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

doi:10.1038/s41561-020-0610-5

	Last glacial atmospheric CO(2)decline due to widespread Pacific deep-water expansion
	Yu, J.2,3; Menviel, L.1; Jin, Z. D.2,6,10; Anderson, R. F.8; Jian, Z.7; Piotrowski, A. M.9; Ma, X.2; Rohling, E. J.3,5; Zhang, F.2,10; Marino, G.3,4
刊名	NATURE GEOSCIENCE
	2020-07-20
页码	18
ISSN号	1752-0894
DOI	10.1038/s41561-020-0610-5
通讯作者	Yu, J.(jimin.yu@anu.edu.au)
英文摘要	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.
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关键词	EASTERN EQUATORIAL PACIFIC ; SOUTHERN-OCEAN ; NORTH-ATLANTIC ; OVERTURNING CIRCULATION ; CARBON ; CO2 ; SEA ; SEQUESTRATION ; STRATIFICATION ; TEMPERATURE
WOS研究方向	Geology
语种	英语
出版者	NATURE PUBLISHING GROUP
WOS记录号	WOS:000550620700005
资助机构	ARC Discovery Projects ; ARC Future Fellowship ; ARC Discovery ; NSFC ; Australian Laureate Fellowship ; US-NSF ; 111 Project ; University of Vigo
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/15092]
专题	地球环境研究所_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.Univ New South Wales, Climate Change Res Ctr, Sydney, NSW, Australia 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Peoples R China 3.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT, Australia 4.Univ Vigo, Ctr Invest Marina, Palaeoclimatol Lab, GEOMA, Vigo, Spain 5.Univ Southampton, Natl Oceanog Ctr, Ocean & Earth Sci, Southampton, Hants, England 6.Qingdao Natl Lab Marine Sci & Technol, Open Studio Ocean Continental Climate & Environm, Qingdao, Peoples R China 7.Tongji Univ, State Key Lab Marine Geol, Shanghai, Peoples R China 8.Columbia Univ, Lamont Doherty Earth Observ, New York, NY USA 9.Univ Cambridge, Dept Earth Sci, Cambridge, England 10.CAS Ctr Excellence Quaternary Sci & Global Change, Xian, Peoples R China
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.