FN Archimer Export Format
PT J
TI Changes in productivity and intermediate circulation in the northern Indian Ocean since the last deglaciation: new insights from benthic foraminiferal Cd ∕ Ca records and benthic assemblage analyses
BT 
AF Ma, Ruifang
   Sépulcre, Sophie
   Licari, Laetitia
   Haurine, Frédéric
   Bassinot, Franck
   Yu, Zhaojie
   Colin, Christophe
AS 1:1,2;2:1;3:3;4:1;5:5;6:5;7:1;
FF 1:;2:;3:;4:;5:;6:;7:;
C1 GEOPS, Université Paris-Saclay, CNRS, Orsay, 91405, France
   State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China
   CEREGE, Aix-Marseille Université-Europole de l'Arbois-BP80, Aix-en-Provence, 13545, France
   LSCE/IPSL, CEA CNRS UVSQ, Gif Sur Yvette, F-91190, France
   Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
C2 UNIV PARIS SACLAY, FRANCE
   CHINESE ACAD SCI, CHINA
   CEREGE, FRANCE
   LSCE, FRANCE
   CHINESE ACAD SCI, CHINA
IN DOAJ
IF 4.3
TC 1
UR https://archimer.ifremer.fr/doc/00659/77152/78525.pdf
   https://archimer.ifremer.fr/doc/00659/77152/78526.zip
   https://archimer.ifremer.fr/doc/00659/77152/95699.pdf
   https://archimer.ifremer.fr/doc/00659/77152/95700.zip
LA English
DT Article
CR OSIRIS 3 - MD 13
BO Marion Dufresne
AB We have measured Cd / Ca ratios of several benthic foraminiferal species and studied benthic foraminiferal assemblages on two cores from the northern Indian Ocean (Arabian Sea and northern Bay of Bengal, BoB), in order to reconstruct variations in intermediate water circulation and paleo-nutrient content since the last deglaciation. Intermediate water Cdw records estimated from the benthic Cd / Ca reflect past changes in surface productivity and/or intermediate-bottom water ventilation. The benthic foraminiferal assemblages are consistent with the geochemical data. These results suggest that during the last deglaciation, the Heinrich Stadial 1 and Younger Dryas (HS1 and YD, respectively) millennial-scale events were marked by a decrease in Cdw values, indicating an enhanced ventilation of intermediate-bottom water masses. Benthic foraminifer assemblages indicate that surface primary productivity was low during the early Holocene (from 10 to 6 cal kyr BP), resulting in low intermediate water Cdw at both sites. From ~ 5.2 to 2.4 cal kyr BP, the benthic foraminiferal assemblages indicate meso- to eutrophic intermediate water conditions, which correspond to high surface productivity. This is consistent with a significant increase in the intermediate water Cdw in the southeastern Arabian Sea and the northeastern BoB. The comparison of intermediate water Cdw records with previous reconstructions of past Indian monsoon evolution during the Holocene suggests a direct control of intermediate water Cdw by monsoon-induced changes in upper water stratification and surface primary productivity. 
PY 2022
PD AUG
SO Climate Of The Past
SN 1814-9324
PU Copernicus GmbH
VL 18
IS 8
UT 000835280100001
BP 1757
EP 1774
DI 10.5194/cp-18-1757-2022
ID 77152
ER

EF