Sequestration of carbon in the deep Atlantic during the last glaciation

doi:10.1038/NGEO2657

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	Sequestration of carbon in the deep Atlantic during the last glaciation
	Yu, J.1; Menviel, L.2,3; Jin, Z. D.4; Thornalley, D. J. R.5; Barker, S.6; Marino, G.1; Rohling, E. J.1,7; Cai, Y.4; Zhang, F.4; Wang, X.8; Dai, Y.1; Chen, P.1,9; Broecker, W. S.10
	2016-04-01
发表期刊	NATURE GEOSCIENCE
卷号	9 期号:4 页码:319-+
文章类型	Article
摘要	Atmospheric CO2 concentrations declined markedly about 70,000 years ago, when the Earth's climate descended into the last glaciation. Much of the carbon removed from the atmosphere has been suspected to have entered the deep oceans, but evidence for increased carbon storage remains elusive. Here we use the B/Ca ratios of benthic foraminifera from several sites across the Atlantic Ocean to reconstruct changes in the carbonate ion concentration and hence the carbon inventory of the deep Atlantic across this transition. We find that deep Atlantic carbonate ion concentration declined by around 25 mu mol kg(-1) between similar to 80,000 and 65,000 years ago. This drop implies that the deep Atlantic carbon inventory increased by at least 50 Gt around the same time as the amount of atmospheric carbon dropped by about 60 Gt. From a comparison with proxy records of deep circulation and climate model simulations, we infer that the carbon sequestration coincided with a shoaling of the Atlantic meridional overturning circulation. We thus conclude that changes in the Atlantic Ocean circulation may have played an important role in reductions of atmospheric CO2 concentrations during the last glaciation, by increasing the carbon storage in the deep Atlantic.
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.1038/NGEO2657
关键词[WOS]	OCEAN CIRCULATION ; ATMOSPHERIC CO2 ; LATE QUATERNARY ; EQUATORIAL PACIFIC ; INTERGLACIAL CYCLE ; WATER COMPOSITION ; SOUTHERN-OCEAN ; B/CA RATIOS ; ICE VOLUME ; BOTTOM
收录类别	SCI
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000373374100019
引用统计	被引频次：59[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/361006/5755
专题	加速器质谱中心
作者单位	1.Australian Natl Univ, Res Sch Earth Sci, GPO Box 4, Canberra, ACT 2601, Australia 2.Univ New S Wales, Climate Change Res Ctr, Sydney, NSW 2052, Australia 3.ARC Ctr Excellence Climate Syst, Sydney, NSW 2052, Australia 4.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China 5.UCL, Dept Geog, Mortimer St, London WC1E 6BT, England 6.Cardiff Univ, Sch Earth & Ocean Sci, Cardiff CF10 3XQ, S Glam, Wales 7.Univ Southampton, Natl Oceanog Ctr, Ocean & Earth Sci, Southampton SO14 3ZH, Hants, England 8.Nanyang Technol Univ, Earth Observ Singapore, 50 Nanyang Ave, Singapore 639798, Singapore 9.E China Normal Univ, Sch Geog Sci, Shanghai 200241, Peoples R China 10.Columbia Univ, Lamont Doherty Earth Observ, 61 Route 9W POB 1000, Palisades, NY 10964 USA
推荐引用方式 GB/T 7714	Yu, J.,Menviel, L.,Jin, Z. D.,et al. Sequestration of carbon in the deep Atlantic during the last glaciation[J]. NATURE GEOSCIENCE,2016,9(4):319-+.
APA	Yu, J..,Menviel, L..,Jin, Z. D..,Thornalley, D. J. R..,Barker, S..,...&Broecker, W. S..(2016).Sequestration of carbon in the deep Atlantic during the last glaciation.NATURE GEOSCIENCE,9(4),319-+.
MLA	Yu, J.,et al."Sequestration of carbon in the deep Atlantic during the last glaciation".NATURE GEOSCIENCE 9.4(2016):319-+.

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