globalchange  > 气候变化与战略
DOI: 10.1038/s41561-020-0587-0
论文题名:
Southern Ocean carbon sink enhanced by sea-ice feedbacks at the Antarctic Cold Reversal
作者: Fogwill C.J.; Turney C.S.M.; Menviel L.; Baker A.; Weber M.E.; Ellis B.; Thomas Z.A.; Golledge N.R.; Etheridge D.; Rubino M.; Thornton D.P.; van Ommen T.D.; Moy A.D.; Curran M.A.J.; Davies S.; Bird M.I.; Munksgaard N.C.; Rootes C.M.; Millman H.; Vohra J.; Rivera A.; Mackintosh A.; Pike J.; Hall I.R.; Bagshaw E.A.; Rainsley E.; Bronk-Ramsey C.; Montenari M.; Cage A.G.; Harris M.R.P.; Jones R.; Power A.; Love J.; Young J.; Weyrich L.S.; Cooper A.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2020
卷: 13, 期:7
起始页码: 489
结束页码: 497
语种: 英语
英文关键词: atmospheric gas ; biogeochemical cycle ; carbon sink ; climate modeling ; ice core ; remineralization ; sea ice ; seasonal variation ; Southern Hemisphere ; Southern Ocean
英文摘要: The Southern Ocean occupies 14% of the Earth’s surface and plays a fundamental role in the global carbon cycle and climate. It provides a direct connection to the deep ocean carbon reservoir through biogeochemical processes that include surface primary productivity, remineralization at depth and the upwelling of carbon-rich water masses. However, the role of these different processes in modulating past and future air–sea carbon flux remains poorly understood. A key period in this regard is the Antarctic Cold Reversal (ACR, 14.6–12.7 kyr bp), when mid- to high-latitude Southern Hemisphere cooling coincided with a sustained plateau in the global deglacial increase in atmospheric CO2. Here we reconstruct high-latitude Southern Ocean surface productivity from marine-derived aerosols captured in a highly resolved horizontal ice core. Our multiproxy reconstruction reveals a sustained signal of enhanced marine productivity across the ACR. Transient climate modelling indicates this period coincided with maximum seasonal variability in sea-ice extent, implying that sea-ice biological feedbacks enhanced CO2 sequestration and created a substantial regional marine carbon sink, which contributed to the plateau in CO2 during the ACR. Our results highlight the role Antarctic sea ice plays in controlling global CO2, and demonstrate the need to incorporate such feedbacks into climate–carbon models. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169596
Appears in Collections:气候变化与战略

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作者单位: School of Geography, Geology and the Environment, Keele University, Keele, United Kingdom; Palaeontology, Geobiology and Earth Archives Research Centre, School of Biological, Earth and Environmental Sciences, UNSW Sydney, Sydney, NSW, Australia; ARC Centre of Excellence in Australian Biodiversity and Heritage, School of Biological, Earth and Environmental Sciences, UNSW Sydney, Sydney, NSW, Australia; Chronos 14Carbon-Cycle Facility, UNSW Sydney, Sydney, NSW, Australia; Climate Change Research Centre, School of Biological, Earth and Environmental Sciences, UNSW Sydney, Sydney, NSW, Australia; Department of Geochemistry and Petrology, Institute of Geoscinces, University of Bonn, Bonn, Germany; Research School of Earth Sciences, Australian National University, Canberra, ACT, Australia; Antarctic Research Centre, Victoria University of Wellington, Wellington, New Zealand; GNS Science, Lower Hutt, New Zealand; CSIRO Oceans and Atmosphere, Aspendale, VIC, Australia; Dipartimento di Matematica e Fisica, Università della Campania “Luigi Vanvitelli”, Caserta, Italy; Australian Antarctic Division, Department of Agriculture, Water and the Environment, Kingston, TAS, Australia; Antarctic Climate and Ecosystems Cooperative Research Centre, University of Tasmania, Hobart, TAS, Australia; Department of Geography, Swansea University, Swansea, United Kingdom; Centre for Tropical Environmental and Sustainability Science, College of ScienceTechnology and Engineering, James Cook University, Cairns, QLD, Australia; ARC Centre of Excellence in Australian Biodiversity and Heritage, James Cook University, Cairns, QLD, Australia; Research Institute for the Environment and Livelihoods, Charles Darwin University, Darwin, NT, Australia; Department of Geography, University of Sheffield, Sheffield, United Kingdom; Instituto de Conservación, Biodiversidad y Territorio, Universidad Austral de Chile, Valdivia, Chile; Departamento de Geografia, Universidad de Chile, Santiago, Chile; School of Earth, Atmosphere and Environment, Monash University, Melbourne, VIC, Australia; School of Earth and Ocean Sciences, Cardiff University, Cardiff, United Kingdom; Research Laboratory for Archaeology and the History of Art, University of Oxford, Oxford, United Kingdom; School of Geography, Exeter University, Exeter, United Kingdom; Bioeconomy Centre, Exeter University, Exeter, United Kingdom; Australian Centre for Ancient DNA, University of Adelaide, Adelaide, SA, Australia; South Australian Museum, Adelaide, SA, Australia

Recommended Citation:
Fogwill C.J.,Turney C.S.M.,Menviel L.,et al. Southern Ocean carbon sink enhanced by sea-ice feedbacks at the Antarctic Cold Reversal[J]. Nature Geoscience,2020-01-01,13(7)
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