globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.epsl.2018.08.006
Scopus记录号: 2-s2.0-85051540538
论文题名:
Antarctic Intermediate Water penetration into the Northern Indian Ocean during the last deglaciation
作者: Yu Z.; Colin C.; Ma R.; Meynadier L.; Wan S.; Wu Q.; Kallel N.; Sepulcre S.; Dapoigny A.; Bassinot F.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 500
起始页码: 67
结束页码: 75
语种: 英语
英文关键词: AAIW ; atmospheric CO2 ; deglaciation ; Nd isotopic composition ; Northern Indian Ocean
Scopus关键词: Atmospheric chemistry ; Carbon dioxide ; Climate change ; Isotopes ; AAIW ; Antarctic intermediate waters ; Atmospheric carbon dioxide ; Deglaciations ; Nd isotopic compositions ; Neodymium isotopic composition ; Northern indian oceans ; Planktonic foraminifera ; Oceanography ; Antarctic Intermediate Water ; carbon dioxide ; isotopic composition ; last deglaciation ; neodymium isotope ; paleoceanography ; planktonic foraminifera ; reconstruction ; Indian Ocean ; Southern Ocean ; Foraminifera
英文摘要: The two-stage increase in atmospheric carbon dioxide (CO2), and the associated decrease in radiocarbon (14C) during the last deglaciation, are thought to have been linked to enhanced Southern Ocean upwelling and the rapid release of sequestered 14C-depleted CO2. Antarctic Intermediate Water (AAIW), originating from the Southern Ocean, reflects variations in the Southern Ocean and, crucially, mirrors the chemical signature of upwelling deep water. However, the penetration of AAIW into the Northern Indian Ocean and its relationship with deglacial climate changes have not been thoroughly elucidated to date. Here, we present the neodymium isotopic composition (εNd) of mixed planktonic foraminifera from core MD77-176 from an intermediate depth in the Northern Indian Ocean to reconstruct the past evolution of intermediate water during deglaciation. The εNd record in the Northern Indian Ocean displays two pulse-like shifts towards more radiogenic Southern Ocean values during the deglaciation, and these shifts coincide with excursions in Δ14C and εNd records in the Pacific and Atlantic Oceans. These results suggest invasion of AAIW into the Northern Hemisphere oceans associated with enhanced Southern Ocean ventilation during deglaciation. Our new εNd record strongly supports the close linkage of AAIW propagation and atmospheric CO2 rise through Southern Ocean ventilation during deglaciation. © 2018 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109684
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China; Laboratoire GEOsciences Paris-Sud (GEOPS), UMR 8148, CNRS-Université de Paris-Sud, Université Paris-Saclay, Bâtiment 504, Orsay Cedex, 91405, France; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266061, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao, 266071, China; Equipe de Géochimie et Cosmochimie, Institut de Physique du Globe de Paris-Sorbonne Paris Cité, UMR 7154, Université Paris Diderot, France; College of Oceanography, Hohai University, Nanjing, China; Université de Sfax, Faculté des Sciences, Laboratoire GEOGLOB, BP 802, Sfax, 3038, Tunisia; Laboratoire des Sciences du Climat et de l'Environnement, Domaine du CNRS, Gif-sur-Yvette, 91198, France

Recommended Citation:
Yu Z.,Colin C.,Ma R.,et al. Antarctic Intermediate Water penetration into the Northern Indian Ocean during the last deglaciation[J]. Earth and Planetary Science Letters,2018-01-01,500
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