between CCN and the aerosol index AI, defined as the10 product of AOT and the �Angstrom exponent, thus. A., Elleman, R., Ferrare, R. A., Turner, D., Flynn, C., Wang, J., Ogren, J., Hudson, J., Jonsson, H the 1st ACE-2 La-5 grangian experiment, Tellus, 52B, 348�374, 2000. Kahn, R. A., Garay, M. J., Nelson, D