气候变化领域集成服务门户(CCPortal): Southern Ocean carbon sink enhanced by sea-ice feedbacks at the Antarctic Cold Reversal

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DOI	10.1038/s41561-020-0587-0
	Southern Ocean carbon sink enhanced by sea-ice feedbacks at the Antarctic Cold Reversal
	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.
发表日期	2020
ISSN	17520894
起始页码	489
结束页码	497
卷号	13 期号:7
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.
英文关键词	atmospheric gas; biogeochemical cycle; carbon sink; climate modeling; ice core; remineralization; sea ice; seasonal variation; Southern Hemisphere; Southern Ocean
语种	英语
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206774
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, Univers...
推荐引用方式 GB/T 7714	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],2020,13(7).
APA	Fogwill C.J..,Turney C.S.M..,Menviel L..,Baker A..,Weber M.E..,...&Cooper A..(2020).Southern Ocean carbon sink enhanced by sea-ice feedbacks at the Antarctic Cold Reversal.Nature Geoscience,13(7).
MLA	Fogwill C.J.,et al."Southern Ocean carbon sink enhanced by sea-ice feedbacks at the Antarctic Cold Reversal".Nature Geoscience 13.7(2020).