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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
Source PublicationNATURE GEOSCIENCE
Volume9Issue:4Pages:319-+
SubtypeArticle
AbstractAtmospheric 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 HeadingsScience & Technology ; Physical Sciences
DOI10.1038/NGEO2657
WOS KeywordOCEAN CIRCULATION ; ATMOSPHERIC CO2 ; LATE QUATERNARY ; EQUATORIAL PACIFIC ; INTERGLACIAL CYCLE ; WATER COMPOSITION ; SOUTHERN-OCEAN ; B/CA RATIOS ; ICE VOLUME ; BOTTOM
Indexed BySCI
Language英语
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000373374100019
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5755
Collection加速器质谱中心
Affiliation1.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
Recommended Citation
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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