FN Archimer Export Format PT J TI Dinocyst assemblage constraints on oceanographic and atmospheric processes in the eastern equatorial Atlantic over the last 44 kyr BT AF HARDY, William PENAUD, Aurelie MARRET, Fabienne BAYON, Germain MARSSET, Tania DROZ, Laurence AS 1:1;2:1;3:2;4:3;5:3;6:1; FF 1:;2:;3:;4:PDG-REM-GM-LGS;5:PDG-REM-GM-LGS;6:; C1 IUEM UBO, UMR Domaines Ocean 6538, F-29280 Plouzane, France. Univ Liverpool, Sch Environm Sci, Liverpool L69 7ZT, Merseyside, England. IFREMER, UR Geosci Marines, BP 70, F-29280 Plouzane, France. C2 UBO, FRANCE UNIV LIVERPOOL, UK IFREMER, FRANCE SI BREST SE PDG-REM-GM-LGS UM LGO IN WOS Ifremer jusqu'en 2018 DOAJ copubli-france copubli-europe copubli-univ-france IF 3.851 TC 12 UR https://archimer.ifremer.fr/doc/00349/46006/45675.pdf https://archimer.ifremer.fr/doc/00349/46006/45676.pdf https://archimer.ifremer.fr/doc/00349/46006/45677.csv LA English DT Article CR REPREZAI_LEG2 ZAIANGO1 BO Le Suroît L'Atalante AB A new 44 kyr long record of dinoflagellate (phytoplanktonic organisms) cysts (dinocysts) is presented from a marine sediment core collected on the Congolese margin with the aim of reconstructing past hydrological changes in the equatorial eastern Atlantic Ocean since Marine Isotopic Stage (MIS) 3. Our high-resolution dinocyst record indicates that significant temperature and moisture variations occurred across the glacial period, the last deglaciation and the Holocene. The use of specific dinocyst taxa, indicative of fluvial, upwelling and Benguela Current past environments for instance, provides insights into the main forcing mechanisms controlling palaeohydrological changes on orbital timescales. In particular, we are able, for the last 44 kyr, to correlate fluvial-sensitive taxa to monsoonal mechanisms related to precession minima–obliquity maxima combinations. While upwelling mechanisms appear as the main drivers for dinoflagellate productivity during MIS 2, dissolved nutrient-enriched Congo River inputs to the ocean also played a significant role in promoting dinoflagellate productivity between approximately 15.5 and 5 ka BP. Finally, this high-resolution dinocyst study permits us to precisely investigate the suborbital timing of the last glacial–interglacial termination, including an atypical warm and wet oceanic LGM signature, northern high-latitude abrupt climate change impacts in the equatorial eastern Atlantic, as well as a two-step decrease in moisture conditions during the Holocene at around 7–6 and 4–3.5 ka BP. PY 2016 PD AUG SO Biogeosciences SN 1726-4170 PU Copernicus Gesellschaft Mbh VL 13 IS 16 UT 000383883500003 BP 4823 EP 4841 DI 10.5194/bg-13-4823-2016 ID 46006 ER EF