globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2657
论文题名:
Sequestration of carbon in the deep Atlantic during the last glaciation
作者: Yu J.; Menviel L.; Jin Z.D.; Thornalley D.J.R.; Barker S.; Marino G.; Rohling E.J.; Cai Y.; Zhang F.; Wang X.; Dai Y.; Chen P.; Broecker W.S.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2016
卷: 9, 期:4
起始页码: 319
结束页码: 324
语种: 英语
Scopus关键词: benthic foraminifera ; carbon dioxide ; carbon sequestration ; climate modeling ; last glaciation ; oceanic circulation ; paleoceanography ; paleoclimate ; paleoenvironment ; proxy climate record ; reconstruction ; Atlantic Ocean ; Foraminifera
英文摘要: 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 μmol kg-1 between ∼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. © 2016 Macmillan Publishers Limited. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106037
Appears in Collections:气候减缓与适应
科学计划与规划

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作者单位: Research School of Earth Sciences, Australian National University, Canberra, ACT, Australia; Climate Change Research Centre, University of New South WalesNSW, Australia; ARC Centre of Excellence for Climate SystemNSW, Australia; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China; Department of Geography, University College London, London, United Kingdom; School of Earth and Ocean Sciences, Cardiff University, Cardiff, United Kingdom; Ocean and Earth Science, University of Southampton, National Oceanography Centre, Southampton, United Kingdom; Earth Observatory of Singapore, Nanyang Technological University, 50 Nanyang Avenue, Singapore; School of Geographic Sciences, East China Normal University, Shanghai, China; Lamont-Doherty Earth Observatory, Columbia University, 61 Route 9W/PO Box 1000, Palisades, NY, United States

Recommended Citation:
Yu J.,Menviel L.,Jin Z.D.,et al. Sequestration of carbon in the deep Atlantic during the last glaciation[J]. Nature Geoscience,2016-01-01,9(4)
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