ENHANCED ANTICYCLONIC CIRCULATION IN THE EASTERN NORTH-ATLANTIC DURING COLD INTERVALS OF THE LAST DEGLACIATION INFERRED FROM DEEP-SEA POLLEN RECORDS

Pollen analyses on two deep-sea records recovered in the eastern Atlan tic between lat 37 degrees and 4 degrees N show two coeval peaks in wi nd-transported terrestrial elements (pollen and spores), mainly from d ry, steppe-type formations, at 15 ka and at 10.3 ka, This may reflect the dominance of anticyclonic circulation during the cold phases of th e last deglaciation, responsible for strong winds leading to the advec tion of polar air masses equatorward. At lat 37 degrees N, the predomi nant influence of the westerlies was established after 9.3 ka.