The climate record preserved in polar glaciers, mountain glaciers, and widespread cave deposits shows repeated occurrence of abrupt global transitions between cold/dry stadial and warm/wet interstadial states during glacial periods. These abrupt transitions occur on millennial time scale and in the absence of any ...
E-print Network
Understanding the mechanisms of past climate changes requires modelling of the complex interaction between all major components of the Earth system: atmosphere, ocean, cryosphere, lithosphere and biosphere. This paper reviews attempts at such an integrative approach to modelling climate changes during the glacial age. In particular, ...
PubMed
Understanding abrupt climate changes requires detailed spatial/temporal records of such changes, and to make these records, we need rapidly responding, geographically widespread climate trackers. Glacial systems are such trackers, and recent additions to the stratigraphic record show overall synchronous ...
PubMed Central
Evidence suggests that the last glacial period came to an abrupt close about 13,500 years ago. This evidence indicates: (1) that the melting of the North American ice sheet commenced abruptly at this time; (2) that surface temperatures in the northern Atlantic rose sharply at this time; (3) that surface water conditions in the ...
Energy Citations Database
Over the last decade, paleoclimatic data from ice cores and sediments have shown that the climate system is capable of switching between significantly different modes, suggesting that climatic surprises may lie ahead. Most attention in the growing area of abrupt climatic change research continues to be focused on ...
In contrast to the relatively stable climate of the past 10,000 years, during glacial times the North Atlantic region experienced large-amplitude transitions between cold (stadial) and warm (interstadial) states. In this modeling study, we demonstrate that hydrological interactions between the Atlantic thermohaline circulation (THC) and adjacent ...
Results demonstrating an abrupt change in the rate and character of sedimentation in the South China
NASA Technical Reports Server (NTRS)
Subpolar North Atlantic proxy records document millennial-scale climate variations 500,000 to 340,000 years ago. The cycles have an approximately constant pacing that is similar to that documented for the last glacial cycle. These findings suggest that such climate variations are inherent to the late Pleistocene, regardless of ...
The issue of abrupt climate change has been highlighted by a recent National Academy of Sciences (NRC) study as one of the most troubling potential aspects of future global climate change. The science of abrupt climate change originated in the discovery and study of huge ...
NASA Astrophysics Data System (ADS)
Lake sediment core lithostratigraphy, in conjunction with AMS radiocarbon dated macrofossils, geochemistry and palynology, were used to constrain mountain glacier and paleoclimate fluctuations in the Venezuelan Andes during the Late Glacial and Preboreal intervals. Glaciers retreated during an abrupt shift to warmer and wetter conditions at the onset of ...
Understanding the origin of sub-Milankovitch and millennial-scale abrupt climate change still poses a major challenge. An important role of communicating the orbital-scale forcing into abrupt climate change on millennial and centennial timescales has been hypothesized for the tropics in earlier studies. Moreover, ...
Advances in understanding Earth�s climate system depend upon linking high-resolution sediment archives from the oceans, ice sheets and continents, and interpreting these records in the context Earth system models. Marine sediment, ice core and speleothem records have provided detailed histories of abrupt climate change during the ...
Post-glacial lacustrine and marine sediments of the Lake Champlain region range from 20 to >50 meters in thickness presenting an opportunity to assess the timing of North American glacial lake drainage at multidecadal timescales and evaluate its effect on North Atlantic salinity and abrupt climate events 13.5 to ...
This study presents the sedimentological relationships between interbedded carbonate marine sediments and siliciclastic glacial deposit in the Sound of Iona. In this area there is an abrupt vertical and lateral facies transition between siliciclastic sediments deposited in turbid, cold water and biogenic limestones deposited in clear, warm water. The ...
Inferences of past climatic conditions from a sedimentary record from Big Lake, British Columbia, Canada, over the past 5,500 years show strong millennial-scale patterns, which oscillate between periods of wet and drier climatic conditions. Higher frequency decadal- to centennial-scale fluctuations also occur within the dominant millennial-scale patterns. ...
Information about the "abrupt climate change" phenomenon characterized by rapid changes in the Earth's climate....
NBII National Biological Information Infrastructure
High-resolution scanning Synchrotron Radiation X-ray Fluorescence Analysis (SRXFA) was applied to investigate the downcore distribution of elements in the sediments from Lake Baikal (East Siberia). The obtained multi-element time series reveal the presence of abrupt climate shifts in East Siberia which were synchronous with the abrupt ...
Although abrupt climate changes can occur for many reasons, it is conceivable that human forcing of climate change is increasing the probability of large, abrupt ...
NASA Website
There is a growing body of theoretical and empirical support for the concept of instabilities in the climate system, and indications that abrupt climate change may in some cases contribute to abrupt extinctions. Theoretical indications of instabilities ca...
National Technical Information Service (NTIS)
Across North and South America, the final millennia of the Pleistocene saw dramatic changes in climate, vegetation, fauna, fire regime, and other local and regional paleo-environmental characteristics. Rapid climate shifts following the Last Glacial Maximum (LGM) exerted a first-order influence, but abrupt ...
USGS Publications Warehouse
As the most distant arm of the Atlantic Ocean, the Black Sea demonstrates an unparalleled feature: it oscillates between lacustrine and marine stages following, respectively, glacial-interglacial sea level changes. Today, the Black Sea is the world's largest anoxic basin. Coring efforts during the last years rather suggested an extensive glacial sediment ...
Large, abrupt shifts in the [sup 18]O/[sup 16]O ratio found in Greenland ice must reflect real features of the climate system variability. These isotopic shifts can be viewed as a result of air temperature fluctuations, but determination of the cause of the changes - the most crucial issue for future climate concerns - requires a ...
The Cariaco Basin, located off the Venezuelan coast in northern South America, is a sensitive recorder of tropical Atlantic climate variability. For example, analyses of stable carbon isotopic compositions of individual vascular plant leaf waxes preserved in Cariaco Basin sediments have revealed precipitation-driven vegetation shifts during the last ...
This press release summarizes the results of research on sediment cores taken from the subtropical Atlantic Ocean. Analyses of organic molecules from planktonic algae in the sediments indicates that large and abrupt temperature changes in warm areas of the ocean occurred at the end of the last glacial period.
NSDL National Science Digital Library
Many regions of the world experienced abrupt climate variability during the last glacial period (75-15thousand years ago). These changes probably arose from interactions between Northern Hemisphere ice sheets and circulation in the North Atlantic Ocean, but the rapid and widespread propagation of these changes requires a large-scale ...
A striking characteristic of glacial climate in the North Atlantic region is the recurrence of abrupt shifts between cold stadials and mild interstadials. These shifts have been associated with abrupt changes in Atlantic Meridional Overturning Circulation (AMOC) mode, possibly in response to ...
Climates have sometimes changed abruptly in the past as a result of volcanic eruptions or impacts of huge rocks from space.
In this activity, students work with paleoclimate proxy data (d18O, CH4, CO2)from the Byrd and GISP2 ice cores to investigate millennial-scale climate changes during the Last Glacial/Deglacial time periods. Students must prepare a publication quality plot of the data and answer several questions about the similarities and differences between the ...
The role that tropical Pacific ocean/atmospheric variability has had in abrupt climatic changes throughout the Quaternary continues to be debated. The debate centers in part, on how representative modern ocean/atmospheric variability in the tropical Pacific is for characterizing past variability, particularly protracted climatic ...
Agriculture began in the eastern Mediterranean region of Southwest Asia at the end of the Younger Dryas and rapidly spread north and eastward during the Climatic Optimum. According to pollen records, during the Late Glacial, large seeded cereals and legumes persisted only in sheltered niches, but began to spread with subsequent warming and the ...
We thank Eric Steig for his thoughtful comments, and we would like to reply to his three points. First, Steig notes that our results may challenge the assumed importance of meltwater in abrupt climate change. Although this may be one possible outcome of our work, the ongoing nature of our work on a Lake Agassiz meltwater source makes us offer that ...
The Last Glacial-Interglacial Transition (LGIT) is one of the most intensively studied periods in Earth History. The stratigraphy of this period has been thoroughly investigated and, in particular, the recently proposed event stratigraphy for the Last Glacial-Interglacial Transition based on the Greenland ice core records serves as a tool for ...
The dynamics of the North Atlantic subpolar gyre (SPG) are assessed under present and glacial boundary conditions by investigating the SPG sensitivity to surface wind-stress changes in a coupled climate model. To this end, the gyre transport is decomposed in Ekman, thermohaline, and bottom transports. Surface wind-stress variations are found to play an ...
The European Alps were largely covered by ice during full glacial conditions of the Pleistocene. Nevertheless, large parts of the southwestern and eastern Alps remained unglaciated or covered only by small valley glaciers during glacials. The impact of a climatic decline of such a dimension on fluvially dominated catchments is not ...
Isotope, aerosol, and methane records document an abrupt cooling event across the Northern Hemisphere at 8.2 kiloyears before present (kyr), while separate geologic lines of evidence document the catastrophic drainage of the glacial Lakes Agassiz and Ojibway into the Hudson Bay at approximately the same time. This melt water pulse may have been the ...
Sedimentary time series of color reflectance and major element chemistry from the anoxic Cariaco Basin off the coast of northern Venezuela record large and abrupt shifts in the hydrologic cycle of the tropical Atlantic during the past 90,000 years. Marine productivity maxima and increased precipitation and riverine discharge from northern South America are closely linked to ...
The late Quaternary Levant paleohydrology and paleoclimate were recorded in the sedimentary and level history of lakes that occupied the tectonic depressions along the Dead Sea rift. The region was characterized by cold - wet climate conditions during glacials and warm-dry conditions during interglacials. This pattern was punctuated by ...
The climate of the last glacial period was extremely variable, characterized by abrupt warming events in the Northern Hemisphere, accompanied by slower temperature changes in Antarctica and variations of global sea level. It is generally accepted that this millennial-scale climate variability was caused by ...
Detailed studies of profiles of delta/sup 18/O in oceanic and glacial cores and of pollen deposits in bogs indicate that the terrestrial climatic system, consisting of the atmosphere, hydrosphere, lithosphere and biosphere, is capable of oscillations with amplitudes, such as that of the Melisey II stadial of northern France, approaching or equaling that of ...
Atmospheric CH4 concentrations have been shown to vary on nearly all timescales throughout the last million years. On glacial/interglacial timescales, CH4 values are low (~375 ppb) during glacial periods and high during interglacial periods (~700ppb). Within glacial periods, CH4 concentration records share a substantial amount of ...
Abrupt climatic oscillations around the North Atlantic have been identified recently in Greenland ice cores as well as in North Atlantic marine sediment cores. The good correlation between the {open_quote}Dansgaard Oeschger events{close_quote} in the ice and the {open_quote}Heinrich events{close_quote} in the ocean suggests climate, in ...
During glacial-interglacial cycles, atmospheric CO2 concentration varied by about 100 ppmv in amplitude. While testing mechanisms that had led to the low glacial CO2 level could be done in equilibrium model experiments, an ultimate goal is to explain CO2 changes in transient simulations through the complete glacial-interglacial cycle. ...
Focus has always been on the northern Atlantic to explain the abrupt climate variability observed during the last glacial period. This is because important sources of deep waters, as well as various sources of freshwater, exist around the North Atlantic and could perturb the thermohaline circulation. The observation that Antarctic ...
A numerical algorithm is applied to the Greenland Ice Sheet Project 2 (GISP2) dust record from Greenland to remove the abrupt changes in dust flux associated with the Dansgaard�Oeschger (D�O) oscillations of the last glacial period. The procedure is based on the assumption that the rapid changes in dust are associated with large-scale changes in ...
In an attempt to reconstruct the climate for the last 40 ka in central Japan, sediment cores from Lake Aoki, located close to the northern Japanese Alps, and Lake Yamanaka, at the northern foot of Mt. Fuji, were investigated for grain-size, diatoms, and total organic carbon (TOC) and total nitrogen (TN) contents. TOC flux and diatom abundance are closely positively correlated ...
... Appendix D - Observed temperature changes on each ... Doug Randall, An Abrupt Climate Change Scenario and ... to A Climate Changed World, (The ...
DTIC Science & Technology
Information about abrupt climate change research. From the site:"Most of the studies and debates on potential climate change have focused on the ongoing ... ...
The start of the Ediacaran period is defined by one of the most severe climate change events recorded in Earth history--the recovery from the Marinoan 'snowball' ice age, approximately 635 Myr ago (ref. 1). Marinoan glacial-marine deposits occur at equatorial palaeolatitudes, and are sharply overlain by a thin interval of carbonate that preserves marine ...
Since its discovery in Greenland ice cores, the millennial scale climatic variability of the last glacial period has been increasingly documented at all latitudes with studies focusing mainly on Marine Isotopic Stage 3 (MIS 3; 28-60 thousand of years before present, hereafter ka) and characterized by short Dansgaard-Oeschger (DO) events. Recent and new ...
Tropical montane biome migration patterns in the northern Andes are found to be coupled to glacial-induced mean annual temperature (MAT) changes; however, the accuracy and resolution of current records are insufficient to fully explore their magnitude and rates of change. Here we present a ~60-year resolution pollen record over the past 284 000 years from Lake F�quene (5� ...
Contrary to the intensively investigated North Atlantic marine and ice cores, and "classical" loess records in the Western and Central Europe, our knowledge about the last glacial climate and environmental dynamics of Southeastern Europe is still poorly known. Recent research advances in this region have established thick loess deposits in the region as ...
Cooling around the North Atlantic associated with ice-age millennial oscillations was primarily a wintertime phenomenon, enforced and amplified by sea-ice formation. As summarized by Denton et al. (submitted, QSR), Greenland ice-core indicators of mean-annual temperature change show the Younger Dryas much colder than the Little Ice Age and almost as cold as the glacial ...
Rather than being a seamless transition from Late Glacial Maximum to the start of the Holocene between 15,000 and 8000 years ago, the warming during this period was punctuated by abrupt climatic instabilities. These include the Younger Dryas cold event, the Preboreal Oscillation, and an isolated cooling event around 8200 years ago (see ...
Earth�s glacial climate has been punctuated with warm interglacial periods lasting ~10,000 years. Current anthropogenic greenhouse gas forcing is pushing climate towards a state that deviates from established Quaternary patterns. In predicting future rapid climate changes, two key analogs are the end of the last ...
The Titel loess plateau (Vojvodina, Serbia) is situated at the confluence of the rivers Danube and Tisa, in the southeastern part of the Ba?ka subregion. Various phases of fluvial erosion have shaped the ellipsoid form of the plateau, which is characterized by steep slopes on the margins. The Titel loess plateau is a unique geomorphologic feature, further emphasising the wide diversity of the ...
Valley morphology and sediment in the Fort McMurray region of Alberta indicate that a catastrophic flood discharged down the lower Clearwater and Athabasca river valleys 9900 yr B.P. Geomorphic and chronologic evidence suggests that glacial Lake Agassiz (Emerson phase) was the probable water source. As the flood incised a drainage divide located near the Alberta-Saskatchewan ...
We conducted the first synchronously coupled atmosphere-ocean general circulation model simulation from the Last Glacial Maximum to the Boelling-Alleroed (BA) warming. Our model reproduces several major features of the deglacial climate evolution, suggesting a good agreement in climate sensitivity between the model and observations. In ...
New insight into the mechanisms that caused Earth's glacial periods to abruptly end could come from opal accumulations in sediment cores. Previous studies have shown that the most recent glacial period ended when the Southern Hemisphere's westerly winds intensified and shifted southward; this change in the winds led to increased ...
... in dating samples. Consequently, the configuration of LGM ice sheets, pattern of subsequent deglaciation, and environmental changes are ... Glacial Maximum (LGM) configuration of the Antarctic Peninsula i...
The Last Glacial Termination (20,000-10,000 years ago) was anything else but a smooth climate transition. It is through different paleo-climate proxies that we see the deglacial waxing and waning of regional temperature and precipitation on millennial and orbital timescales. Understanding the effects of melting ice-sheets, changing ...
The magnitude of atmospheric cooling during the Last Glacial Maximum and the timing of the transition into the current interglacial period remain poorly constrained in tropical regions, partly because of a lack of suitable climate records. Glacial moraines provide a method of reconstructing past temperatures, but they are relatively ...
The abrupt shifts in last glacial climate at high latitudes in the Northern Hemisphere have been well documented. Recent studies show that substantial and possibly global climate oscillations have occurred during the Holocene with pacing similar to the glacial events. However, by comparison, ...
A glacial terminal moraine forms when: a. the climate is getting colder. b. the climate is getting warmer. c. the climate is stable.
Models and palaeoclimate data suggest that the tropical Pacific climate system plays a key part in the mechanisms underlying orbital-scale and abrupt climate change. Atmospheric convection over the western tropical Pacific is a major source of heat and moisture to extratropical regions, and may therefore influence the global ...
The last glacial period was punctuated by rapid climate shifts, known as Dansgaard-Oeschger events, with strong imprint in the North Atlantic sector suggesting that they were linked with the Atlantic Meridional Overturning Circulation. Here an idealized single-hemisphere three-dimensional ocean-atmosphere-sea ice coupled model is used to explore the ...
The Younger Dryas cold period, which interrupted the transition from the last ice age to modern conditions in Greenland, is one of the most dramatic incidents of abrupt climate change reconstructed from paleoclimate proxy records. Changes in the Atlantic Ocean overturning circulation in response to freshwater fluxes from melting ice are frequently invoked ...
A quantitative measure of the rate at which fossil-pollen abundances changed over the last 18000 years at 18 sites spread across eastern North America distinguishes local from regionally synchronous changes. Abrupt regional changes occurred at most sites in late-glacial time (at {approx}13700, {approx}12300, and {approx}10000 radiocarbon yr BP) and during ...
Paleoproxy studies show a strong correlation between tropical climate and high-latitude temperature variability recorded in the Greenland ice cores over the last glacial cycle. In particular, abrupt cooling events in the Greenland Ice Sheet Project II ?18O ice record appear synchronous with a southward migration of the Intertropical ...
Analyses of marine [delta][sup 18]O records suggest that the variations of the Earth's orbital parameters have induced and provided the timing of the Pleistocene climatic oscillations. This dissertation analyses some statistical properties of the Pleistocene climate by estimating the Probability Density Function (PDF) of the [delta][sup 18]O ...
Abrupt climate change events come in a variety of temporal and spatial scales ranging from the massive events of the last glacial period to the more subtle versions of the Holocene. The impact of even relatively subtle Holocene abrupt climate change events can be extremely dramatic leading to ...
Determining the mechanisms that caused past abrupt climate changes is important for understanding today�s rapidly warming climate and, in particular, whether we may be faced with abrupt climate change in the future. Scientists, policy makers and the public are concerned about ongoing warming ...
We construct an 800-kyr synthetic record of Greenland climate variability based on the thermal bipolar seesaw model. Our Greenland analog reproduces much of the variability seen in the Greenland ice cores over the last 100 kyr. We also find a strong similarity with the absolutely dated speleothem record from China, allowing us to place ice-core records within an absolute time ...
The stability of the thermohaline circulation of modern and glacial climates is compared with the help of a two dimensional ocean�atmosphere�sea ice coupled model. It turns out to be more unstable as less freshwater forcing is required to induce a polar halocline catastrophy in glacial climates. The large ...
We present a high-resolution and independently dated multiproxylake sediment record from the paleolake at Les �chetsin southeastern France that displays synchronous changes inindependent limnic and terrestrial ecosystem proxies, in concertwith millennial-scale climate oscillations during the last glacialperiod. Distinct lake-level fluctuations, low lake organic ...
Reconstructions of ancient atmospheric carbon dioxide (CO2) variations help us better understand how the global carbon cycle and climate are linked. We compared CO2 variations on millennial time scales between 20,000 and 90,000 years ago with an Antarctic temperature proxy and records of abrupt climate change in the Northern ...
Temperature reconstructions from the North Atlantic region indicate frequent abrupt and severe climate fluctuations during the last glacial and Holocene periods. The driving forces for these events are unclear and coupled atmosphere-ocean models of global circulation have only simulated such events by inserting large amounts of fresh ...
We used 5704 14C, 10Be, and 3He ages that span the interval from 10,000 to 50,000 years ago (10 to 50 ka) to constrain the timing of the Last Glacial Maximum (LGM) in terms of global ice-sheet and mountain-glacier extent. Growth of the ice sheets to their maximum positions occurred between 33.0 and 26.5 ka in response to climate forcing from decreases in ...
... Title : Two Degrees of Separation: Abrupt Climate Change and the Adverse Impact to US National Security. Descriptive Note : Research paper. ...
Economic and ecological impacts of abrupt climate change This publication is not available online. Please contact a FORT author (see sidebar to right) o...
Today, carrying capacity, which is the ability for the Earth and its natural ... Abrupt climate change is likely to stretch carrying capacity well beyond its already ...
Abrupt Climate Change: Looking at Ocean Currents. A new report supports the hypothesis that heat transfer by ocean currents, rather than global heating or ...
Imperatives for the Next Decade and Beyond Other Related Titles topleft topright Abrupt Climate Change: Inevitable Surprises (2002) Ocean Studies Board (OSB) Polar Research Board...
Science.gov Websites
Detailed investigations of high latitude sequences recently collected by the Ocean Drilling Program (ODP) indicate that periods of rapid climate change often culminated in brief transient climates, with more extreme conditions than subsequent long term climates. Two examples of such events have been identified in the Paleogene; the ...
One of the most important debates in paleoclimate research is the link between ocean circulation and climate change. On glacial-interglacial timescales, global climate is driven by Milankovich orbital cycles, though the resulting insolation variations are small and require amplifying mechanisms. Changes in the strength of global ...
It is generally accepted that, as postulated by the Milankovitch theory, the Earth's orbital variations play a fundamental role in driving glacial cycles. However, many aspects of glacial cycles, such as strongly-nonlinear response of the ice sheets to orbital forcing and the role of carbon-dioxide climate ice-sheet feedback, still ...
The West African monsoon is a complex dynamical system that depends on feedbacks between land surface, including vegetation, and the ocean. Modeling and existing paleoclimatic data suggest that the coupling between these system components makes it particularly susceptible to abrupt change. Characterization of each of these components is therefore crucial in understanding ...
Jul 23, 2011 ... In the early summer of 2011, the Medvezhiy Glacier in Tajikistan slid abruptly down its valley, creating a glacial lake.
Jul 30, 2011 ... In the early summer of 2011, the Medvezhiy Glacier in Tajikistan slid abruptly down its valley, creating a glacial lake.
There are observational data and numerical models suggesting that geothermal heating of ocean bottom waters may play an important role in the large-scale oceanic circulation. However, the role of abyssal geothermal heating in abrupt climate change has not been evaluated. Energy is continuously escaping the interior of Earth at a rate of 47 TW (1012 W), ...
It is widely accepted, based on data from the last few decades and on model simulations, that anthropogenic climate change will cause increased fire activity. However, less attention has been paid to the relationship between abrupt climate changes and heightened fire activity in the paleorecord. We use 35 charcoal and pollen records to ...
Loess deposits are widely distributed in the Northern Hemisphere, where they have recorded not only the glacial-interglacial cycles, but also millennial-timescale changes resembling those in marine and ice cores. Such abrupt variations are clearly marked in western European series, but have not yet been evidenced in the East of the continent. Here we ...
Loess deposits are widely distributed in the Northern Hemisphere, where they have recorded not only the glacial-interglacial cycles, but also millennial-timescale changes resembling those in marine and ice cores. Such abrupt variations are clearly marked in Western European series, but have not yet been evidenced in the east of the continent. Here we ...
Climate changes have been considered to be a triggering mechanism for large magmatic eruptions. However they can also trigger volcanic collapses, phenomena that cause the destruction of the entire sector of a volcano, including its summit. During the past 30 ka, major volcanic collapses occurred just after main glacial peaks that ended with a rapid ...
Abrupt Climate Change NOAA Abrupt Climate Change Climatic Extremes and Weather Events Global Warming and Hurricanes Atlantic Hurricanes and Climate (PDF, 2 pp., 484 kb, About...
Yosemite Valley - YOSEMITE Palisades Glacier - PALGLAC Glacier Movement - GLACIER1 Glacial Ice During Ice Age - GLACIAL The Earth's Climate System - CLIMSYS ...
Antarctic climate cooling and response of diatoms in glacial meltwater streams This publication is not available online. ... P.T. Doran, and K.D. Cozzetto. ...
How anthropogenic climate change will affect hydroclimate of the arid regions of SW North America over the next century is a concern. Model projections suggest permanent �dust bowl-like� conditions; however, any anthropogenic change will be superimposed on long-term natural climate variability. We use the paleoclimatic record from an 82-m deep ...
A leading hypothesis to explain abrupt climate change during the last glacial cycle calls on fluctuations in the margin of the North American Laurentide Ice Sheet (LIS), which may have routed freshwater between the Gulf of Mexico (GOM) and North Atlantic, affecting North Atlantic Deep Water (NADW) variability and regional ...
DOE Information Bridge
The Little Ice Age (LIA) is one of the most prominent climate shifts in the past 5000 yrs. It has been suggested that the LIA might be the most recent of the Dansgaard�Oeschger events, which are better known as abrupt, large scale climate oscillations during the last glacial period. If the case, then according to ...
The North Greenland Eemian Ice Drilling (NEEM) is an international ice core research project aimed at retrieving an ice core from North-West Greenland (77.45�N 51.06�W) reaching back through the previous interglacial period. After three field seasons of drilling, bedrock at NEEM was reached at a depth of 2537.36 meters on July 27, 2010. Drilling was halted with the deepest 2 meters of ice core ...
During the Last Glacial Termination from 18,000-8,000 cal. yrs B.P., meltwater routing of the Laurentide Ice Sheet (LIS) may have been linked to abrupt climatic events, such as the Younger Dryas. Previous studies show episodic meltwater input from the LIS, via the Mississippi River to the Gulf of Mexico (GOM) several thousand years ...
