FN Archimer Export Format PT J TI Holocene Atlantic climate variations deduced from carbonate periplatform sediments (leeward margin, Great Bahama Bank) BT AF ROTH, S REIJMER, JJG AS 1:1;2:1; FF 1:;2:; C1 GEOMAR, Res Ctr Marine Geosci, Kiel, Germany. C2 GEOMAR, GERMANY IF 3.018 TC 37 UR https://archimer.ifremer.fr/doc/00229/33981/32331.pdf LA English DT Article CR IMAGES V LEG 1-MD114 IMAGES V LEG 4-MD114 BO Marion Dufresne DE ;Holocene climate;Great Bahama Bank;Atlantic circulation AB A marine sediment core from the leeward margin of Great Bahama Bank (GBB) was subjected to a multiproxy study. The aragonite dominated core MD992201 comprises the past 7230 years in a decadal time resolution and shows sedimentation rates of up to 13.8 m/kyr. Aragonite mass accumulation rates, age differences between planktonic foraminifera and aragonite sediments, and temperature distribution are used to deduce changes in aragonite production rates and paleocurrent strengths. Aragonite precipitation rates on GBB are controlled by exchange of carbonate ions and CO2 loss due to temperature-salinity conditions and biological activity, and these are dependent on the current strength. Paleocurrent strengths on GBB show high current velocities during the periods 6000 - 5100 years BP, 3500 - 2700 years BP, and 1600 - 700 years BP; lower current speeds existed during the time intervals 5100 - 3500 years BP, 2700 - 1600 years BP, and 700 - 100 years BP. Bahamian surface currents are directly linked to the North Atlantic atmospheric circulation, and thus periods with high ( low) current speeds are proposed to be phases of strong ( weak) atmospheric circulation. PY 2004 PD JAN SO Paleoceanography SN 0883-8305 PU Amer Geophysical Union VL 19 IS PA1003 UT 000188673700001 BP 1 EP 14 DI 10.1029/2003PA000885 ID 33981 ER EF