercury

PubMed Central

Cheng, I.; Zhang, L.; Xu, X.

2016-01-01

Gaseous oxidized mercury (GOM) and particle-bound mercury (PBM) measurement uncertainties could potentially affect the analysis and modeling of atmospheric mercury. This study investigated the impact of GOM measurement uncertainties on Principal Components Analysis (PCA), Absolute Principal Component Scores (APCS), and Concentration-Weighted Trajectory (CWT) receptor modeling results. The atmospheric mercury data input into these receptor models were modified by combining GOM and PBM into a single reactive mercury (RM) parameter and excluding low GOM measurements to improve the data quality. PCA and APCS results derived from RM or excluding low GOM measurements were similar to those in previous studies, except for a non-unique component and an additional component extracted from the RM dataset. The percent variance explained by the major components from a previous study differed slightly compared to RM and excluding low GOM measurements. CWT results were more sensitive to the input of RM than GOM excluding low measurements. Larger discrepancies were found between RM and GOM source regions than those between RM and PBM. Depending on the season, CWT source regions of RM differed by 40–61% compared to GOM from a previous study. No improvement in correlations between CWT results and anthropogenic mercury emissions were found. PMID:26857835

Gas hydrates of outer continental margins

DOE Office of Scientific and Technical Information (OSTI.GOV)

Kvenvolden, K.A.

1990-05-01

Gas hydrates are crystalline substances in which a rigid framework of water molecules traps molecules of gas, mainly methane. Gas-hydrate deposits are common in continental margin sediment in all major oceans at water depths greater than about 300 m. Thirty-three localities with evidence for gas-hydrate occurrence have been described worldwide. The presence of these gas hydrates has been inferred mainly from anomalous lacoustic reflectors seen on marine seismic records. Naturally occurring marine gas hydrates have been sampled and analyzed at about tensites in several regions including continental slope and rise sediment of the eastern Pacific Ocean and the Gulf ofmore » Mexico. Except for some Gulf of Mexico gas hydrate occurrences, the analyzed gas hydrates are composed almost exclusively of microbial methane. Evidence for the microbial origin of methane in gas hydrates includes (1) the inverse relation between methane occurence and sulfate concentration in the sediment, (2) the subparallel depth trends in carbon isotopic compositions of methane and bicarbonate in the interstitial water, and (3) the general range of {sup 13}C depletion ({delta}{sub PDB}{sup 13}C = {minus}90 to {minus}60 {per thousand}) in the methane. Analyses of gas hydrates from the Peruvian outer continental margin in particular illustrate this evidence for microbially generated methane. The total amount of methane in gas hydrates of continental margins is not known, but estimates of about 10{sup 16} m{sup 3} seem reasonable. Although this amount of methane is large, it is not yet clear whether methane hydrates of outer continental margins will ever be a significant energy resource; however, these gas hydrates will probably constitute a drilling hazard when outer continental margins are explored in the future.« less

75 FR 17156 - Gulf of Mexico, Outer Continental Shelf, Western Planning Area, Oil and Gas Lease Sale 215 (2010...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-04-05

... environmental assessment (EA) for proposed Gulf of Mexico Outer Continental Shelf (OCS) oil and gas Lease Sale... Environmental Impact Statement; Volumes I and II (Multisale EIS, OCS EIS/EA MMS 2007-018) and in the Gulf of...; Western Planning Area Sales 210, 215, and 218--Final Supplemental Environmental Impact Statement...

78 FR 76643 - Atlantic Wind Lease Sale 3 (ATLW3) Commercial Leasing for Wind Power on the Outer Continental...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-12-18

...: Nameplate capacity is the maximum rated electric output, expressed in MW, which the turbines of the wind facility under commercial operations can produce at their rated wind speed as designated by the turbine's...; MMAA104000] Atlantic Wind Lease Sale 3 (ATLW3) Commercial Leasing for Wind Power on the Outer Continental...

Tropospheric GOM at the Pic du Midi Observatory-Correcting Bias in Denuder Based Observations.

PubMed

Marusczak, Nicolas; Sonke, Jeroen E; Fu, Xuewu; Jiskra, Martin

2017-01-17

Gaseous elemental mercury (GEM, Hg) emissions are transformed to divalent reactive Hg (RM) forms throughout the troposphere and stratosphere. RM is often operationally quantified as the sum of particle bound Hg (PBM) and gaseous oxidized Hg (GOM). The measurement of GOM and PBM is challenging and under mounting criticism. Here we intercompare six months of automated GOM and PBM measurements using a Tekran (TK) KCl-coated denuder and quartz regenerable particulate filter method (GOM TK , PBM TK , and RM TK ) with RM CEM collected on cation exchange membranes (CEMs) at the high altitude Pic du Midi Observatory. We find that RM TK is systematically lower by a factor of 1.3 than RM CEM . We observe a significant relationship between GOM TK (but not PBM TK ) and Tekran flush TK blanks suggesting significant loss (36%) of labile GOM TK from the denuder or inlet. Adding the flush TK blank to RM TK results in good agreement with RM CEM (slope = 1.01, r 2 = 0.90) suggesting we can correct bias in RM TK and GOM TK . We provide a bias corrected (*) Pic du Midi data set for 2012-2014 that shows GOM* and RM* levels in dry free tropospheric air of 198 ± 57 and 229 ± 58 pg m -3 which agree well with in-flight observed RM and with model based GOM and RM estimates.

Seismic Interferometry of Gulf of Mexico Basin Opening (GUMBO) Data: Extraction of Body and Surface Waves with a Mixed-Mode Array

NASA Astrophysics Data System (ADS)

Thangraj, J. S.; Quiros, D.; Pulliam, J.

2017-12-01

The Gulf of Mexico (GoM) is a relative small oceanic basin that formed by rifting between the continental blocks of North America and Yucatan in the Middle to Late Jurassic. Following the breakup, seafloor spreading continued until the Early Cretaceous. Since then, subsidence and sedimentation have shaped the GoM margin that we see today. To better understand the opening of the GoM, a long-offset (307 km) seismic refraction line was acquired in 2010. The transect was located on the northwest GoM margin, and consisted of several types of instruments. This mixed-mode array combined 31 ocean bottom seismographs (OBS), 412 high-frequency instruments (4.5 Hz geophones with RefTek 125A "Texan" digitizers) and 12 broadband stations. The R/V Iron Cat provided the airgun source used in the refraction experiment. The airgun generated 2028 shots in a period of 2.5 days which were recorded by the entire array. The airgun-generated seismic energy was clearly visible on the OBS recordings, however its amplitude was too low to be discerned on most of the onshore stations. In fact, this energy was only visible on Texan stations 1-50 (station 1 is located at the coast), extending 18 km inland, limiting the extend of the velocity model that can be obtained. Here, we apply seismic interferometry techniques to the 2.5 days of continuous data recorded by the Texan array with the goal of extending the spatial range for which the airgun-generated seismic energy can be observed. Preliminary results show that by treating the 2.5 days of continuously recorded airgun data as ambient noise, and applying time-domain cross-correlation, we can observe energy propagating 50 to 70 km inland with apparent velocities of 1800 - 2200 ms-1. These velocities agree with the compressional seismic velocity for the top 5 km of sediments under the GoM obtained from the OBS records, suggesting that we are observing compressional energy in the virtual source gathers (VSG). We also observe arrivals in the VSG that exhibit dispersive behavior, which we interpret to be Rayleigh waves. Current efforts are focused on extending the spatial range of the airgun-generated seismic energy further inland (> 70 km) by creating more VSG, to obtain a body wave velocity model along the transect. Similarly, we are inverting the Rayleigh waves in the VSG to obtain a shear wave velocity model.

Characterization of Microbial Community Structure in Gulf of Mexico Gas Hydrates: Comparative Analysis of DNA- and RNA-Derived Clone Libraries

PubMed Central

Mills, Heath J.; Martinez, Robert J.; Story, Sandra; Sobecky, Patricia A.

2005-01-01

The characterization of microbial assemblages within solid gas hydrate, especially those that may be physiologically active under in situ hydrate conditions, is essential to gain a better understanding of the effects and contributions of microbial activities in Gulf of Mexico (GoM) hydrate ecosystems. In this study, the composition of the Bacteria and Archaea communities was determined by 16S rRNA phylogenetic analyses of clone libraries derived from RNA and DNA extracted from sediment-entrained hydrate (SEH) and interior hydrate (IH). The hydrate was recovered from an exposed mound located in the northern GoM continental slope with a hydrate chipper designed for use on the manned-submersible Johnson Sea Link (water depth, 550 m). Previous geochemical analyses indicated that there was increased metabolic activity in the SEH compared to the IH layer (B. N. Orcutt, A. Boetius, S. K. Lugo, I. R. Macdonald, V. A. Samarkin, and S. Joye, Chem. Geol. 205:239-251). Phylogenetic analysis of RNA- and DNA-derived clones indicated that there was greater diversity in the SEH libraries than in the IH libraries. A majority of the clones obtained from the metabolically active fraction of the microbial community were most closely related to putative sulfate-reducing bacteria and anaerobic methane-oxidizing archaea. Several novel bacterial and archaeal phylotypes for which there were no previously identified closely related cultured isolates were detected in the RNA- and DNA-derived clone libraries. This study was the first phylogenetic analysis of the metabolically active fraction of the microbial community extant in the distinct SEH and IH layers of GoM gas hydrate. PMID:15933026

Molecular characterization of benthic foraminifera communities from the Northeastern Gulf of Mexico shelf and slope following the Deepwater Horizon event

NASA Astrophysics Data System (ADS)

Moss, Joseph A.; McCurry, Chelsea; Schwing, Patrick; Jeffrey, Wade H.; Romero, Isabel C.; Hollander, David J.; Snyder, Richard A.

2016-09-01

Benthic foraminifera are globally distributed protozoa in the world's oceans, which have been used as ecological indicators in both current and palaeo oceanography. The ecological properties and distribution of these organisms in various regions of the Gulf of Mexico (GOM) have been evaluated using microscopy; however molecular approaches for these purposes have been limited, especially in deeper regions. The BP Deepwater Horizon oil well failure in the northern Gulf of Mexico highlighted the need to better understand the distribution and abundance of these organisms relative to environmental factors and ecosystem perturbations such as the oil spill. Sediment samples were collected using a Shipek grab along transects on the northwest Florida GOM shelf (18-270 m depth). Clone libraries were developed from PCR amplified 18S rDNA genes for sequence analysis. Analysis of random clones from libraries were used as a proxy for community structure (presence and relative abundance) to document the spatial and temporal dynamics of benthic foraminifera on the Northwest Florida Shelf in the NE GOM shelf. Additional continental slope samples (200-1600 m depth) were obtained by a multicorer and treated in similar fashion. Mean species diversity in this study (H=2.49-3.36), agreed with pre-DWH event estimates, however the dominant agglutinated species in the deep-water samples did not match previous studies. Additionally, the dominant calcareous taxa from this study such as Allogromida sp. and Psammophaga sp., were inconsistent with previous reports. The dominant taxa in both coastal and deep-water sites include Glabratellina sp., Trochammina hadai, and Trochammina sp., and Textularia sagittula and Bathysiphon argenteus as well as members of genera Astrammina, Bolivina, Cibicides and Cibicidoides.

General Outcome Measures for Verbal Operants

ERIC Educational Resources Information Center

Kubina, Richard M., Jr.; Wolfe, Pamela; Kostewicz, Douglas E.

2009-01-01

A general outcome measure (GOM) can be used to show progress towards a long-term goal. GOMs should sample domains of behavior across ages, be sensitive to change over time, be inexpensive and easy to use, and facilitate decision making. Skinner's (1957) analysis of verbal behavior may benefit from the development of GOM. To develop GOM, we…

Impacts of Outer Continental Shelf (OCS) development on recreation and tourism. Volume 5. Program logic manual

DOE Office of Scientific and Technical Information (OSTI.GOV)

Not Available

The final report for the project is presented in five volumes. This volume is the Programmer's Manual. It covers: a system overview, attractiveness component of gravity model, trip-distribution component of gravity model, economic-effects model, and the consumer-surplus model. The project sought to determine the impact of Outer Continental Shelf development on recreation and tourism.

Revised oil-spill risk analysis: Beaufort Sea outer continental shelf lease sale 170. Final report

DOE Office of Scientific and Technical Information (OSTI.GOV)

Anderson, C.; Johnson, W.; Marshall, C.

1997-11-01

The Federal Government has proposed to offer Outer Continental Shelf lands in the Beaufort Sea for oil and gas leasing. Because oil spills may occur from activities associated with offshore oil production, the Minerals Management Service conducts a formal risk assessment. This report summarizes results of oil-spill risk analysis conducted for the proposed Beaufort Sea lease sale.

75 FR 17159 - Notice of Availability of the Proposed Notice of Sale (NOS) for Outer Continental Shelf (OCS) Oil...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-04-05

... Notice of Sale (NOS) for Outer Continental Shelf (OCS) Oil and Gas Lease Sale 215 in the Western Planning... matter of information to the public. With regard to oil and gas leasing on the OCS, the Secretary of the... NOS for Sale 215 and a ``Proposed Notice of Sale Package'' containing information essential to...

76 FR 52344 - Notice of Availability of the Proposed Notice of Sale (NOS) for Outer Continental Shelf (OCS) Oil...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-08-22

... Availability of the Proposed Notice of Sale (NOS) for Outer Continental Shelf (OCS) Oil and Gas Lease Sale 218... matter of information to the public. With regard to oil and gas leasing on the OCS, the Secretary of the... NOS for Sale 218 and a ``Proposed Notice of Sale Package'' containing information essential to...

77 FR 43355 - Notice of Availability of the Proposed Notice of Sale for Outer Continental Shelf (OCS) Oil and...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-07-24

... Proposed Notice of Sale for Outer Continental Shelf (OCS) Oil and Gas Lease Sale 229 in the Western...: Notice of Availability of the Proposed Notice of Sale for Proposed Sale 229. SUMMARY: BOEM announces the availability of the Proposed Notice of Sale (NOS) for proposed Sale 229 in the WPA. This sale will be the first...

77 FR 4360 - Notice of Availability of the Proposed Notice of Sale for Outer Continental Shelf (OCS) Oil and...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-01-27

... Proposed Notice of Sale for Outer Continental Shelf (OCS) Oil and Gas Lease Sale 216/222 in the Central...: Notice of Availability of the Proposed Notice of Sale for Proposed Sale 216/222. SUMMARY: BOEM announces the availability of the proposed Notice of Sale (NOS) for proposed Sale 216/222 in the CPA. This...

Mineral resource management of the Outer Continental Shelf : leasing procedures, evaluation of resources, and supervision of production operations on leased lands of the Outer Continental Shelf

USGS Publications Warehouse

Adams, Maurice V.; John, C.B.; Kelly, R.F.; LaPointe, A.E.; Meurer, R.W.

1975-01-01

An important function of the Geological Survey is the evaluation and management of the mineral resources of the Outer Continental Shelf, particularly with respect to oil and gas, salt, and sulfur. Production of oil and gas from the Outer Continental Shelf of the United States has increased substantially over the past 20 years and represents an increasing percentage of total United States production. As discovery of major onshore production of oil and gas has become more difficult, the search has moved into the surrounding waters where submerged sedimentary formations are conducive to the accumulation of oil and gas. Increased energy demands of recent years have accelerated the pace of offshore operations with a corresponding improvement in technology as exploration and development have proceeded farther from shore and into deeper water. While improved technology and enforcement of more stringent regulations have made offshore operations safer, it is unrealistic to believe that completely accident-free operations can ever be achieved. Only slightly more than six percent of the world's continental terrace is adjacent to the United States, but less than one percent has been explored for oil and gas. Since the lead time for the development of offshore oil and gas resources can be as much as a decade, they do not provide an immediate energy supply but should be viewed in the light of a near-term source with a potential of becoming a medium-range source of supply pending the development of alternative energy sources. Revenues from the Outer Continental Shelf are deposited to the general fund of the United States Treasury. A major portion of these funds is allocated to the Land and Water Conservation Fund, the largest Federal grant-in-aid program of assistance to States, counties, and cities for the acquisition and development of public parks, open space, and recreation lands and water.

Uncertainty Assessment of Gaseous Oxidized Mercury Measurements Collected by Atmospheric Mercury Network.

PubMed

Cheng, Irene; Zhang, Leiming

2017-01-17

Gaseous oxidized mercury (GOM) measurement uncertainties undoubtedly impact the understanding of mercury biogeochemical cycling; however, there is a lack of consensus on the uncertainty magnitude. The numerical method presented in this study provides an alternative means of estimating the uncertainties of previous GOM measurements. Weekly GOM in ambient air was predicted from measured weekly mercury wet deposition using a scavenging ratio approach, and compared against field measurements of 2-4 hly GOM to estimate the measurement biases of the Tekran speciation instruments at 13 Atmospheric Mercury Network (AMNet) sites. Multiyear average GOM measurements were estimated to be biased low by more than a factor of 2 at six sites, between a factor of 1.5 and 1.8 at six other sites, and below a factor of 1.3 at one site. The differences between predicted and observed were significantly larger during summer than other seasons potentially because of higher ozone concentrations that may interfere with GOM sampling. The analysis data collected over six years at multiple sites suggests a systematic bias in GOM measurements, supporting the need for further investigation of measurement technologies and identifying the chemical composition of GOM.

Impacts of Outer Continental Shelf (OCS) development on recreation and tourism. Volume 4. User's manual

DOE Office of Scientific and Technical Information (OSTI.GOV)

Not Available

The final report for the project is presented in five volumes. The project sought to determine the impact of Outer Continental Shelf development on recreation and tourism in California. This volume is the User's Guide. It includes the following topics: Introduction and Summary Guide; Input Data Files; Gravity Model Programs; Economic Effects Model Programs; Consumer Surplus Model Programs; References; and Appendices.

Deciphering potential chemical compounds of gaseous oxidized mercury in Florida, USA

NASA Astrophysics Data System (ADS)

Huang, Jiaoyan; Miller, Matthieu B.; Edgerton, Eric; Sexauer Gustin, Mae

2017-02-01

The highest mercury (Hg) wet deposition in the United States of America (USA) occurs along the Gulf of Mexico, and in the southern and central Mississippi River Valley. Gaseous oxidized Hg (GOM) is thought to be a major contributor due to high water solubility and reactivity. Therefore, it is critical to understand concentrations, potential for wet and dry deposition, and GOM compounds present in the air. Concentrations and dry-deposition fluxes of GOM were measured and calculated for Naval Air Station Pensacola Outlying Landing Field (OLF) in Florida using data collected by a Tekran® 2537/1130/1135, the University of Nevada Reno Reactive Mercury Active System (UNRRMAS) with cation exchange and nylon membranes, and the Aerohead samplers that use cation-exchange membranes to determine dry deposition. Relationships with Tekran®-derived data must be interpreted with caution, since the GOM concentrations measured are biased low depending on the chemical compounds in air and interferences with water vapor and ozone.Criteria air pollutants were concurrently measured. This allowed for comparison and better understanding of GOM.In addition to other methods previously applied at OLF, use of the UNRRMAS provided a platform for determination of the chemical compounds of GOM in the air. Results from nylon membranes with thermal desorption analyses indicated seven GOM compounds in this area, including HgBr2, HgCl2, HgO, Hg-nitrogen and sulfur compounds, and two unknown compounds. This indicates that the site is influenced by different gaseous phase reactions and sources. Using back-trajectory analysis during a high-GOM event related to high CO, but average SO2, indicated air parcels moved from the free troposphere and across Arkansas, Mississippi, and Alabama at low elevation (< 300 m). This event was initially characterized by HgBr2, followed by a mixture of GOM compounds. Overall, GOM chemistry indicates oxidation reactions with local mobile source pollutants and long-range transport.In order to develop methods to measure GOM concentrations and chemistry, and model dry-deposition processes, the actual GOM compounds need to be known, as well as their corresponding physicochemical properties, such as Henry's Law constants.

Investigation of processes controlling summertime gaseous elemental mercury oxidation at midlatitudinal marine, coastal, and inland sites

NASA Astrophysics Data System (ADS)

Ye, Zhuyun; Mao, Huiting; Lin, Che-Jen; Kim, Su Youn

2016-07-01

A box model incorporating a state-of-the-art chemical mechanism for atmospheric mercury (Hg) cycling was developed to investigate the oxidation of gaseous elemental mercury (GEM) at three locations in the northeastern United States: Appledore Island (AI; marine), Thompson Farm (TF; coastal, rural), and Pack Monadnock (PM; inland, rural, elevated). The chemical mechanism in this box model included the most up-to-date Hg and halogen chemistry. As a result, the box model was able to simulate reasonably the observed diurnal cycles of gaseous oxidized mercury (GOM) and chemical speciation bearing distinct differences between the three sites. In agreement with observations, simulated GOM diurnal cycles at AI and TF showed significant daytime peaks in the afternoon and nighttime minimums compared to flat GOM diurnal cycles at PM. Moreover, significant differences in the magnitude of GOM diurnal amplitude (AI > TF > PM) were captured in modeled results. At the coastal and inland sites, GEM oxidation was predominated by O3 and OH, contributing 80-99 % of total GOM production during daytime. H2O2-initiated GEM oxidation was significant (˜ 33 % of the total GOM) at the inland site during nighttime. In the marine boundary layer (MBL) atmosphere, Br and BrO became dominant GEM oxidants, with mixing ratios reaching 0.1 and 1 pptv, respectively, and contributing ˜ 70 % of the total GOM production during midday, while O3 dominated GEM oxidation (50-90 % of GOM production) over the remaining day when Br and BrO mixing ratios were diminished. The majority of HgBr produced from GEM+Br was oxidized by NO2 and HO2 to form brominated GOM species. Relative humidity and products of the CH3O2+BrO reaction possibly significantly affected the mixing ratios of Br or BrO radicals and subsequently GOM formation. Gas-particle partitioning could potentially be important in the production of GOM as well as Br and BrO at the marine site.

Outer continental shelf, Beaufort Sea, oil and gas lease sale 170 (proposed notice of sale)

DOE Office of Scientific and Technical Information (OSTI.GOV)

NONE

1997-12-31

The Minerals Management Service (MMS) is issuing this proposed Notice of Sale under the Outer Continental Shelf (OCS) Lands Act (43 U.S.C. 1331-1356, as amended) and the regulations issued thereunder (30 CFR Part 256). A `Sale Notice Package,` containing this Notice and several supporting and essential documents referenced in the Notice, is available from the MMS Alaska OCS Regional Office Public Information Unit.

An oilspill risk analysis for the North Atlantic outer continental shelf lease area

USGS Publications Warehouse

Smith, Richard Allmon; Slack, James Richard; Davis, Robert K.

1976-01-01

The Federal Government has proposed to lease 1,172,795 acres of Outer Continental Shelf (OCS) lands on Georges Bank off the New England Coast for oil and gas development. Estimated recoverable petroleum resources for the proposed 206 tract sale area range from 180 to 650 million barrels. Contingent upon actual discovery of this quantity of oil, production is expected to span a period of about 20 years. An oilspill risk analysis was conducted to determine relative environmental hazards of developing oil in the North Atlantic Outer Continental Shelf lease area. The study analyzed probability of spill occurrence, likely path of pollutants from spills, and locations in space and time of recreational and biological resources likely to be vulnerable. These results are combined to yield estimates of the overall oilspill risk associated with development of the lease area. (Woodard-USGS)

Gaseous oxidized mercury dry deposition measurements in the southwestern USA: a comparison between Texas, eastern Oklahoma, and the Four Corners area.

PubMed

Sather, Mark E; Mukerjee, Shaibal; Allen, Kara L; Smith, Luther; Mathew, Johnson; Jackson, Clarence; Callison, Ryan; Scrapper, Larry; Hathcoat, April; Adam, Jacque; Keese, Danielle; Ketcher, Philip; Brunette, Robert; Karlstrom, Jason; Van der Jagt, Gerard

2014-01-01

Gaseous oxidized mercury (GOM) dry deposition measurements using aerodynamic surrogate surface passive samplers were collected in central and eastern Texas and eastern Oklahoma, from September 2011 to September 2012. The purpose of this study was to provide an initial characterization of the magnitude and spatial extent of ambient GOM dry deposition in central and eastern Texas for a 12-month period which contained statistically average annual results for precipitation totals, temperature, and wind speed. The research objective was to investigate GOM dry deposition in areas of Texas impacted by emissions from coal-fired utility boilers and compare it with GOM dry deposition measurements previously observed in eastern Oklahoma and the Four Corners area. Annual GOM dry deposition rate estimates were relatively low in Texas, ranging from 0.1 to 0.3 ng/m(2)h at the four Texas monitoring sites, similar to the 0.2 ng/m(2)h annual GOM dry deposition rate estimate recorded at the eastern Oklahoma monitoring site. The Texas and eastern Oklahoma annual GOM dry deposition rate estimates were at least four times lower than the highest annual GOM dry deposition rate estimate previously measured in the more arid bordering western states of New Mexico and Colorado in the Four Corners area.

Atmospheric mercury speciation dynamics at the high-altitude Pic du Midi Observatory, southern France

NASA Astrophysics Data System (ADS)

Fu, Xuewu; Marusczak, Nicolas; Heimbürger, Lars-Eric; Sauvage, Bastien; Gheusi, François; Prestbo, Eric M.; Sonke, Jeroen E.

2016-05-01

Continuous measurements of atmospheric gaseous elemental mercury (GEM), particulate bound mercury (PBM) and gaseous oxidized mercury (GOM) at the high-altitude Pic du Midi Observatory (PDM Observatory, 2877 m a.s.l.) in southern France were made from November 2011 to November 2012. The mean GEM, PBM and GOM concentrations were 1.86 ng m-3, 14 pg m-3 and 27 pg m-3, respectively and we observed 44 high PBM (peak PBM values of 33-98 pg m-3) and 61 high GOM (peak GOM values of 91-295 pg m-3) events. The high PBM events occurred mainly in cold seasons (winter and spring) whereas high GOM events were mainly observed in the warm seasons (summer and autumn). In cold seasons the maximum air mass residence times (ARTs) associated with high PBM events were observed in the upper troposphere over North America. The ratios of high PBM ARTs to total ARTs over North America, Europe, the Arctic region and Atlantic Ocean were all elevated in the cold season compared to the warm season, indicating that the middle and upper free troposphere of the Northern Hemisphere may be more enriched in PBM in cold seasons. PBM concentrations and PBM / GOM ratios during the high PBM events were significantly anti-correlated with atmospheric aerosol concentrations, air temperature and solar radiation, suggesting in situ formation of PBM in the middle and upper troposphere. We identified two distinct types of high GOM events with the GOM concentrations positively and negatively correlated with atmospheric ozone concentrations, respectively. High GOM events positively correlated with ozone were mainly related to air masses from the upper troposphere over the Arctic region and middle troposphere over the temperate North Atlantic Ocean, whereas high GOM events anti-correlated with ozone were mainly related to air masses from the lower free troposphere over the subtropical North Atlantic Ocean. The ARTs analysis demonstrates that the lower and middle free troposphere over the North Atlantic Ocean was the largest source region of atmospheric GOM at the PDM Observatory. The ratios of high GOM ARTs to total ARTs over the subtropical North Atlantic Ocean in summer were significantly higher than those over the temperate and sub-arctic North Atlantic Ocean as well as that over the North Atlantic Ocean in other seasons, indicating abundant in situ oxidation of GEM to GOM in the lower free troposphere over the subtropical North Atlantic Ocean in summer.

An oilspill risk analysis for the Mid-Atlantic Outer Continental Shelf lease area

USGS Publications Warehouse

Smith, Richard Allmon; Slack, James Richard; Davis, Robert K.

1976-01-01

An oilspill risk analysis was conducted to determine relative environmental impacts of developing oil in different regions of the Mid-Atlantic Outer Continental Shelf lease area. The study analyzed probability of spills, likely path of pollutants from spills, and locations in space and time of recreational and biological resources likely to be vulnerable. These results are combined to yield estimates of the overall oilspill risk associated with development of the lease area. (Woodard-USGS)

Gaseous Oxidized Mercury Dry Deposition Measurements in the Southwestern USA: A Comparison between Texas, Eastern Oklahoma, and the Four Corners Area

PubMed Central

Sather, Mark E.; Allen, Kara L.; Smith, Luther; Mathew, Johnson; Jackson, Clarence; Callison, Ryan; Scrapper, Larry; Hathcoat, April; Adam, Jacque; Keese, Danielle; Brunette, Robert; Karlstrom, Jason; Van der Jagt, Gerard

2014-01-01

Gaseous oxidized mercury (GOM) dry deposition measurements using aerodynamic surrogate surface passive samplers were collected in central and eastern Texas and eastern Oklahoma, from September 2011 to September 2012. The purpose of this study was to provide an initial characterization of the magnitude and spatial extent of ambient GOM dry deposition in central and eastern Texas for a 12-month period which contained statistically average annual results for precipitation totals, temperature, and wind speed. The research objective was to investigate GOM dry deposition in areas of Texas impacted by emissions from coal-fired utility boilers and compare it with GOM dry deposition measurements previously observed in eastern Oklahoma and the Four Corners area. Annual GOM dry deposition rate estimates were relatively low in Texas, ranging from 0.1 to 0.3 ng/m2h at the four Texas monitoring sites, similar to the 0.2 ng/m2h annual GOM dry deposition rate estimate recorded at the eastern Oklahoma monitoring site. The Texas and eastern Oklahoma annual GOM dry deposition rate estimates were at least four times lower than the highest annual GOM dry deposition rate estimate previously measured in the more arid bordering western states of New Mexico and Colorado in the Four Corners area. PMID:24955412

Comparison of gaseous oxidized Hg measured by KCl-coated denuders, and nylon and cation exchange membranes.

PubMed

Huang, Jiaoyan; Miller, Matthieu B; Weiss-Penzias, Peter; Gustin, Mae Sexauer

2013-07-02

The chemical compounds that make up gaseous oxidized mercury (GOM) in the atmosphere, and the reactions responsible for their formation, are not well understood. The limitations and uncertainties associated with the current method applied to measure these compounds, the KCl-coated denuder, are not known due to lack of calibration and testing. This study systematically compared the uptake of specific GOM compounds by KCl-coated denuders with that collected using nylon and cation exchange membranes in the laboratory and field. In addition, a new method for identifying different GOM compounds using thermal desorption is presented. Different GOM compounds (HgCl2, HgBr2, and HgO) were found to have different affinities for the denuder surface and the denuder underestimated each of these compounds. Membranes measured 1.3 to 3.7 times higher GOM than denuders in laboratory and field experiments. Cation exchange membranes had the highest collection efficiency. Thermodesorption profiles for the release of GOM compounds from the nylon membrane were different for HgO versus HgBr2 and HgCl2. Application of the new field method for collection and identification of GOM compounds demonstrated these vary as a function of location and time of year. Understanding the chemistry of GOM across space and time has important implications for those developing policy regarding this environmental contaminant.

Uncertainties of Gaseous Oxidized Mercury Measurements Using KCl-Coated Denuders, Cation-Exchange Membranes, and Nylon Membranes: Humidity Influences.

PubMed

Huang, Jiaoyan; Gustin, Mae Sexauer

2015-05-19

Quantifying the concentration of gaseous oxidized mercury (GOM) and identifying the chemical compounds in the atmosphere are important for developing accurate local, regional, and global biogeochemical cycles. The major hypothesis driving this work was that relative humidity affects collection of GOM on KCl-coated denuders and nylon membranes, both currently being applied to measure GOM. Using a laboratory manifold system and ambient air, GOM capture efficiency on 3 different collection surfaces, including KCl-coated denuders, nylon membranes, and cation-exchange membranes, was investigated at relative humidity ranging from 25 to 75%. Recovery of permeated HgBr2 on KCl-coated denuders declined by 4-60% during spikes of relative humidity (25 to 75%). When spikes were turned off GOM recoveries returned to 60 ± 19% of permeated levels. In some cases, KCl-coated denuders were gradually passivated over time after additional humidity was applied. In this study, GOM recovery on nylon membranes decreased with high humidity and ozone concentrations. However, additional humidity enhanced GOM recovery on cation-exchange membranes. In addition, reduction and oxidation of elemental mercury during experiments was observed. The findings in this study can help to explain field observations in previous studies.

Toward a quantitative and empirical dissolved organic carbon budget for the Gulf of Maine, a semienclosed shelf sea

NASA Astrophysics Data System (ADS)

Balch, William; Huntington, Thomas; Aiken, George; Drapeau, David; Bowler, Bruce; Lubelczyk, Laura; Butler, Kenna

2016-02-01

A time series of organic carbon export from Gulf of Maine (GoM) watersheds was compared to a time series of biological, chemical, bio-optical, and hydrographic properties, measured across the GoM between Yarmouth, NS, Canada, and Portland, ME, U.S. Optical proxies were used to quantify the dissolved organic carbon (DOC) and particulate organic carbon in the GoM. The Load Estimator regression model applied to river discharge data demonstrated that riverine DOC export (and its decadal variance) has increased over the last 80 years. Several extraordinarily wet years (2006-2010) resulted in a massive pulse of chromophoric dissolved organic matter (CDOM; proxy for DOC) into the western GoM along with unidentified optically scattering material (<0.2 µm diameter). A survey of DOC in the GoM and Scotian Shelf showed the strong influence of the Gulf of Saint Lawrence on the DOC that enters the GoM. A deep plume of CDOM-rich water was observed near the coast of Maine which decreased in concentration eastward. The Forel-Ule color scale was derived and compared to the same measurements made in 1912-1913 by Henry Bigelow. Results show that the GoM has yellowed in the last century, particularly in the region of the extension of the Eastern Maine Coastal Current. Time lags between DOC discharge and its appearance in the GoM increased with distance from the river mouths. Algae were also a significant source of DOC but not CDOM. Gulf-wide algal primary production has decreased. Increases in precipitation and DOC discharge to the GoM are predicted over the next century.

Toward a quantitative and empirical dissolved organic carbon budget for the Gulf of Maine, a semienclosed shelf sea

USGS Publications Warehouse

Balch, William; Huntington, Thomas G.; Aiken, George R.; Drapeau, David; Bowler, Bruce; Lubelczyk, Laura; Butler, Kenna D.

2016-01-01

A time series of organic carbon export from Gulf of Maine (GoM) watersheds was compared to a time series of biological, chemical, bio-optical, and hydrographic properties, measured across the GoM between Yarmouth, NS, Canada, and Portland, ME, U.S. Optical proxies were used to quantify the dissolved organic carbon (DOC) and particulate organic carbon in the GoM. The Load Estimator regression model applied to river discharge data demonstrated that riverine DOC export (and its decadal variance) has increased over the last 80 years. Several extraordinarily wet years (2006–2010) resulted in a massive pulse of chromophoric dissolved organic matter (CDOM; proxy for DOC) into the western GoM along with unidentified optically scattering material (<0.2 μm diameter). A survey of DOC in the GoM and Scotian Shelf showed the strong influence of the Gulf of Saint Lawrence on the DOC that enters the GoM. A deep plume of CDOM-rich water was observed near the coast of Maine which decreased in concentration eastward. The Forel-Ule color scale was derived and compared to the same measurements made in 1912–1913 by Henry Bigelow. Results show that the GoM has yellowed in the last century, particularly in the region of the extension of the Eastern Maine Coastal Current. Time lags between DOC discharge and its appearance in the GoM increased with distance from the river mouths. Algae were also a significant source of DOC but not CDOM. Gulf-wide algal primary production has decreased. Increases in precipitation and DOC discharge to the GoM are predicted over the next century.

An Analysis of Artificial Reef Fish Community Structure along the Northwestern Gulf of Mexico Shelf: Potential Impacts of “Rigs-to-Reefs” Programs

PubMed Central

Ajemian, Matthew J.; Wetz, Jennifer J.; Shipley-Lozano, Brooke; Shively, J. Dale; Stunz, Gregory W.

2015-01-01

Artificial structures are the dominant complex marine habitat type along the northwestern Gulf of Mexico (GOM) shelf. These habitats can consist of a variety of materials, but in this region are primarily comprised of active and reefed oil and gas platforms. Despite being established for several decades, the fish communities inhabiting these structures remain poorly investigated. Between 2012 and 2013 we assessed fish communities at 15 sites using remotely operated vehicles (ROVs). Fish assemblages were quantified from standing platforms and an array of artificial reef types (Liberty Ships and partially removed or toppled platforms) distributed over the Texas continental shelf. The depth gradient covered by the surveys (30–84 m) and variability in structure density and relief also permitted analyses of the effects of these characteristics on fish richness, diversity, and assemblage composition. ROVs captured a variety of species inhabiting these reefs from large transient piscivores to small herbivorous reef fishes. While structure type and relief were shown to influence species richness and community structure, major trends in species composition were largely explained by the bottom depth where these structures occurred. We observed a shift in fish communities and relatively high diversity at approximately 60 m bottom depth, confirming trends observed in previous studies of standing platforms. This depth was also correlated with some of the largest Red Snapper captured on supplementary vertical longline surveys. Our work indicates that managers of artificial reefing programs (e.g., Rigs-to-Reefs) in the GOM should carefully consider the ambient environmental conditions when designing reef sites. For the Texas continental shelf, reefing materials at a 50–60 m bottom depth can serve a dual purpose of enhancing diving experiences and providing the best potential habitat for relatively large Red Snapper. PMID:25954943

Quaternary seismic stratigraphy and paleoenvironments on the continental shelf of the East China Sea

NASA Astrophysics Data System (ADS)

Liu, Zhen-Xia; Berne, Serge; Saito, Yoshiki; Lericolais, G.; Marsset, T.

2000-08-01

Paleoenvironments and stratigraphy have been interpreted from 4380 km of seismic profiling collected during a geological and geophysical cruise on the continental shelf of the East China Sea (ECS) undertaken in 1996. The geophysical data are correlated with a borehole situated on the outer shelf obtained by Shanghai Marine Geology Bureau, indicating that six seismic units have been preserved since oxygen-isotope stage 6, including four regressive-transgressive cycles. Seismic units U2, U3+U4+U5, U6, and U7 are interpreted to correspond respectively to oxygen-isotope stages 1, 3, 5, and 6, implying that sediment partitioning and sequence architecture in the ECS have been controlled by glacio-eustasy and global climate changes. Alternating continental and marine strata corresponding to glaciation and interglaciation are well preserved on the outer shelf of the ECS. Most of the cold environment strata, which formed on the outer shelf during oxygen-isotope stages 2 and 4, are too thin to be recognized on SIG 600J because of resolution, but corresponding erosion surfaces exist. Seismic unit U7 is widespread over the shelf, extending to the continental edge and showing little variation in thickness, as the regression was pronounced and lasted a long time. Thus, U7 can be used as a marker layer for correlation of Quaternary strata on the shelf of the ECS. Post-glacial transgression is obvious in the ECS. Marine strata with varied thickness were developed in the shallow sea of the inner shelf, thinning toward the outer shelf. The continental shelf of the ECS has been influenced by Pacific tide-wave systems for a long time, forming tidal sand-ridge sequences, developed during transgressions, corresponding to oxygen-isotope stages 7 (or 9), 5, 3 and 1.

Mexican Ridges passive margin foldbelt of western Gulf of Mexico detached along the top of an extensive, Oligocene mass transport complex

NASA Astrophysics Data System (ADS)

Fick, A.; Mann, P.

2016-12-01

The Mexican Ridges fold-thrust belt (MRFTB) is a 110-210-km-wide and 500-600-km long passive margin, deep-water fold belt fringing the eastern Mexico continental shelf and deepwater western Gulf of Mexico (WGOM). Previous workers determined: 1) that the MRFTB formed in response to multiple gravity sliding events along multiple, Paleogene shale horizons during the Neogene and 2) that down-dip, east-west shortening ranges from 12-22 km in the deep western GOM basin is paired with updip extension of 9-10 km along the Mexican shelf. We have used a grid of 9,440 km's of 2D seismic lines tied to 2 wells to better constrain the detachment underlying the MRFTB. In the northern fold belt, fault detachment and detachment folds in the competent Neogene stratigraphy are cored by a ductile wedge of finer-grained Oligocene sediment ranging in thickness from 0-900 meters. The wedge covers approximately 81,750 km2 and extends 300 kilometers from its onlap onto the Eocene shelf to its downdip pinchout in the deepwater GOM basin. Previous workers have interpreted the Oligocene strata coring the folds to be composed of finer grained sediments with some chaotic seismic facies or homogeneous shales but have not mapped this detachment surface in detail. Our new 2D seismic reflection data tied to wells shows that the basal detachment of the MRFTB is a thickening-landward, wedge of stacked, fine-grained mass transport complexes (MTCs). This Oligocene aged MTC has experienced significant internal deformation in the proximal shelf area while its depositional facies are well preserved in the more distal deepwater areas of the GOM. Elevated pore and fluid pressure in the MTC complex may have contributed to its role as a regional detachment underlying the Mexican Ridges fold-thrust belt along with defining the regional, lobate geometry of the MRFTB.

30 CFR 291.1 - What is MMS's authority to collect information?

Code of Federal Regulations, 2011 CFR

2011-07-01

..., DEPARTMENT OF THE INTERIOR APPEALS OPEN AND NONDISCRIMINATORY ACCESS TO OIL AND GAS PIPELINES UNDER THE OUTER... been denied open and nondiscriminatory access to Outer Continental Shelf (OCS) pipelines as sections of...

77 FR 61633 - Information Collection: Renewable Energy and Alternate Uses of Existing Facilities on the Outer...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-10-10

...] Information Collection: Renewable Energy and Alternate Uses of Existing Facilities on the Outer Continental... requirements in the regulations under ``Renewable Energy and Alternate Uses of Existing Facilities on the Outer..., transportation, or transmission of energy from sources other than oil and gas (renewable energy). Specifically...

Surface current patterns suggested by suspended sediment distribution over the outer continental margin, Bering Sea

USGS Publications Warehouse

Karl, Herman A.; Carlson, P.R.

1987-01-01

Samples of total suspended matter (TSM) were collected at the surface over the northern outer continental margin of the Bering Sea during the summers of 1980 and 1981. Volume concentrations of surface TSM averaged 0.6 and 1.1 mg l-1 for 1980 and 1981, respectively. Organic matter, largely plankton, made up about 65% of the near-surface TSM for both years. Distributions of TSM suggested that shelf circulation patterns were characterized either by meso- and large- scale eddies or by cross-shelf components of flow superimposed on a general northwesterly net drift. These patterns may be caused by large submarine canyons which dominate the physiography of this part of the Bering Sea continental margin. ?? 1987.

The Areal Extent of Brown Shrimp Habitat Suitability in Mobile Bay, Alabama USA: Targeting Vegetated Habitat Restoration

EPA Science Inventory

The availability of wetlands and shallow water habitats significantly influences Gulf of Mexico (GOM) penaeid shrimp fishery productivity. However, the GOM region has the highest rate of wetland loss in the U.S. Protection and management of these vital GOM habitats are critical t...

Oil-spill risk analysis: Outer continental shelf lease sale 158, Gulf of Alaska/Yakutat. Final report

DOE Office of Scientific and Technical Information (OSTI.GOV)

Anderson, C.M.; Johnson, W.R.; Marshall, C.F.

1995-01-01

The Federal Government has proposed to offer Outer Continental Shelf lands in the Gulf of Alaska/Yakutat for oil and gas leasing. Because oil spills may occur from activities associated with offshore oil production, the Minerals Management Service conducts a formal risk assessment. The report summarizes results of an oil-spill risk analysis conducted for OCS Lease Sale 158, Gulf of Alaska/Yakutat. The objective of this analysis was to estimate relative risks associated with oil and gas production for the proposed lease sale.

Automating CPM-GOMS

NASA Technical Reports Server (NTRS)

John, Bonnie; Vera, Alonso; Matessa, Michael; Freed, Michael; Remington, Roger

2002-01-01

CPM-GOMS is a modeling method that combines the task decomposition of a GOMS analysis with a model of human resource usage at the level of cognitive, perceptual, and motor operations. CPM-GOMS models have made accurate predictions about skilled user behavior in routine tasks, but developing such models is tedious and error-prone. We describe a process for automatically generating CPM-GOMS models from a hierarchical task decomposition expressed in a cognitive modeling tool called Apex. Resource scheduling in Apex automates the difficult task of interleaving the cognitive, perceptual, and motor resources underlying common task operators (e.g. mouse move-and-click). Apex's UI automatically generates PERT charts, which allow modelers to visualize a model's complex parallel behavior. Because interleaving and visualization is now automated, it is feasible to construct arbitrarily long sequences of behavior. To demonstrate the process, we present a model of automated teller interactions in Apex and discuss implications for user modeling. available to model human users, the Goals, Operators, Methods, and Selection (GOMS) method [6, 21] has been the most widely used, providing accurate, often zero-parameter, predictions of the routine performance of skilled users in a wide range of procedural tasks [6, 13, 15, 27, 28]. GOMS is meant to model routine behavior. The user is assumed to have methods that apply sequences of operators and to achieve a goal. Selection rules are applied when there is more than one method to achieve a goal. Many routine tasks lend themselves well to such decomposition. Decomposition produces a representation of the task as a set of nested goal states that include an initial state and a final state. The iterative decomposition into goals and nested subgoals can terminate in primitives of any desired granularity, the choice of level of detail dependent on the predictions required. Although GOMS has proven useful in HCI, tools to support the construction of GOMS models have not yet come into general use.

Comparison of KCl denuders with the pyrolysis method and calibration using HgBr2 at an in-service AMNET site

NASA Astrophysics Data System (ADS)

McClure, C.; Jaffe, D. A.; Edgerton, E.; Jansen, J. J.

2013-12-01

During the summer of 2013, we initiated a project to examine the performance of Tekran measurements of Gaseous Oxidized Mercury (GOM) with a pyrolysis method at the North Birmingham SEARCH site. Measurements started in June 2013 and will run until September 2013. This project responds to recent studies that indicate problems with the KCl denuder method for collection of GOM (e.g. Lyman et al., 2010; Gustin et al., 2013; Ambrose et al., 2013). For this project, we compared two GOM measurement systems, one using the KCl denuder method and a second method using high temperature pyrolysis of Hg compounds and detection of the resulting Hg0 vapors. Both instruments were also calibrated using an HgBr2 source to understand the recovery of one possible atmospheric GOM constituent. Both instruments sampled from a common, heated manifold. Past work has shown that in order to fully transmit HgBr2 sample lines must be made from PFA lines and heated to 100 °C. The transmission rate of HgBr2 during this project is approximately 90% over 25 feet of sample tubing at this temperature. Very preliminary results from this study have found that the transmitted HgBr2 is captured with 95% efficiency in carbon-scrubbed ambient air for both the KCl denuder and the pyrolysis method. However, the denuder method appears to be significantly less efficient in the capture of GOM when sampling unaltered ambient air versus the pyrolysis validation of total Hg0. Therefore, calibration of GOM measurements is essential in order to accurately correct for fluctuations in the GOM capture efficiency. We have also found that calibrations for GOM can be done routinely in the field and that these are essential to fully understand the GOM measurements. At present our calibration system is performed manually, but in principle this method could be readily automated.

Use of criteria pollutants, active and passive mercury sampling, and receptor modeling to understand the chemical forms of gaseous oxidized mercury in Florida

NASA Astrophysics Data System (ADS)

Huang, J.; Miller, M. B.; Edgerton, E.; Gustin, M. S.

2015-04-01

The highest mercury (Hg) wet deposition in the United States (US) occurs along the Gulf of Mexico, and in the southern and central Mississippi River Valley. Gaseous oxidized Hg (GOM) is thought to be a major contributor due to its high water solubility and reactivity. Therefore, it is critical to understand the concentrations, potential for wet and dry deposition, and GOM compounds present in the air. Concentrations and dry deposition fluxes of GOM were measured at Outlying Landing Field (OLF), Florida, using a Tekran® 2537/1130/1135, and active and passive samplers using cation-exchange and nylon membranes. Relationships with Tekran® derived data must be interpreted with caution, since GOM concentrations can be biased low depending on the chemical compounds in air, and interferences with water vapor and ozone. Only gaseous elemental Hg and GOM are discussed here since the PBM measurement uncertainties are higher. Criteria air pollutants were concurrently measured and Tekran® data were assessed along with these using Principal Component Analysis to identify associations among air pollutants. Based on the diel pattern, high GOM concentrations at this site were associated with fossil fuel combustion and gas phase oxidation during the day, and gas phase oxidation and transport in the free troposphere. The ratio of GEM/CO at OLF (0.008 ng m-3 ppbv-1) was much higher than the numbers reported for the Western United States and central New York for domestic emissions or biomass burning (0.001 ng m-3 ppbv-1), which we suggest is indicative of a marine boundary layer source. Results from nylon membranes with thermal desorption analyses suggest five potential GOM compounds exist in this area, including HgBr2, HgO, Hg(NO3)2, HgSO4, and an unknown compound. This indicates that the site is influenced by different gaseous phase reactions and sources. A~high GOM event related to high CO but average SO2 suggests the air parcels moved from the free troposphere and across Arkansas, Mississippi, and Alabama at low elevation (< 300 m) using back trajectory analysis. We hypothesize this is due to subsidence of Hg containing air from the free troposphere. It is difficult to fully understand GOM dry deposition processes without knowing the actual GOM compounds, and their corresponding physicochemical properties, such as the Henry's Law constant. Overall, measured GOM dry deposition at this site ranged from 4-23% of total Hg wet deposition. The Aerohead sampling system for dry deposition captures primarily GOM since it would only collect fine particulate bound Hg by way of diffusion.

Assessment of the U. S. outer continental shelf environmental studies program. 1. Physical oceanography. Final report

DOE Office of Scientific and Technical Information (OSTI.GOV)

Not Available

Federal responsibility for oil and gas development on the U.S. outer continental shelf (OCS) resides with the Minerals Management Service (MMS) of the U.S. Department of the Interior (DOI). The DOI's Environmental Studies Program (ESP) is the program through which MMS conducts environmental studies on the OCS and collects information to prepare environmental impact statements (EISs). It appeared to MMS in 1986 that the time was ripe to assess the status of the present program and to explore the needs for future studies. MMS requested an evaluation of the adequacy and applicability of ESP studies, a review of the generalmore » state of knowledge in the appropriate disciplines, and recommendations for future studies. Three panels were established, one of which, the Physical Oceanography Panel, investigated the physical oceanographic aspects of the ESP, the subject of the report, which is the first of three in a series. In reviewing the ESP's physical oceanography program, the panel evaluated the quality and relevance of studies carried out in waters under federal control, which extend from the limits of state jurisdictions (3-12 miles offshore) and include the central and outer continental shelf waters and the continental slope.« less

30 CFR 203.2 - How can I obtain royalty relief?

Code of Federal Regulations, 2010 CFR

2010-07-01

... 203.49). (g) Located in a designated GOM shallow water area Drill and produce gas from an ultra-deep...) Located in a designated GOM deep water area (i.e., 200 meters or greater) and acquired in a lease sale... 203.79). (c) Located in a designated GOM deep water area and acquired in a lease sale held before...

77 FR 19944 - Magnuson-Stevens Fishery Conservation and Management Act Provisions; Fisheries of the...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-04-03

... will constrain catch to the recreational sub-ACL; and reduce overfishing occurring on GOM cod in...). This interim rule implements a total GOM cod total annual catch limit (ACL) of 6,700 mt and divides... implementing interim measures: Setting a total GOM cod ACL in a 6,700 to 7,500 mt range; Modifying the...

GOM-Face: GKP, EOG, and EMG-based multimodal interface with application to humanoid robot control.

PubMed

Nam, Yunjun; Koo, Bonkon; Cichocki, Andrzej; Choi, Seungjin

2014-02-01

We present a novel human-machine interface, called GOM-Face , and its application to humanoid robot control. The GOM-Face bases its interfacing on three electric potentials measured on the face: 1) glossokinetic potential (GKP), which involves the tongue movement; 2) electrooculogram (EOG), which involves the eye movement; 3) electromyogram, which involves the teeth clenching. Each potential has been individually used for assistive interfacing to provide persons with limb motor disabilities or even complete quadriplegia an alternative communication channel. However, to the best of our knowledge, GOM-Face is the first interface that exploits all these potentials together. We resolved the interference between GKP and EOG by extracting discriminative features from two covariance matrices: a tongue-movement-only data matrix and eye-movement-only data matrix. With the feature extraction method, GOM-Face can detect four kinds of horizontal tongue or eye movements with an accuracy of 86.7% within 2.77 s. We demonstrated the applicability of the GOM-Face to humanoid robot control: users were able to communicate with the robot by selecting from a predefined menu using the eye and tongue movements.

Using GOMS models and hypertext to create representations of medical procedures for online display

NASA Technical Reports Server (NTRS)

Gugerty, Leo; Halgren, Shannon; Gosbee, John; Rudisill, Marianne

1991-01-01

This study investigated two methods to improve organization and presentation of computer-based medical procedures. A literature review suggested that the GOMS (goals, operators, methods, and selecton rules) model can assist in rigorous task analysis, which can then help generate initial design ideas for the human-computer interface. GOMS model are hierarchical in nature, so this study also investigated the effect of hierarchical, hypertext interfaces. We used a 2 x 2 between subjects design, including the following independent variables: procedure organization - GOMS model based vs. medical-textbook based; navigation type - hierarchical vs. linear (booklike). After naive subjects studies the online procedures, measures were taken of their memory for the content and the organization of the procedures. This design was repeated for two medical procedures. For one procedure, subjects who studied GOMS-based and hierarchical procedures remembered more about the procedures than other subjects. The results for the other procedure were less clear. However, data for both procedures showed a 'GOMSification effect'. That is, when asked to do a free recall of a procedure, subjects who had studies a textbook procedure often recalled key information in a location inconsistent with the procedure they actually studied, but consistent with the GOMS-based procedure.

Dissolved Organic Matter in the Gulf of Maine: Implications for Blue Carbon Cycling in Coastal Waters

NASA Astrophysics Data System (ADS)

Aiken, G.

2016-12-01

Nutrients and dissolved organic matter (DOM) delivered from terrestrial sources to coastal oceans are critical for ocean productivity and the blue carbon cycle. Assessing influences of these inputs on marine productivity is difficult due to the difficulty in monitoring the processes controlling carbon cycling over short time frames, as well as the lack of historical data to assess possible trends. In this presentation, results of a long-term study designed to assess productivity and water quality in the Gulf of Maine (GoM), and waters delivering terrestrially derived DOM to the GoM are presented. DOM in the major tributaries and discrete samples collected along transects in the GoM were characterized by many analytical approaches including measurement of DOM optical properties, DOM fractionation, isotopic , 13C-NMR and FTICR-MS analyses. The compositional information provided by these was combined with optical data obtained by an in-situ glider and remotely sensed satellite data. Results indicate that DOM associated with inflowing waters to the GoM is rich in aromatic compounds resulting in a large influx of terrestrially derived, chromophoric DOM. The net result of these inflows is that DOM in the GoM is more chromophoric than samples from the Sargasso Sea and mid-Pacific Ocean. Hydrologic analyses using discharge:concentration relationships along with historical river discharge data indicate that the amount of DOM from rivers to the GoM has increased over the past 80 years leading to a `yellowing' of the waters in the GoM. Indeed, comparisons of ocean color between the present study and observations made by Henry Bigelow in 1912-1913 using the Forel-Ule color scale indicate an increase in chromophoric DOM in the past century. Chromophoric DOM influences the productivity of aquatic systems by reducing light available for phytoplankton photosynthesis and growth. Over the course of this study, a decline in primary productivity was also observed, perhaps resulting from increased DOM fluxes to the GoM. Climate and hydrologic models predict increasing precipitation and runoff in the GoM watershed during this century, possibly resulting in an increase of terrestrial OM delivered to the GoM of 30% during the next 80 years. This could potentially influence productivity and blue carbon cycling in this marine system.

Metabolic Roles of Uncultivated Bacterioplankton Lineages in the Northern Gulf of Mexico "Dead Zone".

PubMed

Thrash, J Cameron; Seitz, Kiley W; Baker, Brett J; Temperton, Ben; Gillies, Lauren E; Rabalais, Nancy N; Henrissat, Bernard; Mason, Olivia U

2017-09-12

Marine regions that have seasonal to long-term low dissolved oxygen (DO) concentrations, sometimes called "dead zones," are increasing in number and severity around the globe with deleterious effects on ecology and economics. One of the largest of these coastal dead zones occurs on the continental shelf of the northern Gulf of Mexico (nGOM), which results from eutrophication-enhanced bacterioplankton respiration and strong seasonal stratification. Previous research in this dead zone revealed the presence of multiple cosmopolitan bacterioplankton lineages that have eluded cultivation, and thus their metabolic roles in this ecosystem remain unknown. We used a coupled shotgun metagenomic and metatranscriptomic approach to determine the metabolic potential of Marine Group II Euryarchaeota , SAR406, and SAR202. We recovered multiple high-quality, nearly complete genomes from all three groups as well as candidate phyla usually associated with anoxic environments- Parcubacteria (OD1) and Peregrinibacteria Two additional groups with putative assignments to ACD39 and PAUC34f supplement the metabolic contributions by uncultivated taxa. Our results indicate active metabolism in all groups, including prevalent aerobic respiration, with concurrent expression of genes for nitrate reduction in SAR406 and SAR202, and dissimilatory nitrite reduction to ammonia and sulfur reduction by SAR406. We also report a variety of active heterotrophic carbon processing mechanisms, including degradation of complex carbohydrate compounds by SAR406, SAR202, ACD39, and PAUC34f. Together, these data help constrain the metabolic contributions from uncultivated groups in the nGOM during periods of low DO and suggest roles for these organisms in the breakdown of complex organic matter. IMPORTANCE Dead zones receive their name primarily from the reduction of eukaryotic macrobiota (demersal fish, shrimp, etc.) that are also key coastal fisheries. Excess nutrients contributed from anthropogenic activity such as fertilizer runoff result in algal blooms and therefore ample new carbon for aerobic microbial metabolism. Combined with strong stratification, microbial respiration reduces oxygen in shelf bottom waters to levels unfit for many animals (termed hypoxia). The nGOM shelf remains one of the largest eutrophication-driven hypoxic zones in the world, yet despite its potential as a model study system, the microbial metabolisms underlying and resulting from this phenomenon-many of which occur in bacterioplankton from poorly understood lineages-have received only preliminary study. Our work details the metabolic potential and gene expression activity for uncultivated lineages across several low DO sites in the nGOM, improving our understanding of the active biogeochemical cycling mediated by these "microbial dark matter" taxa during hypoxia. Copyright © 2017 Thrash et al.

The Continental Margins of the Western North Atlantic.

ERIC Educational Resources Information Center

Schlee, John S.; And Others

1979-01-01

Presents an interpretation of geological and geophysical data, which provides a summary of the structural and sedimentary history of the United States Atlantic Margin. The importance of an understanding of the development of the outer continental shelf to future hydrocarbon exploration is detailed. (BT)

DOE Office of Scientific and Technical Information (OSTI.GOV)

Pomeroy, L.R.

There are three distinct but not mutually exclusive areas of research in this contract, studies of intrusions of the west wall of the Gulf Stream onto the outer continental shelf, studies of the flux of materials across nearshore density fronts, and advances in understanding of the planktonic food web of the continental shelf. Studies of frontal events on the outer and inner continental shelf involve distinctive physical and chemical regimes and have proven to require distinctive biological approaches. The studies of the food web run through our work on both of the frontal regimes, but certain aspects have become subjectsmore » in their own right. We have developed a simulation model of the flux of energy through the continental shelf food web which we believe to be more realistic than previous ones of its type. We have examined several of the many roles of dissolved organic compounds in sea water which originate either from release by phytoplankton, digestive processes or metabolites of zooplankton, or extracellular digestion of microorganisms. Methods have been developed under this contract to measure both the chelating capacity of naturally occurring organic materials and the copper concentration in the water. It has been possible to characterize the effects, both toxic and stimulatory, of copper on photosynthesis of naturally occurring phytoplankton populations. It is possible to characterize in considerable detail the course of biological events associated with meanders of the Gulf Stream. We are now in a position to explain the limits to biological productivity of the outer continental shelf of the southeastern US and the reasons why that biological production moves through the food web in the characteristic way that it does.« less

A preliminary assessment of geologic framework and sediment thickness studies relevant to prospective US submission on extended continental shelf

USGS Publications Warehouse

Hutchinson, Deborah R.; Childs, Jonathan R.; Hammar-Klose, Erika; Dadisman, Shawn; Edgar, N. Terrence; Barth, Ginger A.

2004-01-01

Under the provisions of Articles 76 and 77 of the United Nations Convention on the Law of the Sea (UNCLOS), coastal States have sovereign rights over the continental shelf territory beyond 200-nautical mile (nm) from the baseline from which the territorial sea is measured if certain conditions are met regarding the geologic and physiographic character of the legal continental shelf as defined in those articles. These claims to an extended continental shelf must be supported by relevant bathymetric, geophysical and geological data according to guidelines established by the Commission on the Limits of the Continental Shelf (CLCS, 1999). In anticipation of the United States becoming party to UNCLOS, Congress in 2001 directed the Joint Hydrographic Center/Center for Coastal and Ocean Mapping at the University of New Hampshire to conduct a study to evaluate data relevant to establishing the outer limit of the juridical continental shelf beyond 200 nm and to recommend what additional data might be needed to substantiate such an outer limit (Mayer and others, 2002). The resulting report produced an impressive and sophisticated GIS database of data sources. Because of the short time allowed to complete the report, all seismic reflection data were classified together; the authors therefore recommended that USGS perform additional analysis on seismic and related data holdings. The results of this additional analysis are the substance of this report, including the status of geologic framework, sediment isopach research, and resource potential in the eight regions1 identified by Mayer and others (2002) where analysis of seismic data might be crucial for establishing an outer limit . Seismic reflection and refraction data are essential in determining sediment thickness, one of the criteria used in establishing the outer limits of the juridical continental shelf. Accordingly, the initial task has been to inventory public-domain seismic data sources, primarily those regionally extensive data held within the Department of the Interior (DOI). The numerous seismic reflection and refraction surveys collected prior to 1970 by academic and governmental institutions are generally not included in this compilation, except where they provide unique data in a region. These data sources were omitted from this report because they were deemed to be of insufficient quality (poorly navigated or low resolution) to meet the CLCS standards for a submission, or they were redundant with higher-quality, more modern data. Hence, this report attempts to identify those data sets of highest utility for establishing the outer limits of the juridical continental shelf. If there was any ambiguity or uncertainty about the relevance of a data set to a continental shelf submission, either by its quality, location, or other parameter, it was included in this compilation. This report does not summarize other geophysical data (such as marine magnetics or gravity) that might be relevant to understanding crustal provenance and geological continuity. Detailed metadata tables and maps are included to facilitate the location and utilization of these sources when a comprehensive assessment (?desktop study?) is undertaken.

Flux of Total Mercury and Methylmercury to the Northern Gulf of Mexico from U.S. Estuaries.

PubMed

Buck, Clifton S; Hammerschmidt, Chad R; Bowman, Katlin L; Gill, Gary A; Landing, William M

2015-12-15

To better understand the source of elevated methylmercury (MeHg) concentrations in Gulf of Mexico (GOM) fish, we quantified fluxes of total Hg and MeHg from 11 rivers in the southeastern United States, including the 10 largest rivers discharging to the GOM. Filtered water and suspended particles were collected across estuarine salinity gradients in Spring and Fall 2012 to estimate fluxes from rivers to estuaries and from estuaries to coastal waters. Fluxes of total Hg and MeHg from rivers to estuaries varied as much as 100-fold among rivers. The Mississippi River accounted for 59% of the total Hg flux and 49% of the fluvial MeHg flux into GOM estuaries. While some estuaries were sources of Hg, the combined estimated fluxes of total Hg (~5200 mol y(-1)) and MeHg (~120 mol y(-1)) from the estuaries to the GOM were less than those from rivers to estuaries, suggesting an overall estuarine sink. Fluxes of total Hg from the estuaries to coastal waters of the northern GOM are approximately an order of magnitude less than from atmospheric deposition. However, fluxes from rivers are significant sources of MeHg to estuaries and coastal regions of the northern GOM.

Review of historical unusual mortality events (UMEs) in the Gulf of Mexico (1990-2009): providing context for the multi-year northern Gulf of Mexico cetacean UME declared in 2010.

PubMed

Litz, Jenny A; Baran, Melody A; Bowen-Stevens, Sabrina R; Carmichael, Ruth H; Colegrove, Kathleen M; Garrison, Lance P; Fire, Spencer E; Fougeres, Erin M; Hardy, Ron; Holmes, Secret; Jones, Wanda; Mase-Guthrie, Blair E; Odell, Daniel K; Rosel, Patricia E; Saliki, Jeremiah T; Shannon, Delphine K; Shippee, Steve F; Smith, Suzanne M; Stratton, Elizabeth M; Tumlin, Mandy C; Whitehead, Heidi R; Worthy, Graham A J; Rowles, Teresa K

2014-12-02

An unusual mortality event (UME) was declared for cetaceans in the northern Gulf of Mexico (GoM) for Franklin County, Florida, west through Louisiana, USA, beginning in February 2010 and was ongoing as of September 2014. The 'Deepwater Horizon' (DWH) oil spill began on 20 April 2010 in the GoM, raising questions regarding the potential role of the oil spill in the UME. The present study reviews cetacean mortality events that occurred in the GoM prior to 2010 (n = 11), including causes, durations, and some specific test results, to provide a historical context for the current event. The average duration of GoM cetacean UMEs prior to 2010 was 6 mo, and the longest was 17 mo (2005-2006). The highest number of cetacean mortalities recorded during a previous GoM event was 344 (in 1990). In most previous events, dolphin morbillivirus or brevetoxicosis was confirmed or suspected as a causal factor. In contrast, the current northern GoM UME has lasted more than 48 mo and has had more than 1000 reported mortalities within the currently defined spatial and temporal boundaries of the event. Initial results from the current UME do not support either morbillivirus or brevetoxin as primary causes of this event. This review is the first summary of cetacean UMEs in the GoM and provides evidence that the most common causes of previous UMEs are unlikely to be associated with the current UME.

77 FR 24734 - Outer Continental Shelf (OCS) Renewable Energy Program Leasing for Marine Hydrokinetic Technology...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-04-25

... Continental Shelf (OCS) Renewable Energy Program Leasing for Marine Hydrokinetic Technology Testing Offshore... found online at: http://www.boem.gov/Renewable-Energy-Program/State-Activities/Florida.aspx . [[Page.... FOR FURTHER INFORMATION CONTACT: Michelle Morin, BOEM Office of Renewable Energy Programs, 381 Elden...

75 FR 51968 - Outer Continental Shelf Air Regulations Consistency Update for Massachusetts

Federal Register 2010, 2011, 2012, 2013, 2014

2010-08-24

... comments to: Ida McDonnell, Air Permits, Toxics and Indoor Air Unit, Office of Ecosystem Protection, U.S... INFORMATION CONTACT: Ida E. McDonnell, Air Permits, Toxics and Indoor Air Unit, U.S. Environmental Protection... Continental Shelf Air Regulations Consistency Update for Massachusetts AGENCY: Environmental Protection Agency...

General trends of atmospheric mercury concentrations in urban and rural areas in Korea and characteristics of high-concentration events

NASA Astrophysics Data System (ADS)

Han, Young-Ji; Kim, Jung-Eun; Kim, Pyung-Rae; Kim, Woo-Jin; Yi, Seung-Muk; Seo, Yong-Seok; Kim, Seung-Hee

2014-09-01

Long-term measurement of speciated Hg concentrations is the first step toward identifying the seasonal and spatial characteristics of Hg concentrations; however, atmospheric Hg research is scarce in Korea. In this study, total gaseous mercury (TGM), gaseous oxidized mercury (GOM) and particle-bound mercury (PBM) were measured in urban (Seoul) and rural (Chuncheon) areas over a more than 3 year period in order to improve the understanding of speciated Hg transport. The mean concentrations of TGM, GOM and PBM were 3.72 ± 2.96 (0.19-149.84) ng m-3, 11.3 ± 9.5 (0.9-57.3) pg m-3, and 13.4 ± 12.0 (2.1-64.3) pg m-3 at the Seoul site and 2.12 ± 1.47 (0.26-10.75) ng m-3, 2.7 ± 2.7 (0.1-16.9) pg m-3, and 3.7 ± 5.7 (0.1-30.0) pg m-3 in Chuncheon. Both long-range transport and local sources caused high TGM concentration events, while local coal combustion was a main cause of enhancing the GOM and PBM concentrations in Seoul. However, there was no correlation between the pollutants emitted from coal combustion and the speciated Hg concentration in Chuncheon, indicating that other mechanisms were involved in the Hg increase. We found a positive correlation between the GOM and the O3 concentrations and a negative correlation between the GEM and the GOM concentrations, especially on foggy days, suggesting that the oxidation of GEM was an important source for GOM in Chuncheon. In addition, the ratio of PBM/GOM was inversely proportional to the atmospheric temperature and directly proportional to the relative humidity, which suggests that the in-situ formation of PBM through gas-particle partitioning of GOM was important in rural areas.

Measurement of Gaseous Oxidized Mercury at a SEARCH Network Site in Florida, USA

NASA Astrophysics Data System (ADS)

Huang, J.; Miller, M. B.; Gustin, M. S.

2013-12-01

There are three operationally defined forms of mercury (Hg) that have been measured in the atmosphere. These include gaseous elemental Hg (GEM), gaseous oxidized Hg (GOM), and particle-bound Hg (PBM). The chemical compounds that make up GOM are currently not well understood, and because of this we do not understand its transport and fate. Additionally, there are limitations associated with the current measurement method, the Tekran 2537/1130/1135 system. Recent work has shown that this system underestimates GOM concentrations, and may not measure all forms. Here we describe work building on ongoing research that focuses on understanding the limitations associated with the instrument, and the chemical forms of GOM. Mercury data have been collected at a Southeastern Aerosol Research and Characterization (SEARCH) network site, Outlying Landing Field (OLF), by the University of Nevada-Reno since 2006. This site is located near the Gulf of Mexico in western Florida. This site is potentially influenced by multiple Hg sources including marine air, electricity generating facilities, mobile sources, and long range transport from high elevation and inland regions. Recent work using data from this location and two others in Florida indicated that on top of background deposition, Hg input to OLF is due to local mobile sources, and long range transport in the spring. Air masses with different chemistry have been hypothesized to carry different GOM compounds. To test this hypothesis, an active Hg sampling system that collects GOM on nylon and cation-exchange membranes is being deployed at OLF. Measurements started March 2013. Here we will present data collected so far, and compare concentrations measured to those obtained using a Tekran system. Ancillary data including meteorology, criteria air pollutants, and those collected using surrogated surfaces for dry Hg deposition and Hg passive samplers will be applied to help understand the sources of GOM. Back trajectory analyses will also applied. This new method shows that different forms of GOM are present at OLF.

76 FR 53481 - Outer Continental Shelf, Alaska OCS Region, Chukchi Sea Planning Area, Oil and Gas Lease Sale 193

Federal Register 2010, 2011, 2012, 2013, 2014

2011-08-26

... DEPARTMENT OF THE INTERIOR Bureau of Ocean Energy Management, Regulation and Enforcement Outer... Ocean Energy Management, Regulation and Enforcement, Interior. ACTION: Notice of Availability of a Final Supplemental Environmental Impact Statement SUMMARY: The Bureau of Ocean Energy Management, Regulation and...

The Links Between the Formation of the Gulf of Mexico and the Late Proterozoic to Mesozoic Tectonic Evolution of Southern North America

NASA Astrophysics Data System (ADS)

Keller, G. R.; Mickus, K. L.; Gurrola, H.; Harry, D. L.; Pulliam, J.

2016-12-01

A full understanding of the Gulf of Mexico's geologic history depends on understanding the tectonic framework along the southern margin of North America. The first step in establishing this framework was the breakup of Laurentia during the Early Paleozoic. At least one tectonic block rifted away from Laurentia's southern margin at this time, and is interpreted to be presently located in Argentina. Rifting resulted in a sinuous margin consisting of alternating ridge and transform segments extending from the southeastern U.S. across Texas into northern Mexico. The Paleozoic margin is associated with a clearly defined gravity high, and ends in the trend of this high are associated with intersections of ridge and transform segments along the margin. By the end of the Paleozoic, continental assembly via the Appalachian-Ouachita orogeny added new terranes to the eastern and southern margins of Laurentia and the assembly of the supercontinent Pangea was complete. Triassic through Late Jurassic opening of the Gulf of Mexico (GOM) created a complex margin, initially mobilizing several crustal blocks that were eventually left behind on the North American margin as seafloor spreading developed within the Gulf and the Yucatan block separated and rotated into its current position. Recent deep seismic reflection profiles along the northern margin of the GOM show that rifted continental crust extends offshore for 250 km before the oceanic crust of the Gulf of Mexico is encountered. Our group has worked to produce four integrated models of the lithospheric structure based upon reflection, refraction, and teleseismic data acquired across this margin integrated with gravity, magnetic, geologic and drilling data. These models define a complex zone of crustal thinning along the Gulf Coastal plain of Texas that is covered by up to 10km of primarily Cretaceous and younger sedimentary rocks. To the east along the coastal plain region, we have defined two large crustal blocks that were essentially left behind by the opening of the Gulf of Mexico.

Gas hydrate potential of the mid Atlantic outer continental shelf

USGS Publications Warehouse

Shedd, William W.; Hutchinson, Deborah R.

2006-01-01

For the last two years, the Minerals Management Service (MMS) has been studying the resource potential of gas hydrates in federal offshore lands of the Outer Continental Shelf (OCS) off the Atlantic, Gulf of Mexico, Pacific, and Alaska in collaboration with the U.S. Geological Survey (USGS), the Department of Energy (DOE), the National Oceanic and Atmospheric Administration (NOAA), the Naval Research Lab (NRL) and academia. Utilizing its extensive seismic, well, and geochemical databases, the MMS will be reporting the in-place resource numbers within the next few months. Though the methodology of the study was not prospect oriented, discrete prospects have been recognized.

Hydrocarbon Seeps Formations: a Study Using 3-D Seismic Attributes in Combination with Satellite Data

NASA Astrophysics Data System (ADS)

Garcia-Pineda, O. G.; MacDonald, I. R.; Shedd, W.

2011-12-01

Analyzing the magnitude of oil discharges from natural hydrocarbon seeps is important in improving our understanding of carbon contribution as oil migrates from deeper sediments to the water column, and then eventually to the atmosphere. Liquid hydrocarbon seepage in the deep water of the Gulf of Mexico (GOM) is associated with deep cutting faults, associated with vertical salt movement, that provide conduits for the upward migration of oil and gas. Seeps transform surface geology and generate prominent geophysical targets that can be identified on 3-D seismic data as seafloor amplitude anomalies maps that correlate with the underlying deep fault systems. Using 3D seismic data, detailed mapping of the northern GOM has identified more than 21,000 geophysical anomalies across the basin. In addition to seismic data, Synthetic Aperture Radar (SAR) images have proven to be a reliable tool for localizing natural seepage of oil. We used a Texture Classifier Neural Network Algorithm (TCNNA) to process more than 1200 SAR images collected over the GOM. We quantified more than 900 individual seep formations distributed along the continental shelf and in deep water. Comparison of the geophysical anomalies with the SAR oil slick targets shows good general agreement between the distributions of the two indicators. However, there are far fewer active oil slicks than geophysical anomalies, most of which are probably associated with gas seepage. By examining several sites where the location of active venting can be determined by submersibles observations, we found that the active oily vents are often spatially offset from the most intense geophysical targets (i.e. GC600, GC767, GC204, etc). In addition to the displacement of the oil by deep sea currents, we propose that during the 100K years of activity, the location of the vents on the seafloor probably migrate as carbonate cementation reduces the permeability of the upper sediment. Many of the geophysical targets may represent inactive relict sites rather than present day natural seeps of liquid or gaseous hydrocarbon.

Step-changes in the physical, chemical and biological characteristics of the Gulf of Maine, as documented by the GNATS time series

USGS Publications Warehouse

Balch, William M.; Drapeau, D.T.; Bowler, B.C.; Huntington, Thomas G.

2012-01-01

We identify step-changes in the physical, chemical and biological characteristics of the Gulf of Maine (GoM) using the Gulf of Maine North Atlantic Time Series (GNATS), a series of oceanographic measurements obtained between September 1998 and December 2010 along a transect in the GoM running from Portland, ME, to Yarmouth, NS. GNATS sampled a period of extremes in precipitation and river discharge (4 of the 8 wettest years of the last century occurred between 2005 and 2010). Coincident with increased precipitation, we observed the following shifts: (1) decreased salinity and density within the surface waters of the western GoM; (2) both reduced temperature and vertical temperature gradients in the upper 50 m; (3) increased colored dissolved organic matter (CDOM) concentrations and particle scattering in the western GoM; (4) increased concentrations of nitrate and phosphate across all but the eastern GoM; (5) increased silicate, particularly in the western GoM, with a sharp increase in the ratio of silicate to dissolved inorganic nitrogen; (6) sharply decreased carbon fixation by phytoplankton; (7) moderately decreased chlorophyll, particulate organic carbon (POC) and particulate inorganic carbon (PIC) in the central GoM and (8) decreased POC- and PIC-specific growth rates. Gulf-wide anomaly analyses suggest that (1) the surface density changes were predominantly driven by temperature, (2) dissolved nutrients, as well as POC/PON, varied in Redfield ratios and (3) anomalies for salinity, density, CDOM, particle backscattering and silicate were significantly correlated with river discharge. Precipitation and river discharge appear to be playing a critical role in controlling the long-term productivity of the Gulf of Maine by supplying CDOM and detrital material, which ultimately competes with phytoplankton for light absorption.

Preparation of graphene oxide-manganese dioxide for highly efficient adsorption and separation of Th(IV)/U(VI).

PubMed

Pan, Ning; Li, Long; Ding, Jie; Li, Shengke; Wang, Ruibing; Jin, Yongdong; Wang, Xiangke; Xia, Chuanqin

2016-05-15

Manganese dioxide decorated graphene oxide (GOM) was prepared via fixation of crystallographic MnO2 (α, γ) on the surface of graphene oxide (GO) and was explored as an adsorbent material for simultaneous removal of thorium/uranium ions from aqueous solutions. In single component systems (Th(IV) or U(VI)), the α-GOM2 (the weight ratio of GO/α-MnO2 of 2) exhibited higher maximum adsorption capacities toward both Th(IV) (497.5mg/g) and U(VI) (185.2 mg/g) than those of GO. In the binary component system (Th(IV)/U(VI)), the saturated adsorption capacity of Th(IV) (408.8 mg/g)/U(VI) (66.8 mg/g) on α-GOM2 was also higher than those on GO. Based on the analysis of various data, it was proposed that the adsorption process may involve four types of molecular interactions including coordination, electrostatic interaction, cation-pi interaction, and Lewis acid-base interaction between Th(IV)/U(VI) and α-GOM2. Finally, the Th(IV)/U(VI) ions on α-GOM2 can be separated by a two-stage desorption process with Na2CO3/EDTA. Those results displayed that the α-GOM2 may be utilized as an potential adsorbent for removing and separating Th(IV)/U(VI) ions from aqueous solutions. Copyright © 2016 Elsevier B.V. All rights reserved.

The areal extent of brown shrimp habitat suitability in Mobile Bay, Alabama, USA: Targeting vegetated habitat restoration

USGS Publications Warehouse

Smith, L.M.; Nestlerode, J.A.; Harwell, L.C.; Bourgeois, P.

2010-01-01

The availability of wetlands and shallow water habitats significantly influences Gulf of Mexico (GOM) penaeid shrimp fishery productivity. However, the GOM region has the highest rate of wetland loss in the USA. Protection and management of these vital GOM habitats are critical to sustainable shrimp fisheries. Brown shrimp (Farfantepenaeus aztecus) are a major component of GOM fisheries. We present an approach for estimating the areal extent of suitable habitat for post-larval and juvenile brown shrimp in Mobile Bay, Alabama, using an existing habitat suitability index model for the northern GOM calculated from probabilistic survey of water quality and sediment data, land cover data, and submerged aquatic vegetation coverages. This estuarine scale approach is intended to support targeted protection and restoration of these habitats. These analyses indicate that approximately 60% of the area of Mobile Bay is categorized as suitable to near optimal for post-larval and juvenile shrimp and 38% of the area is marginally to minimally suitable. We identify potential units within Mobile Bay for targeted restoration to improve habitat suitability. ?? 2010 Springer Science+Business Media B.V.

Deep-sea coral and hardbottom habitats on the west Florida slope, eastern Gulf of Mexico

NASA Astrophysics Data System (ADS)

Ross, Steve W.; Rhode, Mike; Brooke, Sandra

2017-02-01

Until recently, benthic habitats dominated by deep-sea corals (DSC) appeared to be less extensive on the slope of the Gulf of Mexico (GOM) than in the northeast Atlantic Ocean or off the southeastern US. There are relatively few bioherms (i.e., coral-built mounds) in the northern GOM, and most DSCs are attached to existing hard substrata (e.g., authigenically formed carbonate). The primary structure-forming, DSC in the GOM is Lophelia pertusa, but structure is also provided by other living and dead scleractinians, antipatharians (black corals), octocorals (gorgonians, soft corals), hydrocorals and sponges, as well as abundant rocky substrata. The best development of DSCs in the GOM was previously documented within Viosca Knoll oil and gas lease blocks 826 and 862/906 (north-central GOM) and on the Campeche Bank (southern GOM in Mexican waters). This paper documents extensive deep reef ecosystems composed of DSC and rocky hard-bottom recently surveyed on the West Florida Slope (WFS, eastern GOM) during six research cruises (2008-2012). Using multibeam sonar, CTD casts, and video from underwater vehicles, we describe the physical and oceanographic characteristics of these deep reefs and provide size or area estimates of deep coral and hardground habitats. The multibeam sonar analyses revealed hundreds of mounds and ridges, some of which were subsequently surveyed using underwater vehicles. Mounds and ridges in <525 m depths were usually capped with living coral colonies, dominated by L. pertusa. An extensive rocky scarp, running roughly north-south for at least 229 km, supported lower abundances of scleractinian corals than the mounds and ridges, despite an abundance of settlement substrata. Areal comparisons suggested that the WFS may exceed other parts of the GOM slope in extent of living deep coral coverage and other deep-reef habitat (dead coral and rock). The complex WFS region warrants additional studies to better understand the influences of oceanography and geology on the occurrence of DSC and associated organisms. Protection measures are being considered to ensure the long-term integrity of this diverse ecosystem.

Reprint of - Deep-sea coral and hardbottom habitats on the west Florida slope, eastern Gulf of Mexico

NASA Astrophysics Data System (ADS)

Ross, Steve W.; Rhode, Mike; Brooke, Sandra

2017-09-01

Until recently, benthic habitats dominated by deep-sea corals (DSC) appeared to be less extensive on the slope of the Gulf of Mexico (GOM) than in the northeast Atlantic Ocean or off the southeastern US. There are relatively few bioherms (i.e., coral-built mounds) in the northern GOM, and most DSCs are attached to existing hard substrata (e.g., authigenically formed carbonate). The primary structure-forming, DSC in the GOM is Lophelia pertusa, but structure is also provided by other living and dead scleractinians, antipatharians (black corals), octocorals (gorgonians, soft corals), hydrocorals and sponges, as well as abundant rocky substrata. The best development of DSCs in the GOM was previously documented within Viosca Knoll oil and gas lease blocks 826 and 862/906 (north-central GOM) and on the Campeche Bank (southern GOM in Mexican waters). This paper documents extensive deep reef ecosystems composed of DSC and rocky hard-bottom recently surveyed on the West Florida Slope (WFS, eastern GOM) during six research cruises (2008-2012). Using multibeam sonar, CTD casts, and video from underwater vehicles, we describe the physical and oceanographic characteristics of these deep reefs and provide size or area estimates of deep coral and hardground habitats. The multibeam sonar analyses revealed hundreds of mounds and ridges, some of which were subsequently surveyed using underwater vehicles. Mounds and ridges in <525 m depths were usually capped with living coral colonies, dominated by L. pertusa. An extensive rocky scarp, running roughly north-south for at least 229 km, supported lower abundances of scleractinian corals than the mounds and ridges, despite an abundance of settlement substrata. Areal comparisons suggested that the WFS may exceed other parts of the GOM slope in extent of living deep coral coverage and other deep-reef habitat (dead coral and rock). The complex WFS region warrants additional studies to better understand the influences of oceanography and geology on the occurrence of DSC and associated organisms. Protection measures are being considered to ensure the long-term integrity of this diverse ecosystem.

Temperature Calibration of a Northern Gulf of Mexico Siderastrea siderea Coral

NASA Astrophysics Data System (ADS)

Wagner, A. J.; DeLong, K. L.; Kilbourne, K. H.; Richey, J. N.; Jelinek, K.; Hickerson, E.; Slowey, N. C.

2015-12-01

The Gulf of Mexico (GOM) is sensitive to oceanic and atmospheric variability in both the Atlantic and Pacific Oceans (i.e., Atlantic Multidecadal Oscillation (AMO), El Niño Southern Oscillation (ENSO), Pacific North American Pattern (PNA), and Pacific Decadal Oscillation (PDO)). The major GOM current, the Loop Current, feeds the Gulf Stream as it transports oceanic heat to the northern Atlantic Ocean. The northern GOM is the northernmost summer extent of the western hemisphere warm pool (WHWP) that drives oceanic moisture flux and precipitation into the Americas. Decadally-resolved foraminifera reconstructions from the northern GOM indicates SST was 2 to 4ºC colder on average than today during the Little Ice Age (LIA, ~1850), whereas a subannually-resolved coral reconstruction from the southeastern GOM find 1.5 to 2ºC colder intervals and reduced areal extent of the WHWP on interannual time scales during some intervals of the LIA. However, records capable of resolving annual and subannual SST variability from the northern GOM, necessary for investigating WHWP northern extent, are still lacking. Here we present a new temperature reconstruction for the northern GOM derived from strontium-to-calcium (Sr/Ca) ratios of approximately monthly samples milled from a Siderastrea siderea coral core collected from the Flower Garden Banks National Marine Sanctuary (FGBNMS; 27° 52.5'N, 93° 49'W) growing at a water depth of 20 m. Coral Sr/Ca is calibrated to reef temperature data from FGBNMS Hobotemp data loggers near the reef cap in ~22 m water depth (1986-2004) and to NOAA OISST (1981-2004), which co-varies with the reef temperature (r=0.95, p<0.05, n=146) and consistently captures winter values in reef temperature with slightly warmer summers (0.9ºC on average). The Sr/Ca-SST calibration slope (-0.043, r=-0.89, n=136, p<0.01 for reef temperature; -0.039, r=-0.94, n=275, p<0.01 for OISST) agrees well with published coral Sr/Ca-SST calibrations for S. siderea in the southeastern GOM from shallower water depths.

77 FR 57581 - Environmental Documents Prepared for Oil, Gas, and Mineral Operations by the Gulf of Mexico Outer...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-09-18

... DEPARTMENT OF THE INTERIOR Bureau of Ocean Energy Management Environmental Documents Prepared for Oil, Gas, and Mineral Operations by the Gulf of Mexico Outer Continental Shelf (OCS) Region AGENCY: Bureau of Ocean Energy Management (BOEM), Interior. ACTION: Notice of the availability of environmental...

77 FR 34405 - Environmental Documents Prepared for Oil, Gas, and Mineral Operations by the Gulf of Mexico Outer...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-06-11

... DEPARTMENT OF THE INTERIOR Bureau of Ocean Energy Management Environmental Documents Prepared for Oil, Gas, and Mineral Operations by the Gulf of Mexico Outer Continental Shelf (OCS) Region AGENCY: Bureau of Ocean Energy Management (BOEM), Interior. ACTION: Notice of the availability of environmental...

77 FR 74213 - Environmental Documents Prepared for Oil, Gas, and Mineral Operations by the Gulf of Mexico Outer...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-12-13

... DEPARTMENT OF THE INTERIOR Bureau of Ocean Energy Management Environmental Documents Prepared for Oil, Gas, and Mineral Operations by the Gulf of Mexico Outer Continental Shelf (OCS) Region AGENCY: Bureau of Ocean Energy Management (BOEM), Interior. ACTION: Notice of the availability of environmental...

75 FR 803 - Safety Zone; FRONTIER DISCOVERER, Outer Continental Shelf Drillship, Chukchi and Beaufort Sea...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-01-06

... order to drill exploratory wells at various prospects located in the Chukchi and Beaufort Sea Outer... reduce the threat of allisions, oil spills, and releases of natural gas, and thereby protect the safety... FRONTIER DISCOVERER while anchored on location in order to drill exploratory wells in several prospects...

Importance of the Gulf of Mexico as a climate driver for U.S. severe thunderstorm activity

NASA Astrophysics Data System (ADS)

Molina, M. J.; Timmer, R. P.; Allen, J. T.

2016-12-01

Different features of the Gulf of Mexico (GOM), such as the Loop Current and warm-core rings, are found to influence monthly-to-seasonal severe weather occurrence in different regions of the United States (U.S.). The warmer (cooler) the GOM sea surface temperatures, the more (less) hail and tornadoes occur during March-May over the southern U.S. This pattern is reflected physically in boundary layer specific humidity and mixed-layer convective available potential energy, two large-scale atmospheric conditions favorable for severe weather occurrence. This relationship is complicated by interactions between the GOM and El Niño-Southern Oscillation (ENSO) but persists when analyzing ENSO neutral conditions. This suggests that the GOM can influence hail and tornado occurrence and provides another source of regional predictability for seasonal severe weather.

Relative contributions of gaseous oxidized mercury and fine and coarse particle-bound mercury to mercury wet deposition at nine monitoring sites in North America

NASA Astrophysics Data System (ADS)

Cheng, Irene; Zhang, Leiming; Mao, Huiting

2015-08-01

Relative contributions to mercury wet deposition by gaseous oxidized mercury (%GOM) and fine and coarse particle-bound mercury (%FPBM and %CPBM) were estimated making use of monitored FPBM air concentration and mercury wet deposition at nine North American locations. Scavenging ratios of particulate inorganic ions (K+ and Ca2+, Mg2+ and Na+) were used as a surrogate for those of FPBM and CPBM, respectively. FPBM and CPBM were estimated to contribute 8-36% and 5-27%, respectively, depending on the location, to total wet deposition. The rest of the 39-87% was attributed to the contribution of GOM. The average %GOM, %FPBM and %CPBM among all locations were 65%, 17%, and 18%, respectively. The relative distributions of %GOM, %FPBM, and %CPBM were influenced by Hg(II) gas-particle partitioning, urban site characteristics, and precipitation type. At the regional scale, %GOM dominated over %FPBM and %CPBM. However, the sum of FPBM and CPBM contributed to nearly half of the total Hg wet deposition in urban areas, which was greater than other site categories and is attributed to higher FPBM air concentrations. At four locations, %FPBM exceeded %GOM during winter in contrast to summer, suggesting the efficient snow scavenging of aerosols. The results from this study are useful in improving mercury transport models since most of these models do not estimate CPBM, but frequently use monitored mercury wet deposition data for model evaluation.

How do en route events around the Gulf of Mexico influence landbird populations

USGS Publications Warehouse

Cohen, Emily B.; Barrow, Wylie C.; Buler, Jeffrey J.; Deppe, Jill L.; Farnsworth, Andrew; Marra, Peter P.; McWilliams, Scott R.; Mehlman, David W; Wilson, R. Randy; Woodrey, Mark S; Moore, Frank R.

2017-01-01

Habitats around the Gulf of Mexico (GOM) provide critical resources for Nearctic–Neotropical migratory landbirds, the majority of which travel across or around the GOM every spring and fall as they migrate between temperate breeding grounds in North America and tropical wintering grounds in the Caribbean and Central and South America. At the same time, ecosystems in the GOM are changing rapidly, with unknown consequences for migratory landbird populations, many of which are experiencing population declines. In general, the extent to which events encountered en route limit migratory bird populations is not well understood. At the same time, information from weather surveillance radar, stable isotopes, tracking, eBird, and genetic datasets is increasingly available to address many of the unanswered questions about bird populations that migrate through stopover and airspace habitats in the GOM. We review the state of the science and identify key research needs to understand the impacts of en route events around the GOM region on populations of intercontinental landbird migrants that breed in North America, including: (1) distribution, timing, and habitat associations; (2) habitat characteristics and quality; (3) migratory connectivity; and (4) threats to and current conservation status of airspace and stopover habitats. Finally, we also call for the development of unified and comprehensive long-term monitoring guidelines and international partnerships to advance our understanding of the role of habitats around the GOM in supporting migratory landbird populations moving between temperate breeding grounds and wintering grounds in Mexico, Central and South America, and the Caribbean.

Oil-spill risk analysis: Outer continental shelf lease sale 144, Beaufort Sea. Final report

DOE Office of Scientific and Technical Information (OSTI.GOV)

Anderson, C.M.; Johnson, W.R.; Marshall, C.F.

1995-08-01

The Federal Government has proposed to offer Outer Continental Shelf lands in the Beaufort Sea for oil and gas leasing. Because oil spills may occur from activities associated with offshore oil production, the Minerals Management Service conducts a formal risk assessment. In evaluating the significance of accidental oil spills, it is important to remember that the occurrence of such spills is fundamentally probabilistic. This report summarizes results of an oil-spill risk analysis conducted for OCS Lease Sale 144, Beaufort Sea. The objective of this analysis was to estimate relative risks associated with oil and gas production for the proposed leasemore » sale.« less

Characterization of phytoplankton pigments and functional community structure in the Gulf of Mannar and the Palk Bay using HPLC-CHEMTAX analysis

NASA Astrophysics Data System (ADS)

Madhu, N. V.; Ullas, N.; Ashwini, R.; Meenu, Paul; Rehitha, T. V.; Lallu, K. R.

2014-06-01

Phytoplankton marker pigments and their functional groups were identified for the first time in the Gulf of Mannar (GoM) and the Palk Bay (PB), located in the southeast coast of India using HPLC-CHEMTAX analytical techniques. The GoM generally remained more saline, productive (in terms of chlorophyll a) and less turbid than the PB during southwest and northeast monsoon periods. The diversity and concentration of marker pigments were high in the GoM, whereas the PB was characterized by high concentration of zeaxanthin, indicating the dominance of photosynthetic prokaryotes (cyanobacteria). The CHEMTAX analysis revealed that the phytoplankton biomass (chlorophyll a) in the PB was mainly derived from cyanobacterial community. However, abundance of fucoxanthin and peridinin in the GoM indicated microphytoplankton (20-200 µm) as the dominant group. The CHEMTAX results showed that more than 50% of chlorophyll a in the GoM was contributed by microphytoplankton, in particular diatoms and dinoflagellates. The substantial increase in the photoprotective carotenoids (PPCs) and photoprotection index (PI) in the PB was indicative of its low productivity, probably caused by the warm and turbid waters.

Coral forests diversity in the outer shelf of the south Sardinian continental margin

NASA Astrophysics Data System (ADS)

Cau, Alessandro; Moccia, Davide; Follesa, Maria Cristina; Alvito, Andrea; Canese, Simonepietro; Angiolillo, Michela; Cuccu, Danila; Bo, Marzia; Cannas, Rita

2017-04-01

Ecological theory predicts that heterogeneous habitats allow more species to co-exist in a given area, but to date, knowledge on relationships between habitat heterogeneity and biodiversity of coral forests in the outer shelf and upper slope along continental margins is rather limited. We investigated biodiversity of coral forests from 8 sites spread over two different geomorphological settings (namely, pinnacles vs. canyons) in the outer shelf along Sardinian continental margin. Using a combination of multivariate statistical analyses, we show here that differences in the composition of coral assemblages among contrasting geomorphological settings were not statistically significant, whereas significant differences emerged among sites within similar geomorphologies (i.e. among pinnacles and among canyons). Our results reveal that environmental and bathymetric factors such as sediment coverage, slope of the substrate, terrain ruggedness, bathymetric positioning index and aspect were important drivers of the observed patterns of coral biodiversity, in both settings. Spatial variability of coral forests' biodiversity is affected by environmental factors that act at the scale of each geomorphological setting (i.e. within each pinnacle and canyon) rather than by the contrasting geomorphological settings themselves. This result allows us to suggest that simple categorization of benthic communities according topographically defined habitat is unlikely to be sufficient for addressing conservation purposes.

75 FR 51943 - Safety Zone; DEEPWATER HORIZON at Mississippi Canyon 252 Outer Continental Shelf MODU in the Gulf...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-08-24

... the DEEPWATER HORIZON, a Mobile Offshore Drilling Unit (MODU), at Mississippi Canyon 252, in the Outer... the DEEPWATER HORIZON, a Mobile Offshore Drilling Unit (MODU), which is currently set to expire on... response to the sinking of the DEEPWATER HORIZON, a Mobile Offshore Drilling Unit (MODU), near Mississippi...

75 FR 54369 - BOEMRE Information Collection Activity: 1010-NEW, Upcoming Projects Considering the Use of Outer...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-09-07

... shore protection and beach and coastal restoration, or for use in construction projects funded in whole... Considering the Use of Outer Continental Shelf Sand, Gravel, and Shell Resources for Coastal Restoration and... will submit to BOEMRE to obtain OCS sand, gravel, and shell resources for use in shore protection and...

78 FR 72096 - Environmental Documents Prepared for Oil, Gas, and Mineral Operations by the Gulf of Mexico Outer...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-12-02

... environmental documents prepared for OCS mineral proposals by the Gulf of Mexico OCS Region. SUMMARY: BOEM, in... DEPARTMENT OF THE INTERIOR Bureau of Ocean Energy Management [MMAA104000] Environmental Documents Prepared for Oil, Gas, and Mineral Operations by the Gulf of Mexico Outer Continental Shelf (OCS) Region...

78 FR 47746 - Environmental Documents Prepared for Oil, Gas, and Mineral Operations by the Gulf of Mexico Outer...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-08-06

... Environmental Documents Prepared for OCS Mineral Proposals by the Gulf of Mexico OCS Region. SUMMARY: BOEM, in... DEPARTMENT OF THE INTERIOR Bureau of Ocean Energy Management [MMAA104000] Environmental Documents Prepared for Oil, Gas, and Mineral Operations by the Gulf of Mexico Outer Continental Shelf (OCS) Region...

78 FR 27422 - Environmental Documents Prepared for Oil, Gas, and Mineral Operations by the Gulf of Mexico Outer...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-05-10

... Environmental Documents Prepared for OCS Mineral Proposals by the Gulf of Mexico OCS Region. SUMMARY: BOEM, in... DEPARTMENT OF THE INTERIOR Bureau of Ocean Energy Management MMAA104000 Environmental Documents Prepared for Oil, Gas, and Mineral Operations by the Gulf of Mexico Outer Continental Shelf (OCS) Region...

77 FR 65547 - Reissuance of the NPDES General Permits for Oil and Gas Exploration Facilities on the Outer...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-10-29

... ENVIRONMENTAL PROTECTION AGENCY [FRL-9747-5] Reissuance of the NPDES General Permits for Oil and... Sea and on the Outer Continental Shelf in the Chukchi Sea, AK AGENCY: Environmental Protection Agency... draft general permits were also published in the Anchorage Daily News, the Arctic Sounder, and Petroleum...

75 FR 3915 - Environmental Documents Prepared in Support of Sand and Gravel Activities on the Outer...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-01-25

... of Sand and Gravel Activities on the Outer Continental Shelf AGENCY: Minerals Management Service... Environmental Policy Act (NEPA), the Council on Environmental Quality regulations (40 CFR parts 1500-1508), and... Impact (FONSI) prepared and/or adopted by the MMS for three sand and gravel activities proposed on the...

77 FR 38718 - Safety Zone; NOBLE DISCOVERER, Outer Continental Shelf Drillship, Chukchi and/or Beaufort Seas, AK

Federal Register 2010, 2011, 2012, 2013, 2014

2012-06-29

... Beaufort Seas, Alaska (See Table 1). Table 1--Prospect Locations Prospect Well Area Block Lease No... requirements. The planned exploration drilling in the identified lease blocks will be conducted with the NOBLE... outer boundaries of the safety zone to include the anchor chain extending from the OCS facilities; one...

Demographic Clusters Identified within the Northern Gulf of Mexico Common Bottlenose Dolphin (Tursiops truncates) Unusual Mortality Event: January 2010 - June 2013

PubMed Central

Venn-Watson, Stephanie; Garrison, Lance; Litz, Jenny; Fougeres, Erin; Mase, Blair; Rappucci, Gina; Stratton, Elizabeth; Carmichael, Ruth; Odell, Daniel; Shannon, Delphine; Shippee, Steve; Smith, Suzanne; Staggs, Lydia; Tumlin, Mandy; Whitehead, Heidi; Rowles, Teri

2015-01-01

A multi-year unusual mortality event (UME) involving primarily common bottlenose dolphins (Tursiops truncates) was declared in the northern Gulf of Mexico (GoM) with an initial start date of February 2010 and remains ongoing as of August 2014. To examine potential changing characteristics of the UME over time, we compared the number and demographics of dolphin strandings from January 2010 through June 2013 across the entire GoM as well as against baseline (1990-2009) GoM stranding patterns. Years 2010 and 2011 had the highest annual number of stranded dolphins since Louisiana’s record began, and 2011 was one of the years with the highest strandings for both Mississippi and Alabama. Statewide, annual numbers of stranded dolphins were not elevated for GoM coasts of Florida or Texas during the UME period. Demographic, spatial, and temporal clusters identified within this UME included increased strandings in northern coastal Louisiana and Mississippi (March-May 2010); Barataria Bay, Louisiana (August 2010-December 2011); Mississippi and Alabama (2011, including a high prevalence and number of stranded perinates); and multiple GoM states during early 2013. While the causes of the GoM UME have not been determined, the location and magnitude of dolphin strandings during and the year following the 2010 Deepwater Horizon oil spill, including the Barataria Bay cluster from August 2010 to December 2011, overlap in time and space with locations that received heavy and prolonged oiling. There are, however, multiple known causes of previous GoM dolphin UMEs, including brevetoxicosis and dolphin morbillivirus. Additionally, increased dolphin strandings occurred in northern Louisiana and Mississippi before the Deepwater Horizon oil spill. Identification of spatial, temporal, and demographic clusters within the UME suggest that this mortality event may involve different contributing factors varying by location, time, and bottlenose dolphin populations that will be better discerned by incorporating diagnostic information, including histopathology. PMID:25671657

Demographic clusters identified within the northern Gulf of Mexico common bottlenose dolphin (Tursiops truncates) unusual mortality event: January 2010-June 2013.

PubMed

Venn-Watson, Stephanie; Garrison, Lance; Litz, Jenny; Fougeres, Erin; Mase, Blair; Rappucci, Gina; Stratton, Elizabeth; Carmichael, Ruth; Odell, Daniel; Shannon, Delphine; Shippee, Steve; Smith, Suzanne; Staggs, Lydia; Tumlin, Mandy; Whitehead, Heidi; Rowles, Teri

2015-01-01

A multi-year unusual mortality event (UME) involving primarily common bottlenose dolphins (Tursiops truncates) was declared in the northern Gulf of Mexico (GoM) with an initial start date of February 2010 and remains ongoing as of August 2014. To examine potential changing characteristics of the UME over time, we compared the number and demographics of dolphin strandings from January 2010 through June 2013 across the entire GoM as well as against baseline (1990-2009) GoM stranding patterns. Years 2010 and 2011 had the highest annual number of stranded dolphins since Louisiana's record began, and 2011 was one of the years with the highest strandings for both Mississippi and Alabama. Statewide, annual numbers of stranded dolphins were not elevated for GoM coasts of Florida or Texas during the UME period. Demographic, spatial, and temporal clusters identified within this UME included increased strandings in northern coastal Louisiana and Mississippi (March-May 2010); Barataria Bay, Louisiana (August 2010-December 2011); Mississippi and Alabama (2011, including a high prevalence and number of stranded perinates); and multiple GoM states during early 2013. While the causes of the GoM UME have not been determined, the location and magnitude of dolphin strandings during and the year following the 2010 Deepwater Horizon oil spill, including the Barataria Bay cluster from August 2010 to December 2011, overlap in time and space with locations that received heavy and prolonged oiling. There are, however, multiple known causes of previous GoM dolphin UMEs, including brevetoxicosis and dolphin morbillivirus. Additionally, increased dolphin strandings occurred in northern Louisiana and Mississippi before the Deepwater Horizon oil spill. Identification of spatial, temporal, and demographic clusters within the UME suggest that this mortality event may involve different contributing factors varying by location, time, and bottlenose dolphin populations that will be better discerned by incorporating diagnostic information, including histopathology.

Development of Sr/Ca-d18O Temperature Calibrations of a Siderastrea siderea Coral from the Gulf of Mexico

NASA Astrophysics Data System (ADS)

Wagner, A. J.; DeLong, K. L.; Kilbourne, H.; Slowey, N. C.

2016-12-01

The Gulf of Mexico (GOM) is sensitive to oceanic and atmospheric variability in both the Atlantic and Pacific Oceans (i.e., Atlantic Multidecadal Oscillation (AMO), El Niño Southern Oscillation (ENSO), Pacific North American pattern (PNA), and Pacific Decadal Oscillation (PDO)). The major GOM current, the Loop Current, feeds the Gulf Stream as it transports oceanic heat to the northern Atlantic Ocean. The northern GOM is the northernmost summer extent of the western hemisphere warm pool (WHWP) that drives oceanic moisture flux and precipitation into the Americas. Decadally-resolved foraminifera reconstructions from the northern GOM indicates SST was 2 to 4ºC colder on average than today during the Little Ice Age (LIA, 1850), whereas a subannually-resolved coral reconstruction from the southeastern GOM find 1.5 to 2ºC colder intervals and reduced areal extent of the WHWP on interannual time scales during some intervals of the LIA. However, records capable of resolving annual and subannual SST variability from the northern GOM, necessary for investigating WHWP northern extent, are still lacking. Here we present a new temperature reconstruction for the northern GOM derived from strontium-to-calcium (Sr/Ca) ratios of approximately monthly samples milled from a Siderastrea siderea coral core collected from the Flower Garden Banks National Marine Sanctuary (FGBNMS; 27° 52.5'N, 93° 49'W) growing at a water depth of 20 m. Coral Sr/Ca and δ18O is calibrated to reef temperature data from FGBNMS Hobotemp data loggers near the reef cap in 22 m water depth (1986-2004) and to NOAA OISST (1981-2004). Coral Sr/Ca co-varies with the reef temperature (r=0.95, p<0.05, n=146) and consistently captures winter values in reef temperature with slightly warmer summers (0.9ºC on average). Pseudocoral analysis is used to assess the relationships between SST and SSS in coral δ18O.

75 FR 16833 - Preliminary Revised 5-Year Outer Continental Shelf (OCS) Oil and Gas Leasing Program for 2007-2012

Federal Register 2010, 2011, 2012, 2013, 2014

2010-04-02

... Continental Shelf (OCS) Oil and Gas Leasing Program for 2007-2012 AGENCY: Minerals Management Service... (MMS) requests comments on the Preliminary Revised 5-Year OCS Oil and Gas Leasing Program for 2007... Elden Street, MS-4010; Herndon, Virginia 20170-4817. Please reference ``Remand of the 2007-2012 OCS Oil...

Volatile components and continental material of planets

NASA Technical Reports Server (NTRS)

Florenskiy, K. P.; Nikolayeva, O. V.

1986-01-01

It is shown that the continental material of the terrestrial planets varies in composition from planet to planet according to the abundances and composition of true volatiles (H20, CO2, etc.) in the outer shells of the planets. The formation of these shells occurs very early in a planet's evolution when the role of endogenous processes is indistinct and continental materials are subject to melting and vaporizing in the absence of an atmosphere. As a result, the chemical properties of continental materials are related not only to fractionation processes but also to meltability and volatility. For planets retaining a certain quantity of true volatile components, the chemical transformation of continental material is characterized by a close interaction between impact melting vaporization and endogeneous geological processes.

An oilspill risk analysis for the eastern Gulf of Mexico (proposed sale 65) Outer Continental Shelf lease area

USGS Publications Warehouse

Wyant, Timothy; Slack, James R.

1978-01-01

An oilspill risk analysis was conducted to determine the relative environmental hazards of developing oil in different regions of the Eastern Gulf of Mexico Outer Continental Shelf lease area. The study analyzed the probability of spill occurrence, likely paths of the spills, and locations in space and time of such objects as recreational and biological resources likely to be vulnerable. These results combined to yield estimates of the overall oilspill risk associated with development of the proposed lease area. This risk is compared to the existing oilspill risk from existing leases in the area. The analysis implicitly includes estimates of weathering rates and slick dispersion and an indication of the possible mitigating effects of cleanups.

Graphene oxide membrane as an efficient extraction and ionization substrate for spray-mass spectrometric analysis of malachite green and its metabolite in fish samples.

PubMed

Wei, Shih-Chun; Fan, Shen; Lien, Chia-Wen; Unnikrishnan, Binesh; Wang, Yi-Sheng; Chu, Han-Wei; Huang, Chih-Ching; Hsu, Pang-Hung; Chang, Huan-Tsung

2018-03-20

A graphene oxide (GO) nanosheet-modified N + -nylon membrane (GOM) has been prepared and used as an extraction and spray-ionization substrate for robust mass spectrometric detection of malachite green (MG), a highly toxic disinfectant in liquid samples and fish meat. The GOM is prepared by self-deposition of GO thin film onto an N + -nylon membrane, which has been used for efficient extraction of MG in aquaculture water samples or homogenized fish meat samples. Having a dissociation constant of 2.17 × 10 -9  M -1 , the GOM allows extraction of approximately 98% of 100 nM MG. Coupling of the GOM-spray with an ion-trap mass spectrometer allows quantitation of MG in aquaculture freshwater and seawater samples down to nanomolar levels. Furthermore, the system possesses high selectivity and sensitivity for the quantitation of MG and its metabolite (leucomalachite green) in fish meat samples. With easy extraction and efficient spray ionization properties of GOM, this membrane spray-mass spectrometry technique is relatively simple and fast in comparison to the traditional LC-MS/MS methods for the quantitation of MG and its metabolite in aquaculture products. Copyright © 2017 Elsevier B.V. All rights reserved.

Evaluation of the KCl Denuder Method for Gaseous Oxidized Mercury using HgBr2 at an In-Service AMNet Site

NASA Astrophysics Data System (ADS)

McClure, Crystal

During the summer of 2013, we examined the performance of KCl-coated denuders for measuring gaseous oxidized mercury (GOM) by calibrating with a known source of GOM (i.e., HgBr2) at the North Birmingham SouthEastern Aerosol Research and Characterization (SEARCH) site. We found that KCl-coated denuders have near 95% collection efficiency for HgBr2 in zero air (i.e., air scrubbed of mercury and ozone). However, in ambient air, the efficiency of KCl-coated denuders in capturing HgBr2 dropped to 20-54%. We also found that absolute humidity and ozone each demonstrate a significant inverse correlation with HgBr2 recovery in ambient air. Subsequent laboratory tests with HgBr2 and the KCl-coated denuder show that ozone and absolute humidity cause the release of gaseous elemental Hg from the denuder and thus appear to explain the low recovery in ambient air. Based on these findings, we infer that the KCl denuder method underestimates atmospheric GOM concentrations. A calibration system is needed to accurately measure GOM. The system described in this paper for HgBr2 could be implemented with existing mercury speciation instrumentation and this would improve our knowledge of the response to one potentially important GOM compound.

78 FR 4167 - Commercial Wind Lease Issuance on the Atlantic Outer Continental Shelf Offshore Delaware

Federal Register 2010, 2011, 2012, 2013, 2014

2013-01-18

... issued a commercial wind energy lease to Bluewater Wind Delaware LLC (Bluewater) for an area of the Outer... availability of the executed lease. The total acreage of the lease area is approximately 96,430 acres. The lease area comprises 11 full OCS blocks and 95 sub-blocks and lies within Official Protraction Diagram...

30 CFR 285.630 - [Reserved

Code of Federal Regulations, 2010 CFR

2010-07-01

... OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Plans and Information Requirements Contents of the Construction and Operations Plan § 285.630 [Reserved] Activities Under an Approved COP ...

33 CFR 142.21 - Purpose and applicability.

Code of Federal Regulations, 2010 CFR

2010-07-01

...) OUTER CONTINENTAL SHELF ACTIVITIES WORKPLACE SAFETY AND HEALTH Personal Protective Equipment § 142.21 Purpose and applicability. This subpart prescribes requirements concerning personal protection on OCS...

33 CFR 142.21 - Purpose and applicability.

Code of Federal Regulations, 2011 CFR

2011-07-01

...) OUTER CONTINENTAL SHELF ACTIVITIES WORKPLACE SAFETY AND HEALTH Personal Protective Equipment § 142.21 Purpose and applicability. This subpart prescribes requirements concerning personal protection on OCS...

75 FR 63504 - Outer Continental Shelf, Alaska OCS Region, Chukchi Sea Planning Area, Oil and Gas Lease Sale 193

Federal Register 2010, 2011, 2012, 2013, 2014

2010-10-15

... Continental Shelf, Alaska OCS Region, Chukchi Sea Planning Area, Oil and Gas Lease Sale 193 AGENCY: Bureau of... development; (2) determine whether missing information identified by BOEMRE in the 193 FEIS was essential or... in the FEIS for Chukchi Sea Lease Sale 193 was essential or relevant under 40 CFR 1502.22; and (3...

76 FR 30956 - Outer Continental Shelf, Alaska OCS Region, Chukchi Sea Planning Area, Oil and Gas Lease Sale 193

Federal Register 2010, 2011, 2012, 2013, 2014

2011-05-27

... Continental Shelf, Alaska OCS Region, Chukchi Sea Planning Area, Oil and Gas Lease Sale 193 AGENCY: Bureau of...: BOEMRE announces the availability of a Revised Draft SEIS, OCS Oil and Gas Lease Sale 193, Chukchi Sea.... The Revised Draft SEIS augments the analysis of the Final EIS, Oil and Gas Lease Sale 193, Chukchi Sea...

Diversity and toxicity of the diatom Pseudo-nitzschia Peragallo in the Gulf of Maine, Northwestern Atlantic Ocean

PubMed Central

Fernandes, Luciano F.; Hubbard, Katherine A.; Richlen, Mindy L.; Smith, Juliette; Bates, Stephen S.; Ehrman, James; Léger, Claude; Mafra, Luiz L.; Kulis, David; Quilliam, Michael; Libera, Katie; McCauley, Linda; Anderson, Donald M.

2014-01-01

Multiple species in the toxic marine diatom genus Pseudo-nitzschia have been identified in the Northwestern Atlantic region encompassing the Gulf of Maine (GOM), including the Bay of Fundy (BOF). To gain further knowledge of the taxonomic composition and toxicity of species in this region, Pseudo-nitzschia isolates (n=146) were isolated from samples collected during research cruises that provided broad spatial coverage across the GOM and the southern New England shelf, herein referred to as the GOM region, during 2007-2008. Isolates, and cells in field material collected at 38 stations, were identified using electron microscopy (EM). Eight species (P. americana, P. fraudulenta, P. subpacifica, P. heimii, P. pungens, P. seriata, P. delicatissima and P. turgidula), and a novel form, Pseudo-nitzschia sp. GOM, were identified. Species identity was confirmed by sequencing the large subunit of the ribosomal rDNA (28S) and the internal transcribed spacer 2 (ITS2) for six species (36 isolates). Phylogenetic analyses (including neighbor joining, maximum parsimony, and maximum likelihood estimates and ITS2 secondary structure analysis) and morphometric data supported the placement of P. sp. GOM in a novel clade that includes morphologically and genetically similar isolates from Australia and Spain and is genetically most similar to P. pseudodelicatissima and P. cuspidata. Seven species (46 isolates) were grown in nutrient-replete batch culture and aliquots consisting of cells and growth medium were screened by Biosense ASP ELISA to measure total domoic acid (DA) produced (intracellular + extracellular); P. americana and P. heimii were excluded from all toxin analyses as they did not persist in culture long enough for testing. All 46 isolates screened produced DA in culture and total DA varied among species (e.g., 0.04 to 320 ng ml-1 for P. pungens and P. sp. GOM isolates, respectively) and among isolates of the same species (e.g., 0.24 – 320 ng ml-1 for P. sp. GOM). The 15 most toxic isolates corresponded to P. seriata, P. sp. GOM and P. pungens, and fg DA cell-1 was determined for whole cultures (cells and medium) using ELISA and liquid chromatography (LC) with fluorescence detection (FLD); for seven isolates, toxin levels were also estimated using LC - with mass spectrometry and ultraviolet absorbance detection. Pseudo-nitzschia seriata was the most toxic species (up to 3,500 fg cell-1) and was observed in the GOM region during all cruises (i.e., during the months of April, May, June and October). Pseudo-nitzschia sp. GOM, observed only during September and October 2007, was less toxic (19 – 380 fg cell-1) than P. seriata but more toxic than P. pungens var. pungens (0. 4 fg cell-1). Quantitation of DA indicated that concentrations measured by LC and ELISA were positively and significantly correlated; the lower detection limit of the ELISA permitted quantification of toxicity in isolates that were found to be nontoxic with LC methods. The confirmation of at least seven toxic species and the broad spatial and temporal distribution of toxic Pseudo-nitzschia spp. have significant implications for the regional management of nearshore and offshore shellfisheries resources. PMID:25143669

Estimation of speciated and total mercury dry deposition at monitoring locations in eastern and central North America

USGS Publications Warehouse

Zhang, L.; Blanchard, P.; Gay, D.A.; Prestbo, E.M.; Risch, M.R.; Johnson, D.; Narayan, J.; Zsolway, R.; Holsen, T.M.; Miller, E.K.; Castro, M.S.; Graydon, J.A.; St. Louis, V.L.; Dalziel, J.

2012-01-01

Dry deposition of speciated mercury, i.e., gaseous oxidized mercury (GOM), particulate-bound mercury (PBM), and gaseous elemental mercury (GEM), was estimated for the year 2008–2009 at 19 monitoring locations in eastern and central North America. Dry deposition estimates were obtained by combining monitored two- to four-hourly speciated ambient concentrations with modeled hourly dry deposition velocities (Vd) calculated using forecasted meteorology. Annual dry deposition of GOM+PBM was estimated to be in the range of 0.4 to 8.1 μg m−2 at these locations with GOM deposition being mostly five to ten times higher than PBM deposition, due to their different modeled Vd values. Net annual GEM dry deposition was estimated to be in the range of 5 to 26 μg m−2 at 18 sites and 33 μg m−2 at one site. The estimated dry deposition agrees very well with limited surrogate-surface dry deposition measurements of GOM and PBM, and also agrees with litterfall mercury measurements conducted at multiple locations in eastern and central North America. This study suggests that GEM contributes much more than GOM+PBM to the total dry deposition at the majority of the sites considered here; the only exception is at locations close to significant point sources where GEM and GOM+PBM contribute equally to the total dry deposition. The relative magnitude of the speciated dry deposition and their good comparisons with litterfall deposition suggest that mercury in litterfall originates primarily from GEM, which is consistent with the limited number of previous field studies. The study also supports previous analyses suggesting that total dry deposition of mercury is equal to, if not more important than, wet deposition of mercury on a regional scale in eastern North America.

33 CFR 142.81 - Purpose and applicability.

Code of Federal Regulations, 2010 CFR

2010-07-01

...) OUTER CONTINENTAL SHELF ACTIVITIES WORKPLACE SAFETY AND HEALTH General Workplace Conditions § 142.81 Purpose and applicability. This subpart prescribes requirements relating to general working conditions on...

Estimating the Provision of Ecosystem Services by Gulf of Mexico Coastal Wetlands.

EPA Science Inventory

Gulf of Mexico (GOM) coastal wetlands contribute to human well-being by providing many ecosystem services (e.g., commercial and recreational fishery support, protection of coastal communities from storm surge, water quality improvement, and carbon sequestration). The GOM region c...

33 CFR 135.3 - Applicability.

Code of Federal Regulations, 2011 CFR

2011-07-01

... POLLUTION FINANCIAL RESPONSIBILITY AND COMPENSATION OFFSHORE OIL POLLUTION COMPENSATION FUND General § 135.3...) Sustains an economic loss as a consequence of oil pollution arising from Outer Continental Shelf activities...

30 CFR 250.903 - What records must I keep?

Code of Federal Regulations, 2010 CFR

2010-07-01

... SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Platforms and Structures General Requirements for... platform safety, structural reliability, or operating capabilities. Items such as steel brackets, deck...

The Role of Transforms in Gulf of Mexico Opening

NASA Astrophysics Data System (ADS)

Lundin, E.; Doré, A. G.

2017-12-01

The curious pie-shaped Gulf of Mexico (GoM) may be considered a high-angle back-arc basin to the Pacific Ocean. Opening was strongly facilitated by transforms, including a terminal transform on its Pacific side. GoM also formed synchronously with the nearby Central Atlantic when Gondwanaland pulled away from Laurasia in the Jurassic. Notably, GoM's oceanic crust never connected with that of the Atlantic, and the isolated nature of this small ocean led to periodically confined conditions that influenced the petroleum system. Of particular importance are the deposition of Callovian age salt and Tithonian age source rocks. The central part of GoM is generally accepted as underlain by oceanic crust, but the position of the continent-ocean boundaries (COB) is debated, as well as the nature of intervening crust. We favor an interpretation of the COBs marked by the regional scale, large-amplitude Houston, Florida, and Campeche magnetic anomalies, in turn probably reflecting seaward dipping reflectors of magma-rich margins. GoM's unusual shape may indirectly represent utilization of pre-existing transforms during the break-up of Pangea. Transforms represent long, linear weaknesses where the crust and lithosphere is already broken. Transforms seem to have governed the break-up of several oceanic segments in the North Atlantic and Arctic. The Suwanne suture of the Rheic Ocean is a pronounced magnetic anomaly that crosses Georgia-Florida and becomes aligned with the Houston magnetic anomaly, which here is interpreted as the northern COB to GoM. The Suwanne suture is oriented at high angle to the rest of the Rheic suture along the Appalachians and probably experienced lateral motion during the transpressional closure of the Rheic Ocean. This transform arguably represents a weak element in the Ouachita-Marathon orogen that allowed the Yucatan microcontinent to easily be plucked from the North American margin during the dispersal of Pangea, forming the GoM in the process. This opening mode is analogous to that of the pie-shaped Iceland Basin and the Jan Mayen microcontinent in the Northeast Atlantic.

Subsurface gas hydrates in the northern Gulf of Mexico

USGS Publications Warehouse

Boswell, Ray; Collett, Timothy S.; Frye, Matthew; Shedd, William; McConnell, Daniel R.; Shelander, Dianna

2012-01-01

The northernGulf of Mexico (GoM) has long been a focus area for the study of gashydrates. Throughout the 1980s and 1990s, work focused on massive gashydrates deposits that were found to form at and near the seafloor in association with hydrocarbon seeps. However, as global scientific and industrial interest in assessment of the drilling hazards and resource implications of gashydrate accelerated, focus shifted to understanding the nature and abundance of "buried" gashydrates. Through 2005, despite the drilling of more than 1200 oil and gas industry wells through the gashydrate stability zone, published evidence of significant sub-seafloor gashydrate in the GoM was lacking. A 2005 drilling program by the GoM GasHydrate Joint Industry Project (the JIP) provided an initial confirmation of the occurrence of gashydrates below the GoM seafloor. In 2006, release of data from a 2003 industry well in Alaminos Canyon 818 provided initial documentation of gashydrate occurrence at high concentrations in sand reservoirs in the GoM. From 2006 to 2008, the JIP facilitated the integration of geophysical and geological data to identify sites prospective for gashydrate-bearing sands, culminating in the recommendation of numerous drilling targets within four sites spanning a range of typical deepwater settings. Concurrent with, but independent of, the JIP prospecting effort, the Bureau of Ocean Energy Management (BOEM) conducted a preliminary assessment of the GoM gashydratepetroleum system, resulting in an estimate of 607 trillion cubic meters (21,444 trillion cubic feet) gas-in-place of which roughly one-third occurs at expected high concentrations in sand reservoirs. In 2009, the JIP drilled seven wells at three sites, discovering gashydrate at high saturation in sand reservoirs in four wells and suspected gashydrate at low to moderate saturations in two other wells. These results provide an initial confirmation of the complex nature and occurrence of gashydrate-bearing sands in the GoM, the efficacy of the integrated geological/geophysical prospecting approach used to identify the JIP drilling sites, and the relevance of the 2008 BOEM assessment.

Knowledge gained from analyzing mercury speciation data monitored in North America

NASA Astrophysics Data System (ADS)

Zhang, L.; Cheng, I.; Gay, D. A.; Xu, X.; Wu, Z.

2017-12-01

This presentation summarizes knowledge gained in several recent studies through analysis and application of mercury (Hg) speciation data monitored in North America. Annual Hg dry deposition to vegetated surfaces in the rural or remote environment in North America was dominated by leaf uptake of gaseous elemental mercury (GEM), contrary to what was commonly assumed in earlier studies which frequently omitted GEM dry deposition as an important process (Zhang et al., EST, 2016). Dry deposition exceeded wet deposition by a large margin in all of the seasons except in the summer at the majority of the sites. Based on the gaseous oxidized mercury (GOM) concentrations predicted from measured Hg wet deposition using a scavenging ratio method, multi-year average GOM concentrations collected using Tekran speciation instrument were likely biased low by a factor of 2 at about half of the studied sites (Cheng and Zhang, EST, 2017). A decline in the number of source regions impacting ambient GEM and GOM was found from 2005-2014 at an eastern U.S. site through concentration-weighted trajectory (CWT) analysis (Cheng et al., JAS, 2017). Source contributions decreased by up to 20% for GEM, greater than 60% for GOM, and 20-60% for PBM in 2011-2014 than in 2006-2008, largely due to power plant Hg emission reductions since 2009. A study comparing Positive Matrix Factorization (PMF) and Principal Components Analysis (PCA) receptor methods identified similar sources impacting Kejimkujik National Park, Canada, including combustion, industrial sulfur, photochemistry and re-emissions, and oceanic sea-salt emissions. Improving the quality of the Hg data used in receptor methods by imputation did not improve the PMF results, but reducing the fraction of below detection limit data was effective (Xu et al., ACP, 2017). PCA results using reactive mercury (RM=GOM+PBM) or excluding low GOM values were similar to those using the original data. Source contributions from CWT analysis were more sensitive to the use of RM than excluding low GOM values (Cheng et al., ACP, 2016). Future research needs are recommended for improving the understanding of speciated atmospheric mercury based on a series of recently published review papers (Zhang et al., ACP, 2017).

Jurassic, slow-spreading ridge in the southeast Gulf of Mexico and its along-strike morpho-volcanic expression explained by a two-phase opening model

NASA Astrophysics Data System (ADS)

Lin, P.; Mann, P.

2016-12-01

Previous workers have used extensive grids of 2D seismic reflection data to describe the width, structural character, and adjacent oceanic crust of the late Jurassic, slow-spreading ridge in the southeast Gulf of Mexico (SEGOM). Characteristics of the now-buried SEGOM slow spreading ridge include: 1) wide, axial valley segments ranging from 5-20 km; 2) alternating, deep, axial valley segments up to 2 km in depth; 3) normal faults dipping towards the axial valleys; and 4) isolated seamounts within the axial valleys projecting 1 km above regional oceanic basement depth and reflecting along-strike variations in the ridge's magmatic supply. We have used additional seismic reflection, gravity, and magnetic data to map the ridge and its environs to its southern termination, a 2.6-km-high seamount - informally named here Buffler seamount. The southernmost, 427-km long section of the SEGOM ridge from Buffler seamount northwest to the southwestern limit of the DeSoto Canyon arch can be divided into four alternating ridge segments with two distinctive morphologies: 1) wide and deep axial valleys lying below regional oceanic basement depth and characterized by gravity high and magnetic lows; and 2) elevated, linear areas of clustered, seamounts characterized by gravity low and magnetic highs. The continental margins of both Yucatan and Florida exhibit a prominent N60E magnetic fabric created by Phase 1, NW-SE Triassic-early Jurassic continental rifting of the GOM that was subsequently offset at right angles by Phase 2, NE-SW late Jurassic stretching and oceanic spreading. Removal of the V-shaped area of oceanic crust of the SEGOM shows that the wide, axial valleys of the late Jurassic spreading ridge coincide with rifted areas of thicker crust on the "arches" or horst blocks of Triassic-early Jurassic, Phase 1 rifting (Sarasota, Middle Ground) while the elevated areas of elevated and clustered seamounts coincide with thinner crust of the intervening rifts (Apalachicola, Tampa, South Florida). The later SW-NE re-rifting of crust during the late Jurassic that was rifted earlier in the Triassic and early Jurassic in a NW-SE direction is supportive of the widely accepted two-phase opening model for the SEGOM and GOM as a whole.

30 CFR 285.817-285.819 - [Reserved

Code of Federal Regulations, 2010 CFR

2010-07-01

... Equipment Failure and Adverse Environmental Effects §§ 285.817-285.819 [Reserved] Inspections and... ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Environmental and Safety...

Millennial- to century-scale variability in Gulf of Mexico Holocene climate records

USGS Publications Warehouse

Poore, R.Z.; Dowsett, H.J.; Verardo, S.; Quinn, T.M.

2003-01-01

Proxy records from two piston cores in the Gulf of Mexico (GOM) provide a detailed (50-100 year resolution) record of climate variability over the last 14,000 years. Long-term (millennial-scale) trends and changes are related to the transition from glacial to interglacial conditions and movement of the average position of the Intertropical Convergence Zone (ITCZ) related to orbital forcing. The ??18O of the surface-dwelling planktic foraminifer Globigerinoides ruber show negative excursions between 14 and 10.2 ka (radiocarbon years) that reflect influx of meltwater into the western GOM during melting of the Laurentide Ice Sheet. The relative abundance of the planktic foraminifer Globigerinoides sacculifer is related to transport of Caribbean water into the GOM. Maximum transport of Caribbean surface waters and moisture into the GOM associated with a northward migration of the average position of the ITCZ occurs between about 6.5 and 4.5 ka. In addition, abundance variations of G. sacculifer show century-scale variability throughout most of the Holocene. The GOM record is consistent with records from other areas, suggesting that century-scale variability is a pervasive feature of Holocene climate. The frequency of several cycles in the climate records is similar to cycles identified in proxy records of solar variability, indicating that at least some of the century-scale climate variability during the Holocene is due to external (solar) forcing.

The Subject of Data in Submissions to the CLCS: Documenting the outer limits of the Northern Continental Shelf of the Faroe Islands

NASA Astrophysics Data System (ADS)

Vang Heinesen, Martin; Mørk, Finn

2017-04-01

The first partial submissions made by the Kingdom of Denmark, in respect of the continental shelf north of the Faroe Islands (North Faroe Margin, NFM), was submitted to the Commission on the Limits of the Continental Shelf in April 2009 as the result of 7 years of preparation which also included 4 additional continental shelf regions around the Faroe Islands and Greenland, on which individual partial submissions were made subsequently. The NFM covers parts of the NW European continental margin, it continues onto the Faroe-Iceland Ridge and the extinct Ægir (spreading) Ridge and overlaps with the continental margin of Iceland and Norway in the sediment rich Ægir Basin located between the European margin to the south and south-east, and the Jan Mayen Micro-continental margin to the west and north-west. Prior to the onset of the continental shelf project of the Kingdom of Denmark, arrangements had already been made with Norway and Iceland regarding the sharing of existing data and acquisition of new seismic data in the overlapping regions. Before that, the main database in the area included a comprehensive multi-beam bathymetric data set covering large parts of the Ægir Ridge with scattered single beam bathymetric lines in the remaining regions. It also comprised a number of single- and multi-channel seismic lines and a long refraction seismic line transecting the entire eastern part of the basin, from the Norwegian shelf to the Ægir Ridge, in addition to local side scan sonar and regional potential field data. During the project, additional high quality multi-channel seismic data, extensive multi-beam bathymetric data, and a comprehensive high resolution aeromagnetic dataset were acquired, allowing detailed mapping of the morphological and geological nature of the margin, including accurate identification of the base of the continental slope and mapping of the sediment thickness and sediment continuation in the basin. This data proved to be crucial for the documentation to the CLCS of the outer limits of the continental shelf to the north of the Faroe Islands.

From hyperextended rift to convergent margin types: mapping the outer limit of the extended Continental Shelf of Spain in the Galicia area according UNCLOS Art. 76

NASA Astrophysics Data System (ADS)

Somoza, Luis; Medialdea, Teresa; Vázquez, Juan T.; González, Francisco J.; León, Ricardo; Palomino, Desiree; Fernández-Salas, Luis M.; Rengel, Juan

2017-04-01

Spain presented on 11 May 2009 a partial submission for delimiting the extended Continental Shelf in respect to the area of Galicia to the Commission on the Limits of the Continental Shelf (CLCS). The Galicia margin represents an example of the transition between two different types of continental margins (CM): a western hyperpextended margin and a northern convergent margin in the Bay of Biscay. The western Galicia Margin (wGM 41° to 43° N) corresponds to a hyper-extended rifted margin as result of the poly-phase development of the Iberian-Newfoundland conjugate margin during the Mesozoic. Otherwise, the north Galicia Margin (nGM) is the western end of the Cenozoic subduction of the Bay of Biscay along the north Iberian Margin (NIM) linked to the Pyrenean-Mediterranean collisional belt Following the procedure established by the CLCS Scientific and Technical Guidelines (CLCS/11), the points of the Foot of Slope (FoS) has to be determined as the points of maximum change in gradient in the region defined as the Base of the continental Slope (BoS). Moreover, the CLCS guidelines specify that the BoS should be contained within the continental margin (CM). In this way, a full-coverage multibeam bathymetry and an extensive dataset of up 4,736 km of multichannel seismic profiles were expressly obtained during two oceanographic surveys (Breogham-2005 and Espor-2008), aboard the Spanish research vessel Hespérides, to map the outer limit of the CM.In order to follow the criteria of the CLCS guidelines, two types of models reported in the CLCS Guidelines were applied to the Galicia Margin. In passive margins, the Commission's guidelines establish that the natural prolongation is based on that "the natural process by which a continent breaks up prior to the separation by seafloor spreading involves thinning, extension and rifting of the continental crust…" (para. 7.3, CLCS/11). The seaward extension of the wGM should include crustal continental blocks and the so-called Peridotite Ridge (PR), composed by serpentinized exhumed continental mantle. Thus, the PR should be regarded as a natural component of the continental margin since these seafloor highs were formed by hyperextension of the margin. Regarding convergent margins, the architecture of the nGM can be classified according the CLCS/11 as a "poor- or non-accretionary convergent continental margin" characterized by a poorly developed accretionary wedge, which is composed of: a large sedimentary apron mainly formed by large slumps and thrust wedges of igneous (ophiolitic/continental) body overlying subducting oceanic crust (Fig. 6.1B, CLCS/11). According to para. 6.3.6. (CLCS/11), the seaward extent of this type of continental convergent margins is defined by the seaward edge of the accretionary wedge. Applying this definition, the seaward extent of the margin is defined by the outer limit of the ophiolitic deformed body that marks the edge of the accretionary wedge. These geological criteria were strictly applied for mapping the BoS region, where the FoS were determinate by using the maximum change in gradient within this mapped region. Acknowledgments: Project for the Extension of the Spanish Continental according UNCLOS (CTM2010-09496-E) and Project CTM2016-75947-R

30 CFR 250.1614 - Mud program.

Code of Federal Regulations, 2011 CFR

2011-07-01

... OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Sulphur Operations § 250.1614... shall comply with requirements concerning mud control, mud test and monitoring equipment, mud quantities...

30 CFR 285.1008-285.1009 - [Reserved

Code of Federal Regulations, 2010 CFR

2010-07-01

... ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights of Use and Easement for Energy- and Marine-Related Activities Using Existing OCS Facilities Requesting An Alternate Use...

Metabolic Roles of Uncultivated Bacterioplankton Lineages in the Northern Gulf of Mexico “Dead Zone”

PubMed Central

Seitz, Kiley W.; Temperton, Ben; Gillies, Lauren E.; Rabalais, Nancy N.; Henrissat, Bernard; Mason, Olivia U.

2017-01-01

ABSTRACT Marine regions that have seasonal to long-term low dissolved oxygen (DO) concentrations, sometimes called “dead zones,” are increasing in number and severity around the globe with deleterious effects on ecology and economics. One of the largest of these coastal dead zones occurs on the continental shelf of the northern Gulf of Mexico (nGOM), which results from eutrophication-enhanced bacterioplankton respiration and strong seasonal stratification. Previous research in this dead zone revealed the presence of multiple cosmopolitan bacterioplankton lineages that have eluded cultivation, and thus their metabolic roles in this ecosystem remain unknown. We used a coupled shotgun metagenomic and metatranscriptomic approach to determine the metabolic potential of Marine Group II Euryarchaeota, SAR406, and SAR202. We recovered multiple high-quality, nearly complete genomes from all three groups as well as candidate phyla usually associated with anoxic environments—Parcubacteria (OD1) and Peregrinibacteria. Two additional groups with putative assignments to ACD39 and PAUC34f supplement the metabolic contributions by uncultivated taxa. Our results indicate active metabolism in all groups, including prevalent aerobic respiration, with concurrent expression of genes for nitrate reduction in SAR406 and SAR202, and dissimilatory nitrite reduction to ammonia and sulfur reduction by SAR406. We also report a variety of active heterotrophic carbon processing mechanisms, including degradation of complex carbohydrate compounds by SAR406, SAR202, ACD39, and PAUC34f. Together, these data help constrain the metabolic contributions from uncultivated groups in the nGOM during periods of low DO and suggest roles for these organisms in the breakdown of complex organic matter. PMID:28900024

Genetic connectivity in scleractinian corals across the Northern Gulf of Mexico: oil/gas platforms, and relationship to the Flower Garden Banks.

PubMed

Sammarco, Paul W; Brazeau, Daniel A; Sinclair, James

2012-01-01

The 3,000 oil/gas structures currently deployed in the northern Gulf of Mexico (GOM) provide hard substratum for marine organisms in a region where such has been rare since the Holocene. The major exception to this are the Flower Garden Banks (FGB). Corals are known to have colonized oil/gas platforms around the FGB, facilitating biogeographic expansion. We ask the question, what are the patterns of genetic affinity in these coral populations. We sampled coral tissue from populations of two species occurring on oil and gas platforms: Madracis decactis (hermatype) and Tubastraea coccinea (invasive ahermatype). We sampled 28 platforms along four transects from 20 km offshore to the continental shelf edge off 1) Matagorda Island, TX; 2) Lake Sabine, TX; 3) Terrebonne Bay, LA; and 4) Mobile, AL. The entire population of M. decactis was sampled between depths of 5 m and 37 m. T. coccinea populations were sub-sampled. Genetic variation was assessed using the PCR-based Amplified Fragment Length Polymorphisms (AFLPs). Data were analyzed via AFLPOP and STRUCTURE. Genetic connectivity among M. decactis platform populations was highest near the FGB and decreased to the east. Connectivity increased again in the eastern sector, indicating isolation between the populations from different sides of the Mississippi River (Transects 3 and 4). A point-drop in genetic affinity (relatedness) at the shelf edge south of Terrebonne Bay, LA indicated a population differing from all others in the northern GOM. Genetic affinities among T. coccinea were highest in the west and decreased to the east. Very low genetic affinities off Mobile, AL indicated a dramatic difference between those populations and those west of the Mississippi River, apparently a formidable barrier to larval dispersal.

Genetic Connectivity in Scleractinian Corals across the Northern Gulf of Mexico: Oil/Gas Platforms, and Relationship to the Flower Garden Banks

PubMed Central

Sammarco, Paul W.; Brazeau, Daniel A.; Sinclair, James

2012-01-01

The 3,000 oil/gas structures currently deployed in the northern Gulf of Mexico (GOM) provide hard substratum for marine organisms in a region where such has been rare since the Holocene. The major exception to this are the Flower Garden Banks (FGB). Corals are known to have colonized oil/gas platforms around the FGB, facilitating biogeographic expansion. We ask the question, what are the patterns of genetic affinity in these coral populations. We sampled coral tissue from populations of two species occurring on oil and gas platforms: Madracis decactis (hermatype) and Tubastraea coccinea (invasive ahermatype). We sampled 28 platforms along four transects from 20 km offshore to the continental shelf edge off 1) Matagorda Island, TX; 2) Lake Sabine, TX; 3) Terrebonne Bay, LA; and 4) Mobile, AL. The entire population of M. decactis was sampled between depths of 5 m and 37 m. T. coccinea populations were sub-sampled. Genetic variation was assessed using the PCR-based Amplified Fragment Length Polymorphisms (AFLPs). Data were analyzed via AFLPOP and STRUCTURE. Genetic connectivity among M. decactis platform populations was highest near the FGB and decreased to the east. Connectivity increased again in the eastern sector, indicating isolation between the populations from different sides of the Mississippi River (Transects 3 and 4). A point-drop in genetic affinity (relatedness) at the shelf edge south of Terrebonne Bay, LA indicated a population differing from all others in the northern GOM. Genetic affinities among T. coccinea were highest in the west and decreased to the east. Very low genetic affinities off Mobile, AL indicated a dramatic difference between those populations and those west of the Mississippi River, apparently a formidable barrier to larval dispersal. PMID:22558066

Preliminary Micropaleontological Investigation of a Preserved, Late Pleistocene Cypress Forest on the Northern Gulf of Mexico Inner Shelf

NASA Astrophysics Data System (ADS)

Truong, J. T.; DeLong, K. L.; Bentley, S. J.; Xu, K.; Harley, G. L.; Reese, A.; Gonzalez, S.; Obelcz, J.; Caporaso, A.

2017-12-01

Exposed at the bottom of a trough 13 km offshore Orange Beach, AL on the Gulf of Mexico (GOM) shelf in 18 m water depth are exceptionally preserved in situ bald cypress (Taxodium distichum) stumps. Preserved seeds (T. distichum, Cephalanthus occidentalis, Hibiscus lasiocarpos, Liquidambar styraciflua) discovered in core catcher samples illustrate the exceptional preservation of the site. Woody debris samples have come back radiocarbon dead with an exception to samples located in the upper peat layer with 14C ages from 37,350-41,830 years BP. Optically stimulated luminescence and 14C dates, in combination with GOM eustatic sea level curves, suggest the forest was located 30 m above the paleoshoreline. How the forest remained preserved during subaerial exposure of the continental shelf through the Last Glacial Maximum lowstand until ensuing Holocene sea level transgression remains unknown. The R/V Coastal Profiler collected 7 vibracores from the study site in 2015 and an additional 11 in 2016. A single core (DF1) contains facies identified as the Holocene Mississippi-Alabama-Florida sand sheet, a transitional facies of interbedded sand and mud, and a basal floodplain facies in which the stumps reside. This study seeks to identify the location of the Pleistocene-Holocene unconformity and to assist in stratigraphy of the area. Foraminiferal assemblages found within the transitional facies are of a shallow marine environment that suggests Holocene in age. It is hypothesized that a pulse of sea level rise during Marine Isotope Stages 3-4 caused subsequent rapid aggradation of the paleovalley system allowing for preservation through >30 kyrs of subaerial exposure. One of the ultimate goals of this study is to serve as a guide for identification of other possible sites along the gulf coast.

Summary of environmental geologic studies in the Mid-Atlantic outer continental shelf area; results of 1978-1979 field seasons

USGS Publications Warehouse

Robb, James M.

1983-01-01

Because of the need for knowledge of an offshore area that is undergoing exploration for oil and gas resources, since 1975 the U.S. Bureau of Land Management (BLM) has funded studies of the environmental characteristics of the Mid-Atlantic Outer Continental Shelf. This volume briefly summarizes a final report to the BLM on the results of U.S. Geological Survey investigations stemming from data acquired during 1978 and 1979. The parent final report contains complete accounts of those investigations. The subjects of the studies range from the geologic effects of water currents and their capabilities of erosion and transportation, to delineation of potentially hazardous geologic characteristics of the area. Nine specific studies address the complexities of water currents, the nature of materials suspended in the sea waters, rates of mixing-in of material deposited on the bottom, and the sites of probable deposition of such materials, as well as sites and mechanisms of possible submarine landsliding or unstable bottom (engineering characteristics) of the Continental Slope and shelf.

78 FR 73882 - Notice of Determination of No Competitive Interest, Offshore Virginia

Federal Register 2010, 2011, 2012, 2013, 2014

2013-12-09

... energy research activities, including wind turbine installation and operational testing and installation... a Proposed Outer Continental Shelf (OCS) Wind Energy Research Lease Offshore Virginia. SUMMARY: This...

30 CFR 285.1001-285.1003 - [Reserved

Code of Federal Regulations, 2010 CFR

2010-07-01

... ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights of Use and Easement for Energy- and Marine-Related Activities Using Existing OCS Facilities Regulated Activities §§ 285...

75 FR 71734 - Outer Continental Shelf (OCS), Scientific Committee (SC)

Federal Register 2010, 2011, 2012, 2013, 2014

2010-11-24

... program covers a wide range of field and laboratory studies in biology, chemistry, and physical... SC has 15 vacancies in the following disciplines: Biological oceanography/marine biology; social...

Regional geologic framework off northeastern United States

USGS Publications Warehouse

Schlee, J.; Behrendt, John C.; Grow, J.A.; Robb, James M.; Mattick, R.; Taylor, P.T.; Lawson, B.J.

1976-01-01

Six multichannel seismic-reflection profiles taken across the Atlantic continental margin Previous HitoffTop the northeastern United States show an excess of 14 km of presumed Mesozoic and younger sedimentary rocks in the Baltimore Canyon trough and 8 km in the Georges Bank basin. Beneath the continental rise, the sedimentary prism thickness exceeds 7 km south of New Jersey and Maryland, and it is 4.5 km thick south of Georges Bank. Stratigraphically, the continental slope--outer edge of the continental shelf is a transition zone of high-velocity sedimentary rock, probably carbonate, that covers deeply subsided basement. Acoustically, the sedimentary sequence beneath the shelf is divided into three units which are correlated speculatively with the Cenozoic, the Cretaceous, and the Jurassic-Triassic sections. These units thicken offshore, and some have increased seismic velocities farther offshore. The uppermost unit thickens from a fraction of a kilometer to slightly more than a kilometer in a seaward direction, and velocity values range from 1.7 to 2.2 km/sec. The middle unit thickens from a fraction of a kilometer to as much as 5 km (northern Baltimore Canyon trough), and seismic velocity ranges from 2.2 to 5.4 km/sec. The lowest unit thickens to a maximum of 9 km (northern Baltimore Canyon), and velocities span the 3.9 to 5.9-km/sec interval. The spatial separation of magnetic and gravity anomalies on line 2 (New Jersey) suggests that in the Baltimore Canyon region the magnetic-slope anomaly is due to edge effects and that the previously reported free-air and isostatic gravity anomalies over the outer shelf may be due in part to a lateral increase in sediment density (velocity) near the shelf edge. The East Coast magnetic anomaly and the free-air gravity high both coincide over the outer shelf edge on line 1 (Georges Bank) but are offset by 20 km from the ridge on the reflection profile. Because the magnetic-slope-anomaly wavelength is nearly 50 km across, a deep source is likely. In part, the positive free-air gravity anomaly likewise may represent the significant lateral density increase within the sedimentary section to ard the outer edge of the shelf.

33 CFR 143.201 - Existing MODUs exempted from new design requirements.

Code of Federal Regulations, 2010 CFR

2010-07-01

... HOMELAND SECURITY (CONTINUED) OUTER CONTINENTAL SHELF ACTIVITIES DESIGN AND EQUIPMENT Mobile Offshore Drilling Units § 143.201 Existing MODUs exempted from new design requirements. Any mobile offshore drilling...

30 CFR 285.114 - Paperwork Reduction Act statements-information collection.

Code of Federal Regulations, 2010 CFR

2010-07-01

... OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF General... renewable energy applicants, lessees, ROW grant holders, RUE grant holders, Alternate Use RUE grant holders...

Outer Continental Shelf Reform Act of 2010

THOMAS, 111th Congress

Sen. Bingaman, Jeff [D-NM

2010-06-21

Senate - 07/28/2010 Placed on Senate Legislative Calendar under General Orders. Calendar No. 492. (All Actions) Tracker: This bill has the status IntroducedHere are the steps for Status of Legislation:

ENSO-Modulation of Plankton Production in the Northern Gulf of Mexico: A High-Resolution Ocean-Biogeochemical Model Study

NASA Astrophysics Data System (ADS)

Gomez, F. A.; Lee, S. K.; Liu, Y.; Hernandez, F., Jr.; Lamkin, J. T.

2017-12-01

Previous studies have suggested that El Nino-Southern Oscillation (ENSO) plays a role in modulating phytoplankton biomass and the reproductive success of marine species in the Gulf of Mexico (GoM). However, characterizations of ENSO-related ecosystem responses such as plankton production have not been fully addressed for the region. Here we examine ENSO impacts on biogeochemical processes within coastal and open ocean domains in the GoM, using a three dimensional high-resolution ocean-biogeochemical model, forced with historical surface fluxes and river run-off for 1979 - 2014. Enhanced precipitation across southern US during El Nino winter increases freshwater discharge and nutrient load into the GoM mainly via the Mississippi-Atchafalaya River. Those anomalies lead to reduced salinity and greater concentration of dissolved inorganic nitrogen and plankton production in the northern shelf especially during winter. In addition, the frequency of northerly wind anomalies that cool the upper ocean increases during El Nino. The negative surface heat flux anomalies further decrease vertical thermal stratification and thus increase phytoplankton production during early spring in the northern deep GoM.

Biogeochemical and physical controls on the distribution of dissolved organic carbon in the deep Gulf of Mexico and basins of the Caribbean

NASA Astrophysics Data System (ADS)

Margolin, A. R.; Hansell, D. A.

2016-02-01

Over the past two decades, significant advances have been made in understanding dissolved organic carbon (DOC) distributions in the Atlantic and throughout the global ocean. Surprisingly, however, little is known about DOC distributions in the Atlantic's neighboring Gulf of Mexico (GoM) and Caribbean due to few observations, especially in their deep layers. To address the dearth of DOC data in the GoM and Caribbean, samples were collected during multiple cruises spanning the region, allowing comparisons between the deep layers of the basins. Additionally, complementary biogeochemical (oxygen, nutrients) and physical (temperature, salinity) measurements were made to aid in DOC interpretation, which show clear distinctions between the deep waters of the GoM, basins of the Caribbean and Atlantic. The unique characteristics of these deep layers result from exchanges being restricted to narrow passages that separate the basins, limiting the deep water renewal to periodic overflows of relatively dense water, capable of penetrating below the 2000 m sill depths. Furthermore, hydrocarbon seeps (in GoM) and hydrothermal activity (in Caribbean), along with the offshore oil industry have the potential to alter deep DOC concentrations regionally, which are considered here. Samples collected below 250 m show that concentrations decrease with depth, ranging from 40-50 µmol kg-1. Compared to the Atlantic, the GoM and Venezuelan Basin concentrations are lower, while they are similar to the Atlantic in the Yucatan Basin; responsible processes are inferred.

Reanalyses of Gulf of Mexico fisheries data: landings can be misleading in assessments of fisheries and fisheries ecosystems.

PubMed

de Mutsert, Kim; Cowan, James H; Essington, Timothy E; Hilborn, Ray

2008-02-19

We used two high profile articles as cases to demonstrate that use of fishery landings data can lead to faulty interpretations about the condition of fishery ecosystems. One case uses the mean trophic level index and its changes, and the other uses estimates of fishery collapses. In earlier analyses by other authors, marine ecosystems in the Gulf of Mexico (GOM) and U.S. Atlantic Ocean south of Chesapeake Bay were deemed to be severely overfished and the food webs badly deteriorated using these criteria. In our reanalyses, the low mean trophic level index for the GOM actually resulted from large catches of two groups of low trophic level species, menhaden and shrimp, and the mean trophic level was slowly increasing rather than decreasing. Commercial targeting and high landings of shrimps and menhaden, especially in the GOM, drove the index as previously calculated. Reanalyses of fishery collapses incorporating criteria that included targeting, variability in fishing effort, and market forces discovered many false cases of collapse based simply upon a decline of catches to 10% of previous maximum levels. Consequently, we suggest that the low mean trophic level index calculated in the earlier article for the GOM did not reflect the overall condition of the fishery ecosystem, and that the 10% rule for collapse should not be interpreted out of context in the GOM or elsewhere. In both cases, problems lay in the assumption that commercial landings data alone adequately reflect the fish populations and communities.

Trophic Ecology of Atlantic Bluefin Tuna (Thunnusthynnus) Larvae from the Gulf of Mexico and NW Mediterranean Spawning Grounds: A Comparative Stable Isotope Study

PubMed Central

Malca, Estrella; Quintanilla, José María; Muhling, Barbara A.; Alemany, Francisco; Privoznik, Sarah L.; Shiroza, Akihiro; Lamkin, John T.; García, Alberto

2015-01-01

The present study uses stable isotopes of nitrogen and carbon (δ15Nandδ13C) as trophic indicators for Atlantic bluefin tuna larvae (BFT) (6–10 mm standard length) in the highly contrasting environmental conditions of the Gulf of Mexico (GOM) and the Balearic Sea (MED). These regions are differentiated by their temperature regime and relative productivity, with the GOM being significantly warmer and more productive. MED BFT larvae showed the highest δ15N signatures, implying an elevated trophic position above the underlying microzooplankton baseline. Ontogenetic dietary shifts were observed in the BFT larvae from the GOM and MED which indicates early life trophodynamics differences between these spawning habitats. Significant trophic differences between the GOM and MED larvae were observed in relation to δ15N signatures in favour of the MED larvae, which may have important implications in their growth during their early life stages.These low δ15N levels in the zooplankton from the GOM may be an indication of a shifting isotopic baseline in pelagic food webs due to diatrophic inputs by cyanobacteria. Lack of enrichment for δ15N in BFT larvae compared to zooplankton implies an alternative grazing pathway from the traditional food chain of phytoplankton—zooplankton—larval fish. Results provide insight for a comparative characterization of the trophic pathways variability of the two main spawning grounds for BFT larvae. PMID:26225849

Species boundaries of Gulf of Mexico vestimentiferans (Polychaeta, Siboglinidae) inferred from mitochondrial genes

NASA Astrophysics Data System (ADS)

Pia Miglietta, Maria; Hourdez, Stephane; Cowart, Dominique A.; Schaeffer, Stephen W.; Fisher, Charles

2010-11-01

At least six morphospecies of vestimentiferan tubeworms are associated with cold seeps in the Gulf of Mexico (GOM). The physiology and ecology of the two best-studied species from depths above 1000 m in the upper Louisiana slope (Lamellibrachia luymesi and Seepiophila jonesi) are relatively well understood. The biology of one rare species from the upper slope (escarpiid sp. nov.) and three morphospecies found at greater depths in the GOM (Lamellibrachia sp. 1, L. sp. 2, and Escarpia laminata) are not as well understood. Here we address species distributions and boundaries of cold-seep tubeworms using phylogenetic hypotheses based on two mitochondrial genes. Fragments of the mitochondrial large ribosomal subunit rDNA (16S) and cytochrome oxidase subunit I (COI) genes were sequenced for 167 vestimentiferans collected from the GOM and analyzed in the context of other seep vestimentiferans for which sequence data were available. The analysis supported five monophyletic clades of vestimentiferans in the GOM. Intra-clade variation in both genes was very low, and there was no apparent correlation between the within-clade diversity and collection depth or location. Two of the morphospecies of Lamellibrachia from different depths in the GOM could not be distinguished by either mitochondrial gene. Similarly, E. laminata could not be distinguished from other described species of Escarpia from either the west coast of Africa or the eastern Pacific using COI. We suggest that the mitochondrial COI and 16S genes have little utility as barcoding markers for seep vestimentiferan tubeworms.

33 CFR 143.205 - Requirements for U.S. and undocumented MODUs.

Code of Federal Regulations, 2010 CFR

2010-07-01

... SECURITY (CONTINUED) OUTER CONTINENTAL SHELF ACTIVITIES DESIGN AND EQUIPMENT Mobile Offshore Drilling Units § 143.205 Requirements for U.S. and undocumented MODUs. Each mobile offshore drilling unit that is...

76 FR 22699 - Environmental Impacts Statements; Notice of Availability

Federal Register 2010, 2011, 2012, 2013, 2014

2011-04-22

.... 20110126, Draft Supplement, MMS, 00, Gulf of Mexico Outer Continental Shelf Oil and Gas Lease Sales: 2011... Establish and Maintain Spaces--Defensible Fuel Profile Zones (DFPZs), Feather River Ranger District, Plumas...

33 CFR 144.10-1 - Lifesaving equipment.

Code of Federal Regulations, 2014 CFR

2014-07-01

...) OUTER CONTINENTAL SHELF ACTIVITIES LIFESAVING APPLIANCES Unmanned Platforms § 144.10-1 Lifesaving... is no available space to keep them on the platform. [CGD 73-177R, 40 FR 8176, Feb. 26, 1975, as...

33 CFR 144.10-1 - Lifesaving equipment.

Code of Federal Regulations, 2010 CFR

2010-07-01

...) OUTER CONTINENTAL SHELF ACTIVITIES LIFESAVING APPLIANCES Unmanned Platforms § 144.10-1 Lifesaving... is no available space to keep them on the platform. [CGD 73-177R, 40 FR 8176, Feb. 26, 1975, as...

33 CFR 145.05 - Classification of fire extinguishers.

Code of Federal Regulations, 2014 CFR

2014-07-01

... SECURITY (CONTINUED) OUTER CONTINENTAL SHELF ACTIVITIES FIRE-FIGHTING EQUIPMENT § 145.05 Classification of... means so that all portions of the space concerned may be covered. Examples of size graduations for some...

33 CFR 145.05 - Classification of fire extinguishers.

Code of Federal Regulations, 2012 CFR

2012-07-01

... SECURITY (CONTINUED) OUTER CONTINENTAL SHELF ACTIVITIES FIRE-FIGHTING EQUIPMENT § 145.05 Classification of... means so that all portions of the space concerned may be covered. Examples of size graduations for some...

33 CFR 145.05 - Classification of fire extinguishers.

Code of Federal Regulations, 2013 CFR

2013-07-01

... SECURITY (CONTINUED) OUTER CONTINENTAL SHELF ACTIVITIES FIRE-FIGHTING EQUIPMENT § 145.05 Classification of... means so that all portions of the space concerned may be covered. Examples of size graduations for some...

33 CFR 144.10-1 - Lifesaving equipment.

Code of Federal Regulations, 2013 CFR

2013-07-01

...) OUTER CONTINENTAL SHELF ACTIVITIES LIFESAVING APPLIANCES Unmanned Platforms § 144.10-1 Lifesaving... is no available space to keep them on the platform. [CGD 73-177R, 40 FR 8176, Feb. 26, 1975, as...

33 CFR 144.10-1 - Lifesaving equipment.

Code of Federal Regulations, 2012 CFR

2012-07-01

...) OUTER CONTINENTAL SHELF ACTIVITIES LIFESAVING APPLIANCES Unmanned Platforms § 144.10-1 Lifesaving... is no available space to keep them on the platform. [CGD 73-177R, 40 FR 8176, Feb. 26, 1975, as...

33 CFR 144.10-1 - Lifesaving equipment.

Code of Federal Regulations, 2011 CFR

2011-07-01

...) OUTER CONTINENTAL SHELF ACTIVITIES LIFESAVING APPLIANCES Unmanned Platforms § 144.10-1 Lifesaving... is no available space to keep them on the platform. [CGD 73-177R, 40 FR 8176, Feb. 26, 1975, as...

30 CFR 281.2 - Authority.

Code of Federal Regulations, 2011 CFR

2011-07-01

... OFFSHORE LEASING OF MINERALS OTHER THAN OIL, GAS, AND SULPHUR IN THE OUTER CONTINENTAL SHELF General § 281.2 Authority. The Act authorizes the Secretary to grant leases for any mineral other than oil, gas...

30 CFR 285.641 - What must I demonstrate in my GAP?

Code of Federal Regulations, 2010 CFR

2010-07-01

... RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Plans and Information... harm or damage to natural resources; life (including human and wildlife); property; the marine, coastal...

30 CFR 285.1013 - Is an Alternate Use RUE assignable?

Code of Federal Regulations, 2010 CFR

2010-07-01

... RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights of Use and Easement for Energy- and Marine-Related Activities Using Existing OCS Facilities Alternate Use Rue...

78 FR 27427 - Outer Continental Shelf (OCS) Geological and Geophysical Exploration Activities in the Gulf of...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-05-10

... in support of oil and gas exploration and development, including electromagnetic surveys, deep... surveys, electromagnetic surveys, magnetic surveys, gravity surveys, remote sensing surveys, marine...

30 CFR 250.903 - What records must I keep?

Code of Federal Regulations, 2013 CFR

2013-07-01

... OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Platforms and Structures General... steel brackets, deck stiffeners and secondary braces or beams would not generally be considered primary...

30 CFR 250.903 - What records must I keep?

Code of Federal Regulations, 2014 CFR

2014-07-01

... OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Platforms and Structures General... steel brackets, deck stiffeners and secondary braces or beams would not generally be considered primary...

30 CFR 250.903 - What records must I keep?

Code of Federal Regulations, 2012 CFR

2012-07-01

... OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Platforms and Structures General... steel brackets, deck stiffeners and secondary braces or beams would not generally be considered primary...

A Boundary Delineation System for the Bureau of Ocean Energy Management

NASA Astrophysics Data System (ADS)

Vandegraft, Douglas L.

2018-05-01

Federal government mapping of the offshore areas of the United States in support of the development of oil and gas resources began in 1954. The first mapping system utilized a network of rectangular blocks defined by State Plane coordinates which was later revised to utilize the Universal Transverse Mercator grid. Creation of offshore boundaries directed by the Submerged Lands Act and Outer Continental Shelf Lands Act were mathematically determined using early computer programs that performed the required computations, but required many steps. The Bureau of Ocean Energy Management has revised these antiquated methods using GIS technology which provide the required accuracy and produce the mapping products needed for leasing of energy resources, including renewable energy projects, on the outer continental shelf. (Note: this is an updated version of a paper of the same title written and published in 2015).

Extensive investigation of the IGF2/H19 imprinting control region reveals novel OCT4/SOX2 binding site defects associated with specific methylation patterns in Beckwith-Wiedemann syndrome.

PubMed

Abi Habib, Walid; Azzi, Salah; Brioude, Frédéric; Steunou, Virginie; Thibaud, Nathalie; Das Neves, Cristina; Le Jule, Marilyne; Chantot-Bastaraud, Sandra; Keren, Boris; Lyonnet, Stanislas; Michot, Caroline; Rossi, Massimiliano; Pasquier, Laurent; Gicquel, Christine; Rossignol, Sylvie; Le Bouc, Yves; Netchine, Irène

2014-11-01

Isolated gain of methylation (GOM) at the IGF2/H19 imprinting control region 1 (ICR1) accounts for about 10% of patients with BWS. A subset of these patients have genetic defects within ICR1, but the frequency of these defects has not yet been established in a large cohort of BWS patients with isolated ICR1 GOM. Here, we carried out a genetic analysis in a large cohort of 57 BWS patients with isolated ICR1 GOM and analyzed the methylation status of the entire domain. We found a new point mutation in two unrelated families and a 21 bp deletion in another unrelated child, both of which were maternally inherited and affected the OCT4/SOX2 binding site in the A2 repeat of ICR1. Based on data from this and previous studies, we estimate that cis genetic defects account for about 20% of BWS patients with isolated ICR1 GOM. Methylation analysis at eight loci of the IGF2/H19 domain revealed that sites surrounding OCT4/SOX2 binding site mutations were fully methylated and methylation indexes declined as a function of distance from these sites. This was not the case in BWS patients without genetic defects identified. Thus, GOM does not spread uniformly across the IGF2/H19 domain, suggesting that OCT4/SOX2 protects against methylation at local sites. These findings add new insights to the mechanism of the regulation of the ICR1 domain. Our data show that mutations and deletions within ICR1 are relatively common. Systematic identification is therefore necessary to establish appropriate genetic counseling for BWS patients with isolated ICR1 GOM. © The Author 2014. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

The Influences of Riverine Dissolved Organic Matter in the Gulf of Maine

NASA Astrophysics Data System (ADS)

Aiken, G.; Cao, X.; Mao, J.; Spencer, R. G.; Balch, W. M.; Huntington, T. G.

2014-12-01

Dissolved organic matter (DOM) exported from the Gulf of St. Lawrence and by rivers in Maine, Nova Scotia, and New Brunswick is being studied to quantify and characterize optical proxies in the receiving waters of the Gulf of Maine (GoM). Measurements of DOC concentrations, absorption coefficients (254nm, 350 nm and 412 nm), specific ultraviolet absorbance (SUVA254), spectral slope, and fluorescence, and DOC fractionation and isotopic analyses were used to determine the amount and nature of DOM from major inflowing rivers, marine waters, and the GoM. In addition, lignin phenols, 14C-age, 13C-NMR and FTICR-MS analyses were performed on the hydrophobic (HPOA) and transphilic organic acid fractions of the DOM isolated using XAD resins for a smaller subset of samples from the Penobscot River, Penobscot Bay, GoM waters in the Eastern Maine Coastal Current (EMCC), a sample from the eastern portion of the GoM (Scotian Shelf waters), and the Pacific Ocean. These samples provide detailed DOM compositional data in support of the more easily collected concentration and optical data obtained from discrete samples, optical data obtained by in situ glider, and remotely sensed satellite observations. Optical measurements, 13C-NMR, and lignin phenol analyses showed that DOM associated with inflowing rivers to the GoM is rich in aromatic compounds resulting in a large flux of terrestrially derived chromophoric DOM (CDOM). As a result, GoM DOM is more aromatic and younger than open ocean samples collected from the Sargasso Sea and from the Pacific Ocean near Hawaii. This observation is consistent with isotopic data that indicated δ 13C values for the HPOA fractions from the Gulf samples (δ 13C= -27‰ and -25‰) were considerably depleted in comparison to the whole DOM sample (δ 13C = -19‰; which also includes algal-produced DOM) and are more similar to those from the terrestrial sources. Samples from the EMCC were the most heavily influenced by terrestrial sources. While NMR analyses indicated decreases in the aromaticity of the HPOA fractions moving from the rivers to the open ocean, NMR signals associated with carboxyl-rich alicyclic organic matter were observed for all samples. Results from this study are being used to develop relationships for predicting DOC concentration in the GoM from remotely sensed, satellite optical data.

Distinctive styles of salt deformation formed by radial, convergent gliding into the sharp corners of the northeastern and northwestern Gulf of Mexico

NASA Astrophysics Data System (ADS)

Bugti, M. N.; Mann, P.

2016-12-01

Previous workers have described the effects both downslope motion of salt and shale along straight margins and the more complex three-dimensional cases of downslope salt motion and deformation: 1) radial, divergent gliding off of coastal salients accompanied by strike-parallel extension increasing downslope; and 2) radial, convergent gliding into coastal reentrants or "corners" accompanied by strike-parallel contraction and differential loading increasing downslope. The northwestern Gulf of Mexico (GOM) forms a sharp, right-angle corner defined northeastern shelf of Mexico and South Texas and the shelf of the northern GOM; in a similar way the northwestern GOM forms a sharp, right-angle corner defined by the northern shelf of the GOM and the shelf of west Florida. Despite their physical separation by over 700 km, both the NW and NE GOM corners exhibit similar salt structures not observed in adjacent areas outside of the two corners. These corner-related features include: 1) detached salt stocks with positive surface expression; we interpret the detached salt stocks as reflecting a higher degree of radial convergent gliding and compression from three sides into the bend areas; 2) slightly elongate, surficial, diapir shapes with positive bathymetric expression and ranging in diameter from 2 to 22 km and localized fold axes with the long diapiric axes and fold axes aligned parallel to the bisector of the bend; these features are also attributed to radial convergent gliding into the bend areas; 3) zones of deformation at depth that occupy the corner areas: the northwestern GOM corresponds to the Port Isabel passive-margin fold and thrust belt and the northeastern GOM corresponds to the Mississippi Canyon fold and thrust belt; while these are older convergent features we propose that they are being reactivated by the corner-centric, gravity-driven process of radial, convergent gliding; and 4) salt welds in both corner areas record more intensive and complete salt extrusion of salt; outside the corner areas salt canopies and the lack of salt welds indicates a less convergent environment for salt. These two proposed areas of radial convergent gliding are compared to other examples of radial, convergent gliding described by previous workers in the Gulf of Lions and Santos basins.

Alternative futures of dissolved inorganic nitrogen export from the Mississippi River Basin: influence of crop management, atmospheric deposition, and population growth

EPA Science Inventory

Nitrogen (N) export from the Mississippi River Basin contributes to seasonal hypoxia in the Gulf of Mexico (GOM). We explored monthly dissolved inorganic N (DIN) export to the GOM for a historical year (2002) and two future scenarios (year 2022) by linking macroeonomic energy, ag...

Anticipatory Eye Movements in Interleaving Templates of Human Behavior

NASA Technical Reports Server (NTRS)

Matessa, Michael

2004-01-01

Performance modeling has been made easier by architectures which package psychological theory for reuse at useful levels of abstraction. CPM-GOMS uses templates of behavior to package at a task level (e.g., mouse move-click, typing) predictions of lower-level cognitive, perceptual, and motor resource use. CPM-GOMS also has a theory for interleaving resource use between templates. One example of interleaving is anticipatory eye movements. This paper describes the use of ACT-Stitch, a framework for translating CPM-GOMS templates and interleaving theory into ACT-R, to model anticipatory eye movements in skilled behavior. The anticipatory eye movements explain performance in a well-practiced perceptual/motor task, and the interleaving theory is supported with results from an eye-tracking experiment.

Strain measurements and the potential for a great subduction earthquake off the coast of washington.

PubMed

Savage, J C; Lisowski, M

1991-04-05

Geodetic measurements of deformation in northwestern Washington indicate that strain is accumulating at a rate close to that predicted by a model of the Cascadia subduction zone in which the plate interface underlying the continental slope and outer continental shelf is currently locked but the remainder of the interface slips continuously. Presumably this locked segment will eventually rupture in a great thrust earthquake with a down-dip extent greater than 100 kilometers.

Observed Oceanic Response over the Upper Continental Slope and Outer Shelf during Hurricane Ivan

DTIC Science & Technology

2007-09-01

the slope and rise. In addition, they were presumed to be along-shelf and cross-shelf components of group veloci- generated by pulsations of the Loop ...hits. Fortunately, all of exchange of mass, momentum, heat , and water proper- the SEED moorings survived this powerful storm and ties across the shelf...15. SUBJECT TERMS SEED, continental shelf, Doppler, waves 16. SECURITY CLASSIFICATION OF: 17. LIMITATION OF 18. NUMBER 19a. NAME OF RESPONSIBLE

Inorganic geochemistry of surface sediments of the Ebro shelf and slope, northwestern Mediterranean

USGS Publications Warehouse

Gardner, J.V.; Dean, W.E.; Alonso, B.

1990-01-01

Distributions of major, minor, and trace elements in surface sediment of the continental shelf and upper slope of the northeastern Spanish continental margin reflect the influences of discharge from the Ebro River and changes in eustatic sea levels. Multivariate factor analysis of sediment geochemistry was used to identify five groupings of samples (factors) on the shelf and slope. The first factor is an aluminosilicate factor that represents detrital clastic material. The second factor is a highly variable amount of excess SiO2 and probably represents a quartz residuum originating from winnowing of relict detrital sediments. A carbonate factor (Factor 3) has no positive correlation with other geochemical parameters but is associated with the sand-size fraction. The carbonate in these sediments consists of a mixture of biogenic calcite and angular to subangular detrital grains. Organic carbon is associated with the aluminosilicate factor (Factor 1) but also factors out by itself (Factor 4); this suggests that there may be two sources of organic matter, terrestrial and marine. The fifth factor comprises upper slope sediments that contain high concentrations of manganese. The most likely explanation for these high manganese concentrations is precipitation of Mn oxyhydroxides at the interface between Mn-rich, oxygen-deficient, intermediate waters and oxygenated surface waters. During eustatic low sea levels of the glacial Pleistocene, the Ebro Delta built across the outer continental shelf and deposited sediment with fairly high contents of organic carbon and continental components. The period of marine transgression from eustatic low (glacial) to eustatic high (interglacial) sea levels was characterized by erosion of the outer shelf delta and surficial shelf sediments and the transport of sediment across the slope within numerous canyons. Once eustatic high sea level was reached, delta progradation resumed on the inner shelf. Today, coarse-grained sediment (silt and sand) is transported to the continental shelf by Ebro River and is distributed along the inner shelf by currents generated by dominant northeasterly winds. Clay-size material is deposited on the mid- and outer-shelf. However, erosion and delta progradation during the last glacial period, and fine-grained Holocene sedimentation, have probably produced a distribution of sediment on a diachronous surface. ?? 1990.

30 CFR 285.623-285.625 - [Reserved

Code of Federal Regulations, 2010 CFR

2010-07-01

... ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Plans and Information Requirements Construction and Operations Plan for Commercial Leases §§ 285.623-285.625 [Reserved] Contents of the Construction and Operations Plan ...

Outer Continental Shelf Permit Processing Coordination Act

THOMAS, 112th Congress

Sen. Begich, Mark [D-AK

2011-04-14

Senate - 05/17/2011 Committee on Energy and Natural Resources. Hearings held. Hearings printed: S.Hrg. 112-51. (All Actions) Tracker: This bill has the status IntroducedHere are the steps for Status of Legislation:

30 CFR 285.1015 - How do I relinquish an Alternate Use RUE?

Code of Federal Regulations, 2010 CFR

2010-07-01

... OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights of Use and Easement for Energy- and Marine-Related Activities Using Existing OCS Facilities Alternate Use...

30 CFR 285.1011 - What payments are required for an Alternate Use RUE?

Code of Federal Regulations, 2010 CFR

2010-07-01

... INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights of Use and Easement for Energy- and Marine-Related Activities Using Existing OCS Facilities...

30 CFR 285.1005 - How do I request an Alternate Use RUE?

Code of Federal Regulations, 2010 CFR

2010-07-01

... RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights of Use and Easement for Energy- and Marine-Related Activities Using Existing OCS Facilities Requesting An Alternate...

Outer Continental Shelf Reform Act of 2011

THOMAS, 112th Congress

Sen. Bingaman, Jeff [D-NM

2011-05-09

Senate - 05/17/2011 Committee on Energy and Natural Resources. Hearings held. Hearings printed: S.Hrg. 112-51. (All Actions) Tracker: This bill has the status IntroducedHere are the steps for Status of Legislation:

Bowhead whale, balaena mysticetus bibliography. Final report

DOE Office of Scientific and Technical Information (OSTI.GOV)

Setzler-Hamilton, E.M.; Oliver, G.W.

1987-01-01

This report categorizes the research literature on bowhead whales according to major research topics, issues of concern to Outer Continental Shelf oil and gas development, and geographic areas. The report has an extensive cross index.

30 CFR 250.448 - What are the BOP pressure tests requirements?

Code of Federal Regulations, 2012 CFR

2012-07-01

... OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Blowout Preventer (bop) System Requirements § 250.448 What are the BOP...

30 CFR 250.444 - What are the choke manifold requirements?

Code of Federal Regulations, 2010 CFR

2010-07-01

... OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations... abrasiveness of drilling fluids and well fluids that you may encounter. (b) Choke manifold components must have...

30 CFR 250.448 - What are the BOP pressure tests requirements?

Code of Federal Regulations, 2013 CFR

2013-07-01

... OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Blowout Preventer (bop) System Requirements § 250.448 What are the BOP...

30 CFR 250.448 - What are the BOP pressure tests requirements?

Code of Federal Regulations, 2014 CFR

2014-07-01

... OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Blowout Preventer (bop) System Requirements § 250.448 What are the BOP...

30 CFR 285.712 - What are the CVA's or project engineer's reporting requirements?

Code of Federal Regulations, 2010 CFR

2010-07-01

... THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Facility Design, Fabrication, and Installation Certified Verification Agent § 285.712 What are the...

30 CFR 285.709 - When conducting onsite fabrication inspections, what must the CVA or project engineer verify?

Code of Federal Regulations, 2010 CFR

2010-07-01

... MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Facility Design, Fabrication, and Installation Certified...

30 CFR 250.1750 - When may I decommission a pipeline in place?

Code of Federal Regulations, 2010 CFR

2010-07-01

... OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Decommissioning Activities... (obstruction) to navigation and commercial fishing operations, unduly interfere with other uses of the OCS, or...

30 CFR 250.1300 - What is the purpose of this subpart?

Code of Federal Regulations, 2011 CFR

2011-07-01

..., DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF... competitive reservoir and unitization situations. The purpose of joint development and unitization is to: (a...

78 FR 5836 - Adjustment of Service Fees for Outer Continental Shelf Activities

Federal Register 2010, 2011, 2012, 2013, 2014

2013-01-28

... Energy Management, Economics Division, 381 Elden Street, HM 3310, Herndon, Virginia 20170. FOR FURTHER... is calculated as the percentage difference between the measure of the level of prices for a...

Toxic Alexandrium blooms in the western Gulf of Maine: The plume advection hypothesis revisited

USGS Publications Warehouse

Anderson, D.M.; Keafer, B.A.; Geyer, W.R.; Signell, R.P.; Loder, T.C.

2005-01-01

The plume advection hypothesis links blooms of the toxic dinoflagellate Alexandrium fundyense in the western Gulf of Maine (GOM) to a buoyant plume derived from river outflows. This hypothesis was examined with cruise and moored-instrument observations in 1993 when levels of paralytic shellfish poisoning (PSP) toxins were high, and in 1994 when toxicity was low. A coupled physical-biological model simulated hydrography and A. fundyense distributions. Initial A. fundyense populations were restricted to low-salinity nearshore waters near Casco Bay, but also occurred in higher salinity waters along the plume boundary. This suggests two sources of cells - those from shallow-water cyst populations and those transported to shore from offshore blooms in the eastern segment of the Maine coastal current (EMCC). Observations confirm the role of the plume in A. fundyense transport and growth. Downwelling-favorable winds in 1993 transported the plume and its cells rapidly alongshore, enhancing toxicity and propagating PSP to the south. In 1994, sustained upwelling moved the plume offshore, resulting in low toxicity in intertidal shellfish. A. fundyense blooms were likely nutrient limited, leading to low growth rates and moderate cell abundances. These observations and mechanisms were reproduced by coupled physical-biological model simulations. The plume advection hypothesis provides a viable explanation for outbreaks of PSP in the western GOM, but should be refined to include two sources for cells that populate the plume and two major pathways for transport: one within the low-salinity plume and another where A. fundyense cells originating in the EMCC are transported along the outer boundary of the plume front with the western segment of the Maine coastal current.

Movement and effects of spilled oil over the outer continental shelf; inadequacy of existent data for the Baltimore Canyon Trough area

USGS Publications Warehouse

Knebel, Harley J.

1974-01-01

A deductive approach to the problem of determining the movement and effects of spilled oil over the Outer Continental Shelf requires that the potential paths of oil be determined first, in order that critical subareas may be defined for later studies. The paths of spilled oil, in turn, depend primarily on the temporal and spatial variability of four factors: the thermohaline structure of the waters, the circulation of the water, the winds, and the distribution of suspended matter. A review of the existent data concerning these factors for the Baltimore Canyon Trough area (a relatively well studied segment of the Continental Shelf) reveals that the movement and dispersal of potential oil spills cannot be reliably predicted. Variations in the thermohaline structure of waters and in the distribution of suspended matter are adequately known; the uncertainty is due to insufficient wind and storm statistics and to the lack of quantitative understanding of the relationship between the nontidal drift and its basic driving mechanisms. Similar inadequacies should be anticipated for other potentially leasable areas of the shelf because an understanding of the movement of spilled oil has not been the underlying aim of most previous studies.

Sediment color and reflectance record from Ocean Drilling Program Hole 625B, Gulf of Mexico (marine isotope stage 5 interval)

USGS Publications Warehouse

Dowsett, Harry J.

1999-01-01

Analysis of climate indicators from the North Atlantic, California Margin, and ice cores from Greenland suggest millennial scale climate variability is a component of earth's climate system during the last interglacial period (marine oxygen isotope stage 5). The USGS is involved in a survey of high resolution marine records covering the last interglacial period (MIS 5) to further document the variability of climate and assess the rate at which climate can change during warm intervals. The Gulf of Mexico (GOM) is an attractive area for analysis of climate variability and rapid change. Changes in the Mississippi River Basin presumably are translated to the GOM via the river and its effect on sediment distribution and type. Likewise, the summer monsoon in the southwestern US is driven by strong southerly winds. These winds may produce upwelling in the GOM which will be recorded in the sedimentary record. Several areas of high accumulation rate have been identified in the GOM. Ocean Drilling Program (ODP) Site 625 appears to meet the criteria of having a well preserved carbonate record and accumulation rate capable of discerning millennial scale changes.

30 CFR 285.626 - What must I include in my COP?

Code of Federal Regulations, 2010 CFR

2010-07-01

... ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Plans and Information Requirements Contents of the Construction and Operations Plan § 285.626 What must I include in my COP? (a) You...

30 CFR 285.622 - How do I submit my COP?

Code of Federal Regulations, 2010 CFR

2010-07-01

... ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Plans and Information Requirements Construction and Operations Plan for Commercial Leases § 285.622 How do I submit my COP? (a) You must submit...

30 CFR 285.621 - What must I demonstrate in my COP?

Code of Federal Regulations, 2010 CFR

2010-07-01

... RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Plans and Information Requirements Construction and Operations Plan for Commercial Leases § 285.621 What must I demonstrate in my COP...

Outer Continental Shelf Transboundary Hydrocarbon Agreements Authorization Act

THOMAS, 113th Congress

Rep. Duncan, Jeff [R-SC-3

2013-04-18

Senate - 10/01/2013 Committee on Energy and Natural Resources. Hearings held. Hearings printed: S.Hrg. 113-104. (All Actions) Tracker: This bill has the status Passed HouseHere are the steps for Status of Legislation:

30 CFR 285.210 - How does MMS initiate the competitive leasing process?

Code of Federal Regulations, 2011 CFR

2011-07-01

... ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Competitive Lease Process § 285.210 How... renewable energy. ...

30 CFR 285.211 - What is the process for competitive issuance of leases?

Code of Federal Regulations, 2010 CFR

2010-07-01

... OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Competitive Lease Process § 285.211 What is the process for competitive...

30 CFR 285.224 - What happens if MMS accepts my bid?

Code of Federal Regulations, 2010 CFR

2010-07-01

... RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Competitive Lease Award Process § 285.224 What happens if MMS accepts my bid? If we...

30 CFR 281.2 - Authority.

Code of Federal Regulations, 2010 CFR

2010-07-01

... OIL, GAS, AND SULPHUR IN THE OUTER CONTINENTAL SHELF General § 281.2 Authority. The Act authorizes the Secretary to grant leases for any mineral other than oil, gas, and sulphur in any area of the OCS to the...

Technical management techniques for identification and control of industrial safety and pollution hazards

NASA Technical Reports Server (NTRS)

Campbell, R.; Dyer, M. K.; Hoard, E. G.; Little, D. G.; Taylor, A. C.

1972-01-01

Constructive recommendations are suggested for pollution problems from offshore energy resources industries on outer continental shelf. Technical management techniques for pollution identification and control offer possible applications to space engineering and management.

30 CFR 550.200 - Definitions.

Code of Federal Regulations, 2012 CFR

2012-07-01

... OPERATIONS IN THE OUTER CONTINENTAL SHELF Plans and Information General Information § 550.200 Definitions... of Safety and Environmental Enforcement. CID means Conservation Information Document. CZMA means Coastal Zone Management Act. DOCD means Development Operations Coordination Document. DPP means...

30 CFR 285.1012 - What financial assurance is required for an Alternate Use RUE?

Code of Federal Regulations, 2010 CFR

2010-07-01

... THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights of Use and Easement for Energy- and Marine-Related Activities Using Existing OCS Facilities...

30 CFR 285.1004 - What must I do before I request an Alternate Use RUE?

Code of Federal Regulations, 2010 CFR

2010-07-01

... INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights of Use and Easement for Energy- and Marine-Related Activities Using Existing OCS Facilities...

30 CFR 285.1019 - What are the decommissioning requirements for an Alternate Use RUE?

Code of Federal Regulations, 2010 CFR

2010-07-01

..., DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights of Use and Easement for Energy- and Marine-Related Activities Using Existing OCS...

30 CFR 285.1010 - How long may I conduct activities under an Alternate Use RUE?

Code of Federal Regulations, 2010 CFR

2010-07-01

... THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights of Use and Easement for Energy- and Marine-Related Activities Using Existing OCS Facilities...

30 CFR 285.822 - What must I do when MMS conducts an inspection?

Code of Federal Regulations, 2010 CFR

2010-07-01

... OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF... (including your project easement) or grant; and (2) Make the following available for MMS to inspect: (i) The...

30 CFR 250.426 - What are the recordkeeping requirements for casing and liner pressure tests?

Code of Federal Regulations, 2011 CFR

2011-07-01

... MANAGEMENT, REGULATION, AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Casing and Cementing Requirements...

30 CFR 250.448 - What are the BOP pressure tests requirements?

Code of Federal Regulations, 2011 CFR

2011-07-01

... ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Blowout Preventer (bop) System Requirements § 250.448 What are the...

30 CFR 250.423 - What are the requirements for pressure testing casing?

Code of Federal Regulations, 2010 CFR

2010-07-01

... OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations... drilling or other down-hole operations until you obtain a satisfactory pressure test. If the pressure...

30 CFR 250.412 - What requirements must the location plat meet?

Code of Federal Regulations, 2011 CFR

2011-07-01

... ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Applying for A Permit to Drill § 250.412 What requirements must...

30 CFR 250.412 - What requirements must the location plat meet?

Code of Federal Regulations, 2012 CFR

2012-07-01

... OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Applying for A Permit to Drill § 250.412 What requirements must the location...

30 CFR 250.412 - What requirements must the location plat meet?

Code of Federal Regulations, 2013 CFR

2013-07-01

... OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Applying for A Permit to Drill § 250.412 What requirements must the location...

30 CFR 250.440 - What are the general requirements for BOP systems and system components?

Code of Federal Regulations, 2011 CFR

2011-07-01

..., REGULATION, AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Blowout Preventer (bop) System Requirements...

30 CFR 250.460 - What are the requirements for conducting a well test?

Code of Federal Regulations, 2011 CFR

2011-07-01

... ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Other Drilling Requirements § 250.460 What are the requirements...

30 CFR 250.412 - What requirements must the location plat meet?

Code of Federal Regulations, 2014 CFR

2014-07-01

... OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Applying for A Permit to Drill § 250.412 What requirements must the location...

30 CFR 285.703 - What reports must I submit for project modifications and repairs?

Code of Federal Regulations, 2010 CFR

2010-07-01

... THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Facility Design, Fabrication, and Installation Reports § 285.703 What reports must I submit for...

30 CFR 285.814 - [Reserved

Code of Federal Regulations, 2010 CFR

2010-07-01

... Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Environmental and Safety Management, Inspections, and Facility Assessments for Activities Conducted Under SAPs, COPs and GAPs Maintenance and...

30 CFR 291.110 - Who may MMS require to produce information?

Code of Federal Regulations, 2010 CFR

2010-07-01

... OPEN AND NONDISCRIMINATORY ACCESS TO OIL AND GAS PIPELINES UNDER THE OUTER CONTINENTAL SHELF LANDS ACT... make a decision on whether open access or nondiscriminatory access was denied. (b) If you are a party...

30 CFR 250.1300 - What is the purpose of this subpart?

Code of Federal Regulations, 2010 CFR

2010-07-01

... AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Unitization § 250.1300 What is the... you are an OCS lessee, use the regulations in this subpart for both competitive reservoir and...

77 FR 27480 - Outer Continental Shelf Scientific Committee; Announcement of Plenary Session

Federal Register 2010, 2011, 2012, 2013, 2014

2012-05-10

... current issues. On Wednesday, May 23, the Committee will meet in discipline breakout groups (i.e., biology/ecology, physical sciences, and social sciences) to review the specific research plans of BOEM's regional...

30 CFR 285.522-285.524 - [Reserved

Code of Federal Regulations, 2010 CFR

2010-07-01

... ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Payments and Financial Assurance Requirements Financial Assurance for Limited Leases, Row Grants, and Rue Grants §§ 285.522-285.524 [Reserved] Requirements for Financial Assurance Instruments ...

Miocene stratigraphy and structure of Sabine Pass, West Cameron, and East Cameron outer continental shelf areas, Louisiana

DOE Office of Scientific and Technical Information (OSTI.GOV)

Yang, S.Y.; Watkins, J.S.

Mapping of Miocene stratigraphy and structure of the Sabine Pass, West Cameron, and East Cameron areas of the western Louisiana outer continental shelf - based on over 1300 mi of seismic data on a 4-mi grid, paleotops from 60 wells, and logs from 35 wells - resulted in time-structure and isochron maps at six intervals from the upper Pliocene to lower Miocene. The most pronounced structural features are the fault systems, which trend east-northeast to east along the Miocene stratigraphic trend. Isolated normal faults with small displacements characterize the inner inner shelf, whereas interconnected faults with greater displacements characterize themore » outer inner shelf. The inner inner shelf faults exhibit little growth, but expansion across the interconnected outer inner shelf fault ranges up to 1 sec two-way traveltime. The interconnected faults belong to two structurally independent fault families. The innermost shelf faults appear to root in the sediment column. A third set of faults located in the Sabine Pass area trends north-south. This fault set is thought to be related to basement movement and/or basement structure. Very little salt is evident in the area. A single diapir is located in West Cameron Block 110 and vicinity. There is little evidence of deep salt. Overall sediment thickness probably exceeds 20,000 ft, with the middle Miocene accounting for 8000 ft.« less

Impacts of Outer Continental Shelf (OCS) development on recreation and tourism. Volume 3. Detailed methodology

DOE Office of Scientific and Technical Information (OSTI.GOV)

Not Available

The final report for the project is presented in five volumes. This volume, Detailed Methodology Review, presents a discussion of the methods considered and used to estimate the impacts of Outer Continental Shelf (OCS) oil and gas development on coastal recreation in California. The purpose is to provide the Minerals Management Service with data and methods to improve their ability to analyze the socio-economic impacts of OCS development. Chapter II provides a review of previous attempts to evaluate the effects of OCS development and of oil spills on coastal recreation. The review also discusses the strengths and weaknesses of differentmore » approaches and presents the rationale for the methodology selection made. Chapter III presents a detailed discussion of the methods actually used in the study. The volume contains the bibliography for the entire study.« less

Impacts of Outer Continental Shelf (OCS) development on recreation and tourism. Volume 1. Executive summary

DOE Office of Scientific and Technical Information (OSTI.GOV)

Not Available

The study was intended to provide the Mineral Management Service (MMS) with an analytical tool to evaluate possible economic impacts from Outer Continental Shelf (OCS) development. In particular, the study was designed to provide MMS staff who work on lease sale Energy Impact Statements with an objective technique for estimating the impacts to coastal communities from events that might occur as a result of lease sales: oil spills, onshore construction, and construction of platforms offshore. The project had several specific objectives: (1) provide profiles of 1982 socio-economic conditions in coastal communities, including an analysis of the relative importance of themore » tourist industry in each coastal county; (2) develop a methodology for determining the effects of OCS development on coastal recreation; and recommend mitigation measure that may reduce the negative effect of OCS development on coastal recreation using gravity and economic effects models.« less

Large sand waves on the Atlantic Outer Continental Shelf around Wilmington Canyon, off Eastern United States

USGS Publications Warehouse

Knebel, H.J.; Folger, D.W.

1976-01-01

New seismic-reflection data show that large sand waves near the head of Wilmington Canyon on the Atlantic Outer Continental Shelf have a spacing of 100-650 m and a relief of 2-9 m. The bedforms trend northwest and are asymmetrical, the steeper slopes being toward the south or west. Vibracore sediments indicate that the waves apparently have formed on a substrate of relict nearshore sediments. Although the age of the original bedforms is unknown, the asymmetry is consistent with the dominant westerly to southerly drift in this area which has been determined by other methods; the asymmetry, therefore, is probably modern. Observations in the sand-wave area from a submersible during August 1975, revealed weak bottom currents, sediment bioturbation, unrippled microtopography, and lack of scour. Thus, the asymmetry may be maintained by periodic water motion, possibly associated with storms or perhaps with flow in the canyon head. ?? 1976.

Applicability of NASA contract quality management and failure mode effect analysis procedures to the USGS Outer Continental Shelf oil and gas lease management program

NASA Technical Reports Server (NTRS)

Dyer, M. K.; Little, D. G.; Hoard, E. G.; Taylor, A. C.; Campbell, R.

1972-01-01

An approach that might be used for determining the applicability of NASA management techniques to benefit almost any type of down-to-earth enterprise is presented. A study was made to determine the following: (1) the practicality of adopting NASA contractual quality management techniques to the U.S. Geological Survey Outer Continental Shelf lease management function; (2) the applicability of failure mode effects analysis to the drilling, production, and delivery systems in use offshore; (3) the impact on industrial offshore operations and onshore management operations required to apply recommended NASA techniques; and (4) the probable changes required in laws or regulations in order to implement recommendations. Several management activities that have been applied to space programs are identified, and their institution for improved management of offshore and onshore oil and gas operations is recommended.

Diversity and Distribution Patterns of Cetaceans in the Subtropical Southwestern Atlantic Outer Continental Shelf and Slope

PubMed Central

Di Tullio, Juliana Couto; Gandra, Tiago B. R.; Zerbini, Alexandre N.; Secchi, Eduardo R.

2016-01-01

Temporal and spatial patterns of cetacean diversity and distribution were investigated through eight ship-based surveys carried out during spring and autumn between 2009 and 2014 on the outer continental shelf (~150m) and slope (1500m) off southeastern and southern Brazil (~23°S to ~34°S). The survey area was divided into southeast and south areas according to their oceanographic characteristics. Twenty-one species were observed in 503 sightings. The overall number of species was similar between the two areas, though it was higher in the spring in the south area. Five species were dominant and diversity varied more seasonally than spatially. ANOVA and kernel analyses showed that overall cetacean densities were higher in spring compared to autumn. Physeter macrocephalus, the most frequent species, concentrated throughout the south area at depths over 1000m in both seasons. Despite the overlapped occurrence at a broader scale, small delphinids presented latitudinal and in-offshore gradients as well as seasonal variation in distribution patterns, which could indicate habitat partitioning between some species. Delphinus delphis was only recorded in the south and its density decreased in areas where the presence of Stenella frontalis increased, mainly beyond the 250m isobath. Densities of S. longirostris and S. attenuata increased in lower latitudes and beyond the shelf break. The large delphinids Tursiops truncatus and Globicephala melas formed mixed groups in many occasions and were observed along the study area around depths of 500m. Grampus griseus was twice as frequent in the south area and densities increased in waters deeper than 600m. As expected, densities of both small and large migratory whales were higher during spring, over the continental slope, in the southeast area. The results presented here provided strong evidence on the importance of the outer continental shelf and slope to a diverse community of cetaceans occurring in the subtropical Southwestern Atlantic. PMID:27243455

Diversity and Distribution Patterns of Cetaceans in the Subtropical Southwestern Atlantic Outer Continental Shelf and Slope.

PubMed

Di Tullio, Juliana Couto; Gandra, Tiago B R; Zerbini, Alexandre N; Secchi, Eduardo R

2016-01-01

Temporal and spatial patterns of cetacean diversity and distribution were investigated through eight ship-based surveys carried out during spring and autumn between 2009 and 2014 on the outer continental shelf (~150m) and slope (1500m) off southeastern and southern Brazil (~23°S to ~34°S). The survey area was divided into southeast and south areas according to their oceanographic characteristics. Twenty-one species were observed in 503 sightings. The overall number of species was similar between the two areas, though it was higher in the spring in the south area. Five species were dominant and diversity varied more seasonally than spatially. ANOVA and kernel analyses showed that overall cetacean densities were higher in spring compared to autumn. Physeter macrocephalus, the most frequent species, concentrated throughout the south area at depths over 1000m in both seasons. Despite the overlapped occurrence at a broader scale, small delphinids presented latitudinal and in-offshore gradients as well as seasonal variation in distribution patterns, which could indicate habitat partitioning between some species. Delphinus delphis was only recorded in the south and its density decreased in areas where the presence of Stenella frontalis increased, mainly beyond the 250m isobath. Densities of S. longirostris and S. attenuata increased in lower latitudes and beyond the shelf break. The large delphinids Tursiops truncatus and Globicephala melas formed mixed groups in many occasions and were observed along the study area around depths of 500m. Grampus griseus was twice as frequent in the south area and densities increased in waters deeper than 600m. As expected, densities of both small and large migratory whales were higher during spring, over the continental slope, in the southeast area. The results presented here provided strong evidence on the importance of the outer continental shelf and slope to a diverse community of cetaceans occurring in the subtropical Southwestern Atlantic.

Competition and performance in OCS oil and gas lease sales and lease development, 1954-1969

USGS Publications Warehouse

Mead, Walter J.; Sorensen, Philip Edward

1980-01-01

The oil and gas resources of the Outer Continental Shelf represent one of America's largest publicly-owned assets. Through 1978, OCS oil and gas leases had yielded \\$40.5 billion in gross production value and produced over \\$28.3 billion in direct revenue to the federal government.Policies and procedures for managing the oil and gas resources of the OCS were established by Congress in the Outer Continental Shelf Lands Act of 1953. The Department of Interior was given the central responsibility for carrying out this management role in the 1953 Act; this responsibility has been re-established in the 1978 Amendments to the OCS Lands Act. As stated in the 1978 legislation, the goals of OCS management are to:...preserve, protect and develop oil and natural gas resources in a manner which is consistent with the need (A) to make such resources available to meet the Nation's energy needs as rapidly as possible... (C) to insure the public a fair and equitable return on the resources of the Outer Continental Shelf, and (D) to preserve and maintain free enterprise competition.As part of its continuing effort to monitor the effectiveness of federal policies relating to OCS oil and gas resources, the Conservation Division of U.S. Geological Survey, Department of Interior, has sponsored the research which is the basis for the present report. The objectives of the research have been to determine the extent to which the historical policies of OCS management have resulted in achievement of the goals set forth by Congress in the section quoted above.

Using Apex To Construct CPM-GOMS Models

NASA Technical Reports Server (NTRS)

John, Bonnie; Vera, Alonso; Matessa, Michael; Freed, Michael; Remington, Roger

2006-01-01

process for automatically generating computational models of human/computer interactions as well as graphical and textual representations of the models has been built on the conceptual foundation of a method known in the art as CPM-GOMS. This method is so named because it combines (1) the task decomposition of analysis according to an underlying method known in the art as the goals, operators, methods, and selection (GOMS) method with (2) a model of human resource usage at the level of cognitive, perceptual, and motor (CPM) operations. CPM-GOMS models have made accurate predictions about behaviors of skilled computer users in routine tasks, but heretofore, such models have been generated in a tedious, error-prone manual process. In the present process, CPM-GOMS models are generated automatically from a hierarchical task decomposition expressed by use of a computer program, known as Apex, designed previously to be used to model human behavior in complex, dynamic tasks. An inherent capability of Apex for scheduling of resources automates the difficult task of interleaving the cognitive, perceptual, and motor resources that underlie common task operators (e.g., move and click mouse). The user interface of Apex automatically generates Program Evaluation Review Technique (PERT) charts, which enable modelers to visualize the complex parallel behavior represented by a model. Because interleaving and the generation of displays to aid visualization are automated, it is now feasible to construct arbitrarily long sequences of behaviors. The process was tested by using Apex to create a CPM-GOMS model of a relatively simple human/computer-interaction task and comparing the time predictions of the model and measurements of the times taken by human users in performing the various steps of the task. The task was to withdraw $80 in cash from an automated teller machine (ATM). For the test, a Visual Basic mockup of an ATM was created, with a provision for input from (and measurement of the performance of) the user via a mouse. The times predicted by the automatically generated model turned out to approximate the measured times fairly well (see figure). While these results are promising, there is need for further development of the process. Moreover, it will also be necessary to test other, more complex models: The actions required of the user in the ATM task are too sequential to involve substantial parallelism and interleaving and, hence, do not serve as an adequate test of the unique strength of CPM-GOMS models to accommodate parallelism and interleaving.

77 FR 40081 - Gulf of Mexico, Outer Continental Shelf (OCS), Western Planning Area (WPA) and Central Planning...

Federal Register 2010, 2011, 2012, 2013, 2014

2012-07-06

... environmental impacts resulting from the Deepwater Horizon event, BOEM conducted an extensive search for... events, including a low- probability catastrophic event associated with a proposed lease sale and a...

30 CFR 585.216 - What information will BOEM publish in the Proposed Sale Notice and Final Sale Notice?

Code of Federal Regulations, 2012 CFR

2012-07-01

... ENERGY MANAGEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY AND ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Competitive Lease Process...

30 CFR 285.215 - What areas will MMS offer in a lease sale?

Code of Federal Regulations, 2010 CFR

2010-07-01

... RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Competitive Lease Process § 285.215 What areas will MMS offer in a lease sale? The...

30 CFR 285.214 - What will MMS do with information from the Requests for Information or Calls for Information and...

Code of Federal Regulations, 2010 CFR

2010-07-01

... Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases...

30 CFR 285.216 - What information will MMS publish in the Proposed Sale Notice and Final Sale Notice?

Code of Federal Regulations, 2011 CFR

2011-07-01

... ENERGY MANAGEMENT, REGULATION, AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases...

30 CFR 585.216 - What information will BOEM publish in the Proposed Sale Notice and Final Sale Notice?

Code of Federal Regulations, 2013 CFR

2013-07-01

... ENERGY MANAGEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY AND ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Competitive Lease Process...

30 CFR 285.221 - What bidding systems may MMS use for commercial leases and limited leases?

Code of Federal Regulations, 2010 CFR

2010-07-01

..., DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Competitive Lease Award Process § 285.221 What...

30 CFR 285.231 - How will MMS process my unsolicited request for a noncompetitive lease?

Code of Federal Regulations, 2010 CFR

2010-07-01

..., DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Noncompetitive Lease Award Process § 285.231 How...

30 CFR 285.237 - What is the effective date of a lease?

Code of Federal Regulations, 2010 CFR

2010-07-01

... RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Commercial and Limited Lease Terms § 285.237 What is the effective date of a lease...

30 CFR 585.216 - What information will BOEM publish in the Proposed Sale Notice and Final Sale Notice?

Code of Federal Regulations, 2014 CFR

2014-07-01

... ENERGY MANAGEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY AND ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Competitive Lease Process...

15 CFR 930.81 - Multiple permit review.

Code of Federal Regulations, 2010 CFR

2010-01-01

...) NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION, DEPARTMENT OF COMMERCE OCEAN AND COASTAL RESOURCE MANAGEMENT FEDERAL CONSISTENCY WITH APPROVED COASTAL MANAGEMENT PROGRAMS Consistency for Outer Continental... applicable to OCS-related federal license or permit activities affecting any coastal use or resource which...

15 CFR 930.81 - Multiple permit review.

Code of Federal Regulations, 2013 CFR

2013-01-01

...) NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION, DEPARTMENT OF COMMERCE OCEAN AND COASTAL RESOURCE MANAGEMENT FEDERAL CONSISTENCY WITH APPROVED COASTAL MANAGEMENT PROGRAMS Consistency for Outer Continental... applicable to OCS-related federal license or permit activities affecting any coastal use or resource which...

15 CFR 930.81 - Multiple permit review.

Code of Federal Regulations, 2011 CFR

2011-01-01

...) NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION, DEPARTMENT OF COMMERCE OCEAN AND COASTAL RESOURCE MANAGEMENT FEDERAL CONSISTENCY WITH APPROVED COASTAL MANAGEMENT PROGRAMS Consistency for Outer Continental... applicable to OCS-related federal license or permit activities affecting any coastal use or resource which...

15 CFR 930.81 - Multiple permit review.

Code of Federal Regulations, 2014 CFR

2014-01-01

...) NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION, DEPARTMENT OF COMMERCE OCEAN AND COASTAL RESOURCE MANAGEMENT FEDERAL CONSISTENCY WITH APPROVED COASTAL MANAGEMENT PROGRAMS Consistency for Outer Continental... applicable to OCS-related federal license or permit activities affecting any coastal use or resource which...

15 CFR 930.81 - Multiple permit review.

Code of Federal Regulations, 2012 CFR

2012-01-01

...) NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION, DEPARTMENT OF COMMERCE OCEAN AND COASTAL RESOURCE MANAGEMENT FEDERAL CONSISTENCY WITH APPROVED COASTAL MANAGEMENT PROGRAMS Consistency for Outer Continental... applicable to OCS-related federal license or permit activities affecting any coastal use or resource which...

30 CFR 285.637 - When may I commence commercial operations on my commercial lease?

Code of Federal Regulations, 2010 CFR

2010-07-01

... INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF... require a FERC license (i.e., wind), then you may commence commercial operations 30 days after the CVA or...

30 CFR 285.530 - What must I do if my financial assurance lapses?

Code of Federal Regulations, 2010 CFR

2010-07-01

... OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Payments and... lapse; and (2) Provide new financial assurance in the amount set by MMS, as provided in this subpart. (b...

30 CFR 250.1602 - Applicability.

Code of Federal Regulations, 2011 CFR

2011-07-01

... development and production of elemental sulphur. Sulphur operations also include activities conducted for... INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Sulphur Operations..., development, and production operations under an OCS sulphur lease. Sulphur operations include all activities...

30 CFR 285.650 - When may I begin conducting activities under my GAP?

Code of Federal Regulations, 2010 CFR

2010-07-01

... OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Plans and... involve a project easement or the construction of facilities on the OCS that MMS has deemed to be complex...

75 FR 81950 - Flaring Versus Venting To Reduce Greenhouse Gas Emissions in the Outer Continental Shelf; Public...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-12-29

... Accounting Office (GAO) recommendation (see GAO Report below). Proposed Rulemaking BOEMRE will decide how to... vented. These regulatory changes will provide more accurate measurements of GHG emissions. Given the...

30 CFR 250.400 - Who is subject to the requirements of this subpart?

Code of Federal Regulations, 2013 CFR

2013-07-01

..., DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations General Requirements § 250.400 Who is subject to the requirements of this...

30 CFR 250.440 - What are the general requirements for BOP systems and system components?

Code of Federal Regulations, 2013 CFR

2013-07-01

... ENVIRONMENTAL ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Blowout Preventer (bop) System Requirements § 250.440 What...

30 CFR 250.440 - What are the general requirements for BOP systems and system components?

Code of Federal Regulations, 2012 CFR

2012-07-01

... ENVIRONMENTAL ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Blowout Preventer (bop) System Requirements § 250.440 What...

30 CFR 250.460 - What are the requirements for conducting a well test?

Code of Federal Regulations, 2013 CFR

2013-07-01

..., DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Other Drilling Requirements § 250.460 What are the requirements for conducting...

30 CFR 250.460 - What are the requirements for conducting a well test?

Code of Federal Regulations, 2014 CFR

2014-07-01

..., DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Other Drilling Requirements § 250.460 What are the requirements for conducting...

30 CFR 250.400 - Who is subject to the requirements of this subpart?

Code of Federal Regulations, 2014 CFR

2014-07-01

..., DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations General Requirements § 250.400 Who is subject to the requirements of this...

30 CFR 250.440 - What are the general requirements for BOP systems and system components?

Code of Federal Regulations, 2014 CFR

2014-07-01

... ENVIRONMENTAL ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Blowout Preventer (bop) System Requirements § 250.440 What...

30 CFR 250.400 - Who is subject to the requirements of this subpart?

Code of Federal Regulations, 2011 CFR

2011-07-01

... ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations General Requirements § 250.400 Who is subject to the requirements...

30 CFR 250.412 - What requirements must the location plat meet?

Code of Federal Regulations, 2010 CFR

2010-07-01

... OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Applying for A Permit to Drill § 250.412 What requirements must the location plat meet? The location plat...

30 CFR 250.426 - What are the recordkeeping requirements for casing and liner pressure tests?

Code of Federal Regulations, 2010 CFR

2010-07-01

..., DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Casing and Cementing Requirements § 250.426 What are the recordkeeping...

30 CFR 250.450 - What are the recordkeeping requirements for BOP tests?

Code of Federal Regulations, 2010 CFR

2010-07-01

... OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations... pertaining to BOP tests, actuations, and inspections at the facility for the duration of drilling. [68 FR...

30 CFR 250.469 - What other well records could I be required to submit?

Code of Federal Regulations, 2010 CFR

2010-07-01

... OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations... reports identifying microscopic fossils by depth and/or washed samples of drill cuttings that you normally...

30 CFR 250.400 - Who is subject to the requirements of this subpart?

Code of Federal Regulations, 2012 CFR

2012-07-01

..., DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations General Requirements § 250.400 Who is subject to the requirements of this...

30 CFR 250.460 - What are the requirements for conducting a well test?

Code of Federal Regulations, 2012 CFR

2012-07-01

..., DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Other Drilling Requirements § 250.460 What are the requirements for conducting...

30 CFR 285.713 - What must I do after the CVA or project engineer confirms conformance with the Fabrication and...

Code of Federal Regulations, 2010 CFR

2010-07-01

... Section 285.713 Mineral Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Facility Design...

77 FR 4056 - Outer Continental Shelf (OCS) Scientific Committee (SC); Announcement of Plenary Session

Federal Register 2010, 2011, 2012, 2013, 2014

2012-01-26

... Hotel in Reston, Virginia. The meeting will serve as a venue to introduce the newest members of the.... ADDRESSES: Reston Sheraton Hotel, 11810 Sunrise Valley Drive Reston, Virginia, 20191, telephone (703) 620...

30 CFR 285.657 - What must I do upon completion of approved activities under my GAP?

Code of Federal Regulations, 2010 CFR

2010-07-01

... THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL... your decommissioning application as provided in §§ 285.905 and 285.906. Cable and Pipeline Deviations ...

Outer Continental Shelf Lands Act Amendments Act of 2010

THOMAS, 111th Congress

Sen. Whitehouse, Sheldon [D-RI

2010-05-11

Senate - 05/25/2010 Committee on Energy and Natural Resources. Hearings held. Hearings printed: S.Hrg. 111-679, pt. 3. (All Actions) Tracker: This bill has the status IntroducedHere are the steps for Status of Legislation:

Malaysia and the Knowledge Economy: Building a World-Class Higher Education System. Human Development Sector Reports

ERIC Educational Resources Information Center

Regel, Omporn; Salmi, Jamil; Watkins, Alfred; Tan, Hong; Dawkins, John; Saroyan, Alenoush; Vestergaard, Jakob

2007-01-01

This report was prepared at the request of the Government of Malaysia (GOM) as a contribution to the long term development objectives for the university sector under the Ninth Malaysia Plan. The GOM is considering new policy directions to make the country a more competitive player in the world economy. Such a strategy will require bold innovations…

Atmospheric mercury speciation in Shanghai, China.

PubMed

Duan, Lian; Wang, Xiaohao; Wang, Dongfang; Duan, Yusen; Cheng, Na; Xiu, Guangli

2017-02-01

GEM (Gaseous elemental mercury), fine fraction (<2.5μm) PBM (Particle-bound mercury) and GOM (Gaseous oxidized mercury) were continuously monitored from Jun 1 to Dec 31 2014 at a suburban site in Shanghai. The average concentrations of GEM, PBM and GOM were 4.19±9.13ng·m -3 , 197±877pg·m -3 , 21±100pg·m -3 , respectively, which were all much higher than those at urban sites in Europe and North America and rural areas of China, but lower than those at urban sites of China. The concentrations of the three mercury species were all found with the highest concentration in December than those in summer. Overall, GEM varied little and PBM exhibited higher level during the night, while GOM typically peaked in the noon and afternoon which is consistent with that of ozone, indicating that GOM may depend on the stronger photochemical reactions during the daytime. Despite of the weak correlations of GEM with SO 2 (r=0.14, p<0.0001) and NO X (r=0.17, p<0.0001), GEM, PBM, SO 2 and NO x exhibited similar diurnal trend, suggesting that coal combustion might be the important sources of mercury in Shanghai because there is no mercury mining companies and few mercuric manufacturers in Shanghai. The strong correlation of PBM with GEM and GOM showed that directly anthropogenic emission was an important source of GEM and PBM, but the gas-particle partitioning of GOM and GEM might be also another source of PBM. The lower GEM/CO ratio of 3.9 (ng·m -3 ·ppmv -1 ) in Shanghai than that for mainland China and non-ferrous smelting factories were related to the few non-ferrous smelting factories around Shanghai. The results from the potential source contribution function (PSCF) model furtherly illustrated that in Shanghai the concentration of GEM in summer and autumn might be highly impacted by the local and regional source but wasn't heavily affected by long-range transport. Copyright © 2016 Elsevier B.V. All rights reserved.

Spatiotemporal trends in surface seawater CO2 in the Gulf of Mexico

NASA Astrophysics Data System (ADS)

Kealoha, A. K.; Shamberger, K.

2016-12-01

The Gulf of Mexico (GoM) contains many interconnected ecosystems intimately linked to regional economic stability through fisheries. Yet, numerous human pressures, including eutrophication-induced hypoxia and ocean acidification (OA), threaten the health of this large marine ecosystem. A comprehensive characterization of the drivers of GoM seawater CO2 cycling is required to assess interactions between these local stresses, global climate change, and OA. Several observational and modeling studies have been conducted in an effort to characterize CO2-system trends within the GoM. However, observational studies are limited to specific regions and time-frames, while modeled data are based on parameterizations that often cannot account for all the biogeochemical processes occurring in this complex system. Here, we present a compilation of approximately 510,000 continuous, underway measurements of sea surface temperature, salinity and seawater CO2, collected from 1996-2013 throughout the entire GoM. These data reveal distinct spatial and temporal CO2 trends that are driven primarily by temperature, Mississippi River outflow, biological productivity, and water circulation. For example, during the spring and summer, nutrient input from the Mississippi River stimulates biological productivity that drives surface seawater CO2 below atmospheric levels in the north-central GoM shelf waters. Although open ocean waters are generally a source of CO2 to the atmosphere in the summer, a unique combination of physical processes including high river discharge, offshore currents and eddy activity can transport low CO2 coastal water beyond the shelf causing vast areas, tens of thousands of square kilometers, of the open ocean to switch to a CO2 sink for several months. Since anthropogenic-driven climate change is expected to influence ocean circulation patterns, GoM CO2 source-sink characteristics and regional scale ocean carbon budgets may be altered in the future. We also combine discrete CO2 chemistry data collected in the Flower Garden Banks National Marine Sanctuary with historical underway data to provide insight into the connections between Gulf wide carbon variability and variability within these important coral reef ecosystems.

Influence of severe drought conditions on chromophoric dissolved organic matter dynamics in south Texas coastal waters

NASA Astrophysics Data System (ADS)

Miller, Stephanie A.; Shank, G. Christopher

2013-01-01

We investigated chromophoric dissolved organic matter (CDOM) dynamics in response to the severe drought conditions of 2009 in the Aransas-Copano (AC) Bay complex and adjacent nearshore Gulf of Mexico (GoM) along the southern Texas (USA) coast. Surface water absorption coefficients (a305 in m-1) were measured daily at the University of Texas at Austin Marine Science Institute (UTMSI) pier located at the interface between the AC complex and the GoM. From June to August 2009, a305 averaged 0.81 ± 0.31 m-1 compared to 1.20 ± 0.70 m-1 during summer of 2008 (June-August) and 1.84 ± 0.34 m-1 during summer 2007 (non-drought year). Despite negligible freshwater input to the AC system for most of 2009, mean a305 values for AC Bay sites were similar in 2008 and 2009, ranging from 3.24 ± 0.60 m-1 in the lower estuary to 6.22 ± 0.55 m-1 in the upper estuary during summer 2009, and 3.15 ± 0.38 m-1 to 6.81 ± 0.73 m-1 during summer 2008 (no data for 2007). CDOM photobleaching experiments were performed using a SunTest XLS + solar simulator with an irradiation spectrum that closely matches solar UV at subtropical latitudes. AC Bay samples exhibited a305 photobleaching half-lives of 33-48 h, while GoM samples exhibited a305 photobleaching half-lives of 36-89 h. We estimate that summertime photobleaching may reduce CDOM levels by >50% in the AC bay complex before discharge into the GoM and by up to 25% more throughout the nearshore waters along the western GoM shelf.

Regionally coherent Little Ice Age cooling in the Atlantic Warm Pool

USGS Publications Warehouse

Richey, J.N.; Poore, R.Z.; Flower, B.P.; Quinn, T.M.; Hollander, D.J.

2009-01-01

We present 2 new decadal-resolution foraminiferal Mg/Ca-SST records covering the past 6-8 centuries from the northern Gulf of Mexico (GOM). These records provide evidence for a Little Ice Age (LIA) cooling of 2??C, consistent with a published Mg/Ca record from Pigmy Basin. Comparison of these 3 records with existing SST proxy records from the GOM-Caribbean region show that the magnitude of LIA cooling in the Atlantic Warm Pool (AWP) was significantly larger than the mean hemispheric cooling of <1??C. We propose that a reduction in the intensity and spatial extent of the AWP during the LIA, combined with associated changes in atmospheric circulation may account for the regional SST patterns observed in the GOM-Caribbean region during the LIA. Copyright 2009 by the American Geophysical Union.

75 FR 52546 - Bureau of Ocean Energy Management, Regulation and Enforcement Outer Continental Shelf (OCS...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-08-26

... sciences, and social sciences) to review the specific studies plans of the BOEM regional offices for Fiscal... process and U.S. Geological Survey science with respect to the Deepwater Horizon incident. Following these...

76 FR 22130 - Commercial Leasing for Wind Power on the Outer Continental Shelf Offshore New Jersey-Call for...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-04-20

... the potential from offshore wind power to other electric power sources, including fossil, nuclear and... for their proposed projects on the OCS. BOEMRE/New Jersey Renewable Energy Task Force BOEMRE formed...

30 CFR 285.225 - What happens if my bid is rejected, and what are my appeal rights?

Code of Federal Regulations, 2010 CFR

2010-07-01

..., DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Competitive Lease Award Process § 285.225 What...

30 CFR 585.1018 - Who is responsible for decommissioning an OCS facility subject to an Alternate Use RUE?

Code of Federal Regulations, 2013 CFR

2013-07-01

... ENERGY MANAGEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY AND ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights of Use and Easement for Energy- and Marine-Related...

30 CFR 285.1017 - [Reserved

Code of Federal Regulations, 2010 CFR

2010-07-01

... Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights of Use and Easement for Energy- and Marine-Related Activities Using Existing OCS Facilities Alternate Use Rue Administration § 285.1017...

30 CFR 285.1017 - [Reserved

Code of Federal Regulations, 2011 CFR

2011-07-01

... Resources BUREAU OF OCEAN ENERGY MANAGEMENT, REGULATION, AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights of Use and Easement for Energy- and Marine-Related Activities Using Existing OCS Facilities Alternate Use...

30 CFR 585.1018 - Who is responsible for decommissioning an OCS facility subject to an Alternate Use RUE?

Code of Federal Regulations, 2014 CFR

2014-07-01

... ENERGY MANAGEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY AND ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights of Use and Easement for Energy- and Marine-Related...

30 CFR 285.1018 - Who is responsible for decommissioning an OCS facility subject to an Alternate Use RUE?

Code of Federal Regulations, 2010 CFR

2010-07-01

... SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights of Use and Easement for Energy- and Marine-Related Activities Using...

30 CFR 585.1018 - Who is responsible for decommissioning an OCS facility subject to an Alternate Use RUE?

Code of Federal Regulations, 2012 CFR

2012-07-01

... ENERGY MANAGEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY AND ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights of Use and Easement for Energy- and Marine-Related...

30 CFR 250.450 - What are the recordkeeping requirements for BOP tests?

Code of Federal Regulations, 2014 CFR

2014-07-01

..., DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Blowout Preventer (bop) System Requirements § 250.450 What are the... the duration of drilling. ...

30 CFR 250.450 - What are the recordkeeping requirements for BOP tests?

Code of Federal Regulations, 2012 CFR

2012-07-01

..., DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Blowout Preventer (bop) System Requirements § 250.450 What are the... the duration of drilling. ...

30 CFR 250.450 - What are the recordkeeping requirements for BOP tests?

Code of Federal Regulations, 2013 CFR

2013-07-01

..., DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Blowout Preventer (bop) System Requirements § 250.450 What are the... the duration of drilling. ...

30 CFR 250.426 - What are the recordkeeping requirements for casing and liner pressure tests?

Code of Federal Regulations, 2013 CFR

2013-07-01

... ENVIRONMENTAL ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Casing and Cementing Requirements § 250.426 What are the...

30 CFR 250.426 - What are the recordkeeping requirements for casing and liner pressure tests?

Code of Federal Regulations, 2014 CFR

2014-07-01

... ENVIRONMENTAL ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Casing and Cementing Requirements § 250.426 What are the...

30 CFR 250.440 - What are the general requirements for BOP systems and system components?

Code of Federal Regulations, 2010 CFR

2010-07-01

..., DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Blowout Preventer (bop) System Requirements § 250.440 What are the general...

30 CFR 250.426 - What are the recordkeeping requirements for casing and liner pressure tests?

Code of Federal Regulations, 2012 CFR

2012-07-01

... ENVIRONMENTAL ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Drilling Operations Casing and Cementing Requirements § 250.426 What are the...

30 CFR 250.1606 - Control of wells.

Code of Federal Regulations, 2011 CFR

2011-07-01

... INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Sulphur Operations... utilize the best available and safest drilling technologies and state-of-the-art methods to evaluate and... protection of personnel, equipment, natural resources, and the environment. ...

30 CFR 250.800 - General requirements.

Code of Federal Regulations, 2013 CFR

2013-07-01

... Mineral Resources BUREAU OF SAFETY AND ENVIRONMENTAL ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Production Safety Systems... environments. Production safety systems operated in subfreezing climates shall utilize equipment and procedures...

30 CFR 250.800 - General requirements.

Code of Federal Regulations, 2012 CFR

2012-07-01

... Mineral Resources BUREAU OF SAFETY AND ENVIRONMENTAL ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Production Safety Systems... environments. Production safety systems operated in subfreezing climates shall utilize equipment and procedures...

30 CFR 250.800 - General requirements.

Code of Federal Regulations, 2014 CFR

2014-07-01

... Mineral Resources BUREAU OF SAFETY AND ENVIRONMENTAL ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Oil and Gas Production Safety Systems... environments. Production safety systems operated in subfreezing climates shall utilize equipment and procedures...

30 CFR 285.704 - [Reserved

Code of Federal Regulations, 2010 CFR

2010-07-01

... 30 Mineral Resources 2 2010-07-01 2010-07-01 false [Reserved] 285.704 Section 285.704 Mineral Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Facility Design, Fabrication, and Installation...

30 CFR 285.711 - [Reserved

Code of Federal Regulations, 2010 CFR

2010-07-01

... 30 Mineral Resources 2 2010-07-01 2010-07-01 false [Reserved] 285.711 Section 285.711 Mineral Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Facility Design, Fabrication, and Installation...

33 CFR 135.3 - Applicability.

Code of Federal Regulations, 2012 CFR

2012-07-01

....3 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE POLLUTION FINANCIAL RESPONSIBILITY AND COMPENSATION OFFSHORE OIL POLLUTION COMPENSATION FUND General § 135.3...) Sustains an economic loss as a consequence of oil pollution arising from Outer Continental Shelf activities...

33 CFR 135.3 - Applicability.

Code of Federal Regulations, 2010 CFR

2010-07-01

....3 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE POLLUTION FINANCIAL RESPONSIBILITY AND COMPENSATION OFFSHORE OIL POLLUTION COMPENSATION FUND General § 135.3...) Sustains an economic loss as a consequence of oil pollution arising from Outer Continental Shelf activities...

33 CFR 135.3 - Applicability.

Code of Federal Regulations, 2014 CFR

2014-07-01

....3 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE POLLUTION FINANCIAL RESPONSIBILITY AND COMPENSATION OFFSHORE OIL POLLUTION COMPENSATION FUND General § 135.3...) Sustains an economic loss as a consequence of oil pollution arising from Outer Continental Shelf activities...

33 CFR 135.3 - Applicability.

Code of Federal Regulations, 2013 CFR

2013-07-01

....3 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE POLLUTION FINANCIAL RESPONSIBILITY AND COMPENSATION OFFSHORE OIL POLLUTION COMPENSATION FUND General § 135.3...) Sustains an economic loss as a consequence of oil pollution arising from Outer Continental Shelf activities...

30 CFR 291.104 - Who may file a complaint or a third-party brief?

Code of Federal Regulations, 2010 CFR

2010-07-01

... APPEALS OPEN AND NONDISCRIMINATORY ACCESS TO OIL AND GAS PIPELINES UNDER THE OUTER CONTINENTAL SHELF LANDS... subpart if you are a shipper and you believe that you have been denied open and nondiscriminatory access...

30 CFR 250.915 - What are the CVA's primary responsibilities?

Code of Federal Regulations, 2010 CFR

2010-07-01

... OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Platforms and Structures... or organizations acting as CVAs must not function in any capacity that would create a conflict of... design, fabrication and installation of the platform. ...

30 CFR 250.298 - How long will MMS take to evaluate and make a decision on the CID?

Code of Federal Regulations, 2010 CFR

2010-07-01

... THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Plans and... CID request based on your commitment to develop economically producible reservoirs according to sound...

78 FR 27430 - Notice on Outer Continental Shelf Oil and Gas Lease Sales

Federal Register 2010, 2011, 2012, 2013, 2014

2013-05-10

... III. Eni Petroleum Co. Inc. Eni Petroleum US LLC Eni Oil US LLC Eni Marketing Inc. Eni BB Petroleum Inc. Eni US Operating Co. Inc. Eni BB Pipeline LLC Group IV. Exxon Mobil Corporation ExxonMobil...

76 FR 4129 - Notice on Outer Continental Shelf Oil and Gas Lease Sales

Federal Register 2010, 2011, 2012, 2013, 2014

2011-01-24

... Eni Petroleum Co. Inc. Eni Petroleum US LLC. Eni Oil US LLC. Eni Marketing Inc. Eni BB Petroleum Inc. Eni US Operating Co. Inc. Eni BB Pipeline LLC. Group VII Petrobras America Inc. Petroleo Brasileiro S...

30 CFR 285.510 - May MMS reduce or waive my lease or grant payments?

Code of Federal Regulations, 2010 CFR

2010-07-01

... OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Payments and... application to us that includes all of the following: (1) The number of the lease, ROW grant, or RUE grant...

75 FR 76632 - Oil and Gas and Sulphur Operations in the Outer Continental Shelf-Increased Safety Measures for...

Federal Register 2010, 2011, 2012, 2013, 2014

2010-12-09

...? * * * * * (d) In areas containing permafrost, setting depths for conductor and surface casing based on the anticipated depth of the permafrost. Your program must provide protection from thaw subsidence and freezeback...

30 CFR 254.22 - What information must I include in the “Introduction and plan contents” section?

Code of Federal Regulations, 2014 CFR

2014-07-01

... ENVIRONMENTAL ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL-SPILL RESPONSE REQUIREMENTS FOR FACILITIES LOCATED SEAWARD OF THE COAST LINE Oil-Spill Response Plans for Outer Continental Shelf Facilities § 254.22...

30 CFR 254.22 - What information must I include in the “Introduction and plan contents” section?

Code of Federal Regulations, 2013 CFR

2013-07-01

... ENVIRONMENTAL ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL-SPILL RESPONSE REQUIREMENTS FOR FACILITIES LOCATED SEAWARD OF THE COAST LINE Oil-Spill Response Plans for Outer Continental Shelf Facilities § 254.22...

30 CFR 254.22 - What information must I include in the “Introduction and plan contents” section?

Code of Federal Regulations, 2012 CFR

2012-07-01

... ENVIRONMENTAL ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE OIL-SPILL RESPONSE REQUIREMENTS FOR FACILITIES LOCATED SEAWARD OF THE COAST LINE Oil-Spill Response Plans for Outer Continental Shelf Facilities § 254.22...

Variation in wind and piscivorous predator fields affecting the survival of Atlantic salmon, Salmo salar, in the Gulf of Maine

USGS Publications Warehouse

Friedland, K.D.; Manning, J.P.; Link, Jason S.; Gilbert, J.R.; Gilbert, A.T.; O'Connell, A.F.

2012-01-01

Observations relevant to the North American stock complex of Atlantic salmon, Salmo salar L., suggest that marine mortality is influenced by variation in predation pressure affecting post-smolts during the first months at sea. This hypothesis was tested for Gulf of Maine (GOM) stocks by examining wind pseudostress and the distribution of piscivorous predator fields potentially affecting post-smolts. Marine survival has declined over recent decades with a change in the direction of spring winds, which is likely extending the migration of post-smolts by favouring routes using the western GOM. In addition to changes in spring wind patterns, higher spring sea surface temperatures have been associated with shifting distributions of a range of fish species. The abundance of several pelagic piscivores, which based on their feeding habits may predate on salmon post-smolts, has increased in the areas that serve as migration corridors for post-smolts. In particular, populations of silver hake, Merluccius bilinearis (Mitchell), red hake, Urophycis chuss (Walbaum), and spiny dogfish, Squalus acanthias L., increased in size in the portion of the GOM used by post-smolts. Climate variation and shifting predator distributions in the GOM are consistent with the predator hypothesis of recruitment control suggested for the stock complex.

Nitrogen delivery from the Mississippi-Atchafalaya River Basin to the Gulf of Mexico: magnitude, attribution, and uncertainty

NASA Astrophysics Data System (ADS)

Tian, H.; Xu, R.; Yang, J.; Zhang, B.; Yao, Y.; Pan, S.; Cai, W. J.; Lohrenz, S. E.

2017-12-01

The northern Gulf of Mexico (GOM), as one of the largest hypoxic zone in the world, is near the outlet of the Mississippi-Atchafalaya River Basin (MARB) that contributed to the increased fluxes of agriculturally derived nitrogen (N) since the 1950s. This increase of N exports could be primarily attributed to anthropogenic N inputs into the MARB (e.g., N fertilizer application), climate (e.g., precipitation), and land use change. A long-term data of monthly/annual dissolved inorganic nitrogen (DIN) exports from the MARB to the GOM had been released by the United States Geological Survey (USGS) since the 1970s. However, on one hand, dissolved organic nitrogen (DON) also plays an active role in supplying N for phytoplankton and bacteria in aquatic ecosystems; on the other hand, monitoring data provided by the USGS could not attribute the contributions of various factors to this N increase in the northern GOM. Here, we used a coupled hydrological-biogeochemical model, the Dynamic Land Ecosystem Model, to examine changes in DIN (ammonium and nitrate) and DON exports from the MARB to the GOM during 1901 2014. Meanwhile, we investigated how climate variability, land use change, land management, and atmospheric chemistry affected the annual and seasonal patterns of N export in the study area.

Geographic variation in Northwest Atlantic fin whale (Balaenoptera physalus) song: implications for stock structure assessment.

PubMed

Delarue, Julien; Todd, Sean K; Van Parijs, Sofie M; Di Iorio, Lucia

2009-03-01

Passive acoustic data are increasingly being used as a tool for helping to define marine mammal populations and stocks. Fin whale (Balaenoptera physalus) songs present a unique opportunity to determine interstock differences. Their highly stereotyped interpulse interval has been shown to vary between geographic areas and to remain stable over time in some areas. In this study the structure of songs recorded at two geographically close feeding aggregations in the Gulf of St. Lawrence (GSL) and Gulf of Maine (GoM) was compared. Recordings were made from September 2005 through February 2006 in the GSL and intermittently between January 2006 and September 2007 at two locations in the GoM. 6257 pulse intervals corresponding to 19 GSL and 29 GoM songs were measured to characterize songs from both areas. Classification trees showed that GSL songs differ significantly from those in the GoM. The results are consistent with those derived from other stock structure assessment methodologies, such as chemical signature and photoidentification analysis, suggesting that fin whales in these areas may form separate management stocks. Song structure analysis could therefore provide a useful and cost-efficient tool for defining conservation units over temporal and geographical scales relevant to management objectives in fin whales.

Assessment of Gaseous Oxidized Mercury Measurement Accuracy at an Atmospheric Mercury Network (AMNet) Site

NASA Astrophysics Data System (ADS)

Luke, W. T.

2016-12-01

Recent laboratory and field research has documented and explored the biases and inaccuracies of the measurement of gaseous oxidized mercury (GOM) compounds using KCl-coated denuders. We report on the development of a simple, automated GOM calibration source and its deployment at NOAA/Air Resources Laboratory's Atmospheric Mercury Network (AMNet) site at the Mauna Loa Observatory (MLO) on the island of Hawaii. NOAA/ARL has developed a permeation-tube based calibration source with an extremely simple flow path that minimizes surface adsorptive effects and losses. The source was used to inject HgBr2 into one of two side-by-side Tekran® mercury speciation systems at MLO to characterize GOM measurement accuracy under a variety of atmospheric conditions. Due to its unique topography and meteorology, MLO experiences katabatic (upslope/downslope) mesoscale flow superimposed on the synoptic trade wind circulation of the tropics. Water vapor, ozone, and other trace atmospheric constituents often display pronounced diurnal variations at the site, which frequently encounters air characteristic of the middle free troposphere at night, and of the tropical marine boundary layer during the day. Results presented here will assist in the better understanding of the biases underlying GOM measurements in global mercury monitoring networks and may allow the development of correction factors for ambient data.

The stratigraphy of the southern Pab Range, Pakistan

NASA Astrophysics Data System (ADS)

White, H. J.

The Cretaceous strata exposed in the southern Pab Range, southeast Baluchistan, Pakistan is investigated. It records the precollision deposition history of the Indo-Pakistani continental shelf. The strata comprise two depositional successions, namely, The Early to Late Cretaceous Sembar-Goru-Parh sequence and the Maestrichtian Mughal Kot-Pab sequence. The former began with deposition of black shales on the continental slope (Sembar Formation), succeeded by calcareous shale, marl and micstone of outer shelf origin (Goru Formation), and ended with inner shelf platform carbonates (Parh Limestone). These deep to shallow water lithofacies prograted westward over the continental shelf of the north-advancing Subcontinent. The Mughal Kot-Pab propagation contains the first significant influx of terrigenous sand reaching the western portion of the continental shelf. Deposition environments in the Mughal Kot Formation include inner shelf, prodelta, delta front and distributary channel. A thick succession of shoreface cycles comprises the Pab sandstone.

Blowout Prevention System Events and Equipment Component Failures : 2016 SafeOCS Annual Report

DOT National Transportation Integrated Search

2017-09-22

The SafeOCS 2016 Annual Report, produced by the Bureau of Transportation Statistics (BTS), summarizes blowout prevention (BOP) equipment failures on marine drilling rigs in the Outer Continental Shelf. It includes an analysis of equipment component f...

30 CFR 585.232 - May I acquire a lease noncompetitively after responding to a Request for Interest or Call for...

Code of Federal Regulations, 2014 CFR

2014-07-01

... Resources BUREAU OF OCEAN ENERGY MANAGEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY AND ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases...

30 CFR 285.223 - What does MMS do if there is a tie for the highest bid?

Code of Federal Regulations, 2010 CFR

2010-07-01

... INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Competitive Lease Award Process § 285.223 What does MMS do if there...

30 CFR 285.304 - [Reserved

Code of Federal Regulations, 2011 CFR

2011-07-01

... Resources BUREAU OF OCEAN ENERGY MANAGEMENT, REGULATION, AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights-of-Way Grants and Rights-of-Use and Easement Grants for Renewable Energy Activities Row Grants and Rue...

30 CFR 285.235 - If I have a commercial lease, how long will my lease remain in effect?

Code of Federal Regulations, 2010 CFR

2010-07-01

..., DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Commercial and Limited Lease Terms § 285.235 If I...

30 CFR 585.232 - May I acquire a lease noncompetitively after responding to a Request for Interest or Call for...

Code of Federal Regulations, 2013 CFR

2013-07-01

... Resources BUREAU OF OCEAN ENERGY MANAGEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY AND ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases...

30 CFR 585.214 - What will BOEM do with information from the Requests for Information or Calls for Information and...

Code of Federal Regulations, 2013 CFR

2013-07-01

... Resources BUREAU OF OCEAN ENERGY MANAGEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY AND ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases...

30 CFR 285.233-285.234 - [Reserved

Code of Federal Regulations, 2011 CFR

2011-07-01

....234 Mineral Resources BUREAU OF OCEAN ENERGY MANAGEMENT, REGULATION, AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Noncompetitive Lease Award Process §§ 285.233-285.234...

30 CFR 285.233-285.234 - [Reserved

Code of Federal Regulations, 2010 CFR

2010-07-01

....234 Mineral Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Noncompetitive Lease Award Process §§ 285.233-285.234 [Reserved] Commercial and Limited...

30 CFR 285.226-285.229 - [Reserved

Code of Federal Regulations, 2010 CFR

2010-07-01

....229 Mineral Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Competitive Lease Award Process §§ 285.226-285.229 [Reserved] Noncompetitive Lease Award...

30 CFR 285.311-285.314 - [Reserved

Code of Federal Regulations, 2011 CFR

2011-07-01

....314 Mineral Resources BUREAU OF OCEAN ENERGY MANAGEMENT, REGULATION, AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights-of-Way Grants and Rights-of-Use and Easement Grants for Renewable Energy Activities...

30 CFR 285.232 - May I acquire a lease noncompetitively after responding to a Request for Interest or Call for...

Code of Federal Regulations, 2010 CFR

2010-07-01

... RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Noncompetitive Lease Award Process § 285.232 May I acquire a lease noncompetitively...

30 CFR 285.217-285.219 - [Reserved

Code of Federal Regulations, 2010 CFR

2010-07-01

....219 Mineral Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Competitive Lease Process §§ 285.217-285.219 [Reserved] Competitive Lease Award Process ...

30 CFR 285.207-285.209 - [Reserved

Code of Federal Regulations, 2010 CFR

2010-07-01

....209 Mineral Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases General Lease Information §§ 285.207—285.209 [Reserved] Competitive Lease Process ...

30 CFR 285.226-285.229 - [Reserved

Code of Federal Regulations, 2011 CFR

2011-07-01

....229 Mineral Resources BUREAU OF OCEAN ENERGY MANAGEMENT, REGULATION, AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Competitive Lease Award Process §§ 285.226-285.229...

30 CFR 585.214 - What will BOEM do with information from the Requests for Information or Calls for Information and...

Code of Federal Regulations, 2014 CFR

2014-07-01

... Resources BUREAU OF OCEAN ENERGY MANAGEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY AND ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases...

30 CFR 585.232 - May I acquire a lease noncompetitively after responding to a Request for Interest or Call for...

Code of Federal Regulations, 2012 CFR

2012-07-01

... Resources BUREAU OF OCEAN ENERGY MANAGEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY AND ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases...

30 CFR 585.214 - What will BOEM do with information from the Requests for Information or Calls for Information and...

Code of Federal Regulations, 2012 CFR

2012-07-01

... Resources BUREAU OF OCEAN ENERGY MANAGEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY AND ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases...

30 CFR 285.217-285.219 - [Reserved

Code of Federal Regulations, 2011 CFR

2011-07-01

....219 Mineral Resources BUREAU OF OCEAN ENERGY MANAGEMENT, REGULATION, AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Competitive Lease Process §§ 285.217-285.219 [Reserved...

30 CFR 285.117 - [Reserved

Code of Federal Regulations, 2010 CFR

2010-07-01

... 30 Mineral Resources 2 2010-07-01 2010-07-01 false [Reserved] 285.117 Section 285.117 Mineral Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF General Provisions § 285.117 [Reserved] ...

30 CFR 285.236 - If I have a limited lease, how long will my lease remain in effect?

Code of Federal Regulations, 2010 CFR

2010-07-01

..., DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Issuance of OCS Renewable Energy Leases Commercial and Limited Lease Terms § 285.236 If I...

30 CFR 285.911 - [Reserved

Code of Federal Regulations, 2010 CFR

2010-07-01

... 30 Mineral Resources 2 2010-07-01 2010-07-01 false [Reserved] 285.911 Section 285.911 Mineral Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Decommissioning Facility Removal § 285.911...

30 CFR 250.200 - Definitions.

Code of Federal Regulations, 2011 CFR

2011-07-01

... Information Document CZMA means Coastal Zone Management Act DOCD means Development Operations Coordination... OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Plans and Information General Information § 250.200 Definitions. Acronyms and terms used in this subpart have the following meanings: (a...

30 CFR 250.1602 - Applicability.

Code of Federal Regulations, 2010 CFR

2010-07-01

... Mineral Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE OIL AND GAS AND SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Sulphur Operations § 250.1602 Applicability. (a) The requirements of this subpart P are applicable to all exploration, development, and production operations under an...

15 CFR 923.53 - Federal consistency procedures.

Code of Federal Regulations, 2011 CFR

2011-01-01

... MANAGEMENT COASTAL ZONE MANAGEMENT PROGRAM REGULATIONS Coordination, Public Involvement and National Interest...); (3) For States anticipating coastal zone effects from Outer Continental Shelf (OCS) activities, the..., which in the opinion of the State agency are likely to significantly affect the coastal zone and thereby...

15 CFR 923.53 - Federal consistency procedures.

Code of Federal Regulations, 2010 CFR

2010-01-01

... MANAGEMENT COASTAL ZONE MANAGEMENT PROGRAM REGULATIONS Coordination, Public Involvement and National Interest...); (3) For States anticipating coastal zone effects from Outer Continental Shelf (OCS) activities, the..., which in the opinion of the State agency are likely to significantly affect the coastal zone and thereby...

30 CFR 585.1017 - [Reserved

Code of Federal Regulations, 2012 CFR

2012-07-01

... Resources BUREAU OF OCEAN ENERGY MANAGEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY AND ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights of Use and Easement for Energy- and Marine-Related Activities Using Existing OCS Facilities Alternate Use Rue Administration § 585...

30 CFR 585.1001-585.1003 - [Reserved

Code of Federal Regulations, 2014 CFR

2014-07-01

...-585.1003 Mineral Resources BUREAU OF OCEAN ENERGY MANAGEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY AND ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights of Use and Easement for Energy- and Marine-Related Activities Using Existing OCS Facilities Regulated Activities...

30 CFR 285.1001-285.1003 - [Reserved

Code of Federal Regulations, 2011 CFR

2011-07-01

...-285.1003 Mineral Resources BUREAU OF OCEAN ENERGY MANAGEMENT, REGULATION, AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights of Use and Easement for Energy- and Marine-Related Activities Using Existing OCS...

30 CFR 585.1001-585.1003 - [Reserved

Code of Federal Regulations, 2012 CFR

2012-07-01

...-585.1003 Mineral Resources BUREAU OF OCEAN ENERGY MANAGEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY AND ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights of Use and Easement for Energy- and Marine-Related Activities Using Existing OCS Facilities Regulated Activities...

30 CFR 585.1001-585.1003 - [Reserved

Code of Federal Regulations, 2013 CFR

2013-07-01

...-585.1003 Mineral Resources BUREAU OF OCEAN ENERGY MANAGEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY AND ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights of Use and Easement for Energy- and Marine-Related Activities Using Existing OCS Facilities Regulated Activities...

30 CFR 285.100 - Authority.

Code of Federal Regulations, 2011 CFR

2011-07-01

... Resources BUREAU OF OCEAN ENERGY MANAGEMENT, REGULATION, AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF General... the Energy Policy Act of 2005 (EPAct) (Pub. L. 109-58). The Secretary of the Interior delegated to the...

30 CFR 285.1008-285.1009 - [Reserved

Code of Federal Regulations, 2011 CFR

2011-07-01

...-285.1009 Mineral Resources BUREAU OF OCEAN ENERGY MANAGEMENT, REGULATION, AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights of Use and Easement for Energy- and Marine-Related Activities Using Existing OCS...

30 CFR 585.1017 - [Reserved

Code of Federal Regulations, 2014 CFR

2014-07-01

... Resources BUREAU OF OCEAN ENERGY MANAGEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY AND ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights of Use and Easement for Energy- and Marine-Related Activities Using Existing OCS Facilities Alternate Use Rue Administration § 585...

30 CFR 585.1017 - [Reserved

Code of Federal Regulations, 2013 CFR

2013-07-01

... Resources BUREAU OF OCEAN ENERGY MANAGEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY AND ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Rights of Use and Easement for Energy- and Marine-Related Activities Using Existing OCS Facilities Alternate Use Rue Administration § 585...

Gray whale, Eschrichtius robustus, bibliography. Final report

DOE Office of Scientific and Technical Information (OSTI.GOV)

Setzler-Hamilton, E.; Oliver, G.W.

1987-01-01

The report categorizes the research literature on gray whales according to major research topics, issues of concern to Outer Continental Shelf oil and gas development, and geographic areas. The report has an extensive cross-index. Selected references are depicted on an accompanying poster.

Right whale, Balaena glacialis, bibliography. Final report

DOE Office of Scientific and Technical Information (OSTI.GOV)

Setzler-Hamilton, E.M.; Oliver, G.W.

1989-12-01

The report categorizes the research literature on right whales according to major research topics, issues of concern to Outer Continental Shelf oil and gas development, and geographic areas. The report has an extensive cross index. Selected references are depicted on an accompanying poster.

30 CFR 270.4 - Discrimination prohibited.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 30 Mineral Resources 2 2011-07-01 2011-07-01 false Discrimination prohibited. 270.4 Section 270.4 Mineral Resources BUREAU OF OCEAN ENERGY MANAGEMENT, REGULATION, AND ENFORCEMENT, DEPARTMENT OF THE INTERIOR OFFSHORE NONDISCRIMINATION IN THE OUTER CONTINENTAL SHELF § 270.4 Discrimination prohibited. No...

30 CFR 270.4 - Discrimination prohibited.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 30 Mineral Resources 2 2010-07-01 2010-07-01 false Discrimination prohibited. 270.4 Section 270.4 Mineral Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE NONDISCRIMINATION IN THE OUTER CONTINENTAL SHELF § 270.4 Discrimination prohibited. No contract or subcontract to which...

78 FR 59632 - Oil and Gas and Sulphur Operations on the Outer Continental Shelf-Oil and Gas Production Safety...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-09-27

... comments to the Department of the Interior (DOI); Bureau of Safety and Environmental Enforcement; Attention... divide the current subpart H into multiple sections to make the regulations easier to read and understand...

30 CFR 250.1633 - Production measurement.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 30 Mineral Resources 2 2010-07-01 2010-07-01 false Production measurement. 250.1633 Section 250... SULPHUR OPERATIONS IN THE OUTER CONTINENTAL SHELF Sulphur Operations § 250.1633 Production measurement. (a) General. Measurement equipment and security procedures shall be designed, installed, used, maintained, and...

33 CFR 140.20 - Delegations.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false Delegations. 140.20 Section 140.20 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OUTER CONTINENTAL SHELF ACTIVITIES GENERAL General § 140.20 Delegations. (a) Each District Commander is responsible...

33 CFR 140.20 - Delegations.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Delegations. 140.20 Section 140.20 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OUTER CONTINENTAL SHELF ACTIVITIES GENERAL General § 140.20 Delegations. (a) Each District Commander is responsible...

30 CFR 285.649 - [Reserved

Code of Federal Regulations, 2010 CFR

2010-07-01

... 30 Mineral Resources 2 2010-07-01 2010-07-01 false [Reserved] 285.649 Section 285.649 Mineral Resources MINERALS MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE RENEWABLE ENERGY ALTERNATE USES OF EXISTING FACILITIES ON THE OUTER CONTINENTAL SHELF Plans and Information Requirements Contents of...

30 CFR 250.200 - Definitions.

Code of Federal Regulations, 2010 CFR

2010-07-01

... OPERATIONS IN THE OUTER CONTINENTAL SHELF Plans and Information General Information § 250.200 Definitions... 30 Mineral Resources 2 2010-07-01 2010-07-01 false Definitions. 250.200 Section 250.200 Mineral... subpart are listed alphabetically below: CID means Conservation Information Document CZMA means Coastal...

50 CFR 216.214 - Prohibitions.

Code of Federal Regulations, 2010 CFR

2010-10-01

..., DEPARTMENT OF COMMERCE MARINE MAMMALS REGULATIONS GOVERNING THE TAKING AND IMPORTING OF MARINE MAMMALS Taking of Marine Mammals Incidental to Explosive Severance Activities Conducted During Offshore Structure Removal Operations on the Outer Continental Shelf in the U.S. Gulf of Mexico § 216.214 Prohibitions. No...

33 CFR 146.45 - Pollution incidents.

Code of Federal Regulations, 2010 CFR

2010-07-01

... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Pollution incidents. 146.45...) OUTER CONTINENTAL SHELF ACTIVITIES OPERATIONS OCS Facilities § 146.45 Pollution incidents. Oil pollution.... Additional provisions concerning liability and compensation because of oil pollution are contained in...

33 CFR 146.45 - Pollution incidents.

Code of Federal Regulations, 2011 CFR

2011-07-01

... 33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false Pollution incidents. 146.45...) OUTER CONTINENTAL SHELF ACTIVITIES OPERATIONS OCS Facilities § 146.45 Pollution incidents. Oil pollution.... Additional provisions concerning liability and compensation because of oil pollution are contained in...

76 FR 67759 - Notice on Outer Continental Shelf Oil and Gas Lease Sales

Federal Register 2010, 2011, 2012, 2013, 2014

2011-11-02

... and Exploration Company Inexeco Oil Company Group VI Eni Petroleum Co. Inc. Eni Petroleum US LLC Eni Oil US LLC Eni Marketing Inc Eni BB Petroleum Inc. Eni US Operating Co. Inc. Eni BB Pipeline LLC Group...

76 FR 28449 - Notice on Outer Continental Shelf Oil and Gas Lease Sales

Federal Register 2010, 2011, 2012, 2013, 2014

2011-05-17

... Company, Inexeco Oil Company. Group VI. Eni Petroleum Co. Inc., Eni Petroleum US LLC, Eni Oil US LLC, Eni Marketing Inc., Eni BB Petroleum Inc., Eni US Operating Co. Inc., Eni BB Pipeline LLC. Group VII. Petrobras...

78 FR 64243 - Notice on Outer Continental Shelf Oil and Gas Lease Sales

Federal Register 2010, 2011, 2012, 2013, 2014

2013-10-28

... III Eni Petroleum Co. Inc. Eni Petroleum US LLC Eni Oil US LLC Eni Marketing Inc. Eni BB Petroleum Inc. Eni US Operating Co. Inc. Eni BB Pipeline LLC Group IV Exxon Mobil Corporation ExxonMobil Exploration...

77 FR 64826 - Notice on Outer Continental Shelf Oil and Gas Lease Sales

Federal Register 2010, 2011, 2012, 2013, 2014

2012-10-23

.... Eni Petroleum Co. Inc. Eni Petroleum US LLC Eni Oil US LLC Eni Marketing Inc Eni BB Petroleum Inc. Eni US Operating Co. Inc. Eni BB Pipeline LLC Group VII. Statoil ASA Statoil Gulf of Mexico LLC Statoil...

33 CFR 146.45 - Pollution incidents.

Code of Federal Regulations, 2014 CFR

2014-07-01

... 33 Navigation and Navigable Waters 2 2014-07-01 2014-07-01 false Pollution incidents. 146.45...) OUTER CONTINENTAL SHELF ACTIVITIES OPERATIONS OCS Facilities § 146.45 Pollution incidents. Oil pollution.... Additional provisions concerning liability and compensation because of oil pollution are contained in...

33 CFR 146.45 - Pollution incidents.

Code of Federal Regulations, 2013 CFR

2013-07-01

... 33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false Pollution incidents. 146.45...) OUTER CONTINENTAL SHELF ACTIVITIES OPERATIONS OCS Facilities § 146.45 Pollution incidents. Oil pollution.... Additional provisions concerning liability and compensation because of oil pollution are contained in...

33 CFR 146.45 - Pollution incidents.

Code of Federal Regulations, 2012 CFR

2012-07-01

... 33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false Pollution incidents. 146.45...) OUTER CONTINENTAL SHELF ACTIVITIES OPERATIONS OCS Facilities § 146.45 Pollution incidents. Oil pollution.... Additional provisions concerning liability and compensation because of oil pollution are contained in...