Abstract
14C ages determined by accelerator mass spectrometry for small monospecific samples of foraminifera (2000 shells = 1 mg carbon) in two deep sea cores from the North Atlantic are used, together with a paleoclimatic study, to determine the rate of climatic changes in the North Atlantic during the last Deglaciation. The maximum rate of warming has been 4° C century about 12500 years ago off Portugal and the mean rate of retreat of the polar front from 40 ° to 55 ° N was greater than 2 km year during 1000 years.
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