Last glacial atmospheric CO(2)decline due to widespread Pacific deep-water expansion

doi:10.1038/s41561-020-0610-5

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	Last glacial atmospheric CO(2)decline due to widespread Pacific deep-water expansion
	Yu, J.1,2; Menviel, L.3; Jin, Z. D.2,4,5; Anderson, R. F.6; Jian, Z.7; Piotrowski, A. M.8; Ma, X.2; Rohling, E. J.1,9; Zhang, F.2,4; Marino, G.1,10; McManus, J. F.6
通讯作者	Yu, J.(jimin.yu@anu.edu.au)
	2020-07-20
发表期刊	NATURE GEOSCIENCE
ISSN	1752-0894
页码	18
摘要	Carbon-rich Pacific deep water extended into the South Atlantic some 38,000 to 28,000 years ago, potentially contributing to a reduction in atmospheric carbon dioxide and the onset of the Last Glacial Maximum, according to deep-water carbonate chemistry reconstructions. Ocean circulation critically affects the global climate and atmospheric carbon dioxide through redistribution of heat and carbon in the Earth system. Despite intensive research, the nature of past ocean circulation changes remains elusive. Here we present deep-water carbonate ion concentration reconstructions for widely distributed locations in the Atlantic Ocean, where low carbonate ion concentrations indicate carbon-rich waters. These data show a low-carbonate-ion water mass that extended northward up to about 20 degrees S in the South Atlantic at 3-4 km depth during the Last Glacial Maximum. In combination with radiocarbon ages, neodymium isotopes and carbon isotopes, we conclude that this low-carbonate-ion signal reflects a widespread expansion of carbon-rich Pacific deep waters into the South Atlantic, revealing a glacial deep Atlantic circulation scheme different than commonly considered. Comparison of high-resolution carbonate ion records from different water depths in the South Atlantic indicates that this Pacific deep-water expansion developed from approximately 38,000 to 28,000 years ago. We infer that its associated carbon sequestration may have contributed critically to the contemporaneous decline in atmospheric carbon dioxide, thereby helping to initiate the glacial maximum.
DOI	10.1038/s41561-020-0610-5
关键词[WOS]	EASTERN EQUATORIAL PACIFIC ; SOUTHERN-OCEAN ; NORTH-ATLANTIC ; OVERTURNING CIRCULATION ; CARBON ; CO2 ; SEA ; SEQUESTRATION ; STRATIFICATION ; TEMPERATURE
收录类别	SCI ; SCI
语种	英语
资助项目	ARC Discovery Projects[DP140101393] ; ARC Discovery Projects[DP190100894] ; ARC Future Fellowship[FT140100993] ; ARC Future Fellowship[FT180100606] ; ARC Discovery[DP180100048] ; NSFC[41991322] ; NSFC[41930864] ; Australian Laureate Fellowship[FL120100050] ; US-NSF ; 111 Project[BP0719030] ; University of Vigo ; [NSFC41676026]
WOS研究方向	Geology
项目资助者	ARC Discovery Projects ; ARC Future Fellowship ; ARC Discovery ; NSFC ; Australian Laureate Fellowship ; US-NSF ; 111 Project ; University of Vigo
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000550620700005
出版者	NATURE PUBLISHING GROUP
引用统计	被引频次：27[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/15093
专题	加速器质谱中心第四纪科学与全球变化卓越创新中心
通讯作者	Yu, J.
作者单位	1.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT, Australia 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Peoples R China 3.Univ New South Wales, Climate Change Res Ctr, Sydney, NSW, Australia 4.CAS Ctr Excellence Quaternary Sci & Global Change, Xian, Peoples R China 5.Qingdao Natl Lab Marine Sci & Technol, Open Studio Ocean Continental Climate & Environm, Qingdao, Peoples R China 6.Columbia Univ, Lamont Doherty Earth Observ, New York, NY USA 7.Tongji Univ, State Key Lab Marine Geol, Shanghai, Peoples R China 8.Univ Cambridge, Dept Earth Sci, Cambridge, England 9.Univ Southampton, Natl Oceanog Ctr, Ocean & Earth Sci, Southampton, Hants, England 10.Univ Vigo, Ctr Invest Marina, Palaeoclimatol Lab, GEOMA, Vigo, Spain
推荐引用方式 GB/T 7714	Yu, J.,Menviel, L.,Jin, Z. D.,et al. Last glacial atmospheric CO(2)decline due to widespread Pacific deep-water expansion[J]. NATURE GEOSCIENCE,2020:18.
APA	Yu, J..,Menviel, L..,Jin, Z. D..,Anderson, R. F..,Jian, Z..,...&McManus, J. F..(2020).Last glacial atmospheric CO(2)decline due to widespread Pacific deep-water expansion.NATURE GEOSCIENCE,18.
MLA	Yu, J.,et al."Last glacial atmospheric CO(2)decline due to widespread Pacific deep-water expansion".NATURE GEOSCIENCE (2020):18.