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

doi:10.5194/cp-18-1757-2022

IOCAS-IR > 海洋地质与环境重点实验室

	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
	Ma, Ruifang 1,2; Sepulcre, Sophie 1; Licari, Laetitia 3; Haurine, Frederic 1; Bassinot, Franck 4; Yu, Zhaojie 5; Colin, Christophe 1
	2022-08-03
发表期刊	CLIMATE OF THE PAST
ISSN	1814-9324
卷号	18 期号:8 页码:1757-1774
通讯作者	Ma, Ruifang([email protected])
摘要	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 Cd-w 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, Cd-w variability was primarily driven by changes in intermediate-water properties, indicating an enhanced ventilation of intermediate-bottom water masses during both Heinrich Stadial 1 and the Younger Dryas (HS1 and YD, respectively). During the Holocene, however, surface primary productivity appears to have influenced Cd-w more than intermediate water mass properties. This is evident during the early Holocene (from 10 to 6 cal ka) when benthic foraminiferal assemblages indicate that surface primary productivity was low, resulting in low intermediate-water Cd-w at both sites. Then, from similar to 5.2 to 2.4 cal ka, surface productivity increased markedly, causing a significant increase in the intermediate-water Cd-w in the southeastern Arabian Sea and the northeastern BoB. The comparison of intermediatewater Cdw records with previous reconstructions of past Indian monsoon evolution during the Holocene suggests a direct control of intermediate-water Cd-w by monsoon-induced changes in upper-water stratification and surface primary productivity.
DOI	10.5194/cp-18-1757-2022
收录类别	SCI
语种	英语
资助项目	French National Research Agency[ANR-11-IDEX-0004-17-EURE-0006]; CNRS
WOS研究方向	Geology ; Meteorology & Atmospheric Sciences
WOS类目	Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000835280100001
出版者	COPERNICUS GESELLSCHAFT MBH
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/179855
专题	海洋地质与环境重点实验室
通讯作者	Ma, Ruifang
作者单位	1.Univ Paris Saclay, CNRS, GEOPS, F-91405 Orsay, France 2.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China 3.Aix Marseille Univ, CEREGE, Europole Arbois BP80, F-13545 Aix En Provence, France 4.CEA CNRS UVSQ, LSCE IPSL, F-91190 Gif Sur Yvette, France 5.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Ma, Ruifang,Sepulcre, Sophie,Licari, Laetitia,et al. 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[J]. CLIMATE OF THE PAST,2022,18(8):1757-1774.
APA	Ma, Ruifang.,Sepulcre, Sophie.,Licari, Laetitia.,Haurine, Frederic.,Bassinot, Franck.,...&Colin, Christophe.(2022).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.CLIMATE OF THE PAST,18(8),1757-1774.
MLA	Ma, Ruifang,et al."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".CLIMATE OF THE PAST 18.8(2022):1757-1774.