globalchange  > 气候变化与战略
DOI: 10.1073/pnas.2005849117
论文题名:
Rapid reductions and millennial-scale variability in Nordic Seas sea ice cover during abrupt glacial climate changes
作者: Sadatzki H.; Maffezzoli N.; Dokken T.M.; Simon M.H.; Berben S.M.P.; Fahl K.; Kjær H.A.; Spolaor A.; Stein R.; Vallelonga P.; Vinther B.M.; Jansen E.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:47
起始页码: 29478
结束页码: 29486
语种: 英语
英文关键词: Abrupt climate change ; Dansgaard-Oeschger events ; Nordic Seas ; Sea ice
Scopus关键词: article ; climate change ; cold stress ; Greenland ; Norwegian Sea ; sea ice ; sediment ; thermodynamics ; warming
英文摘要: Constraining the past sea ice variability in the Nordic Seas is critical for a comprehensive understanding of the abrupt Dansgaard- Oeschger (D-O) climate changes during the last glacial. Here we present unprecedentedly detailed sea ice proxy evidence from two Norwegian Sea sediment cores and an East Greenland ice core to resolve and constrain sea ice variations during four D-O events between 32 and 41 ka. Our independent sea ice records consistently reveal a millennial-scale variability and threshold response between an extensive seasonal sea ice cover in the Nordic Seas during cold stadials and reduced seasonal sea ice conditions during warmer interstadials. They document substantial and rapid sea ice reductions that may have happened within 250 y or less, concomitant with reinvigoration of deep convection in the Nordic Seas and the abrupt warming transitions in Greenland. Our empirical evidence thus underpins the cardinal role of rapid sea ice decline and related feedbacks to trigger abrupt and large-amplitude climate change of the glacial D-O events. © 2020 National Academy of Sciences. 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/163362
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作者单位: Sadatzki, H., Department of Earth Science, University of Bergen, Bergen, 5007, Norway, Bjerknes Centre for Climate Research, Bergen, 5007, Norway, Marine Geology Section, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, 27568, Germany; Maffezzoli, N., Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Copenhagen, 2100, Denmark, Department of Environmental Sciences, Informatics and Statistics, Ca' Foscari University of Venice, Venice Mestre, 30170, Italy, Institute of Polar Science-National Research Council of Italy, Venezia-Mestre (VE), (I) 30172, Italy; Dokken, T.M., Bjerknes Centre for Climate Research, Bergen, 5007, Norway, Climate, Norwegian Research Centre AS (NORCE), Bergen, 5007, Norway; Simon, M.H., Bjerknes Centre for Climate Research, Bergen, 5007, Norway, Climate, Norwegian Research Centre AS (NORCE), Bergen, 5007, Norway; Berben, S.M.P., Department of Earth Science, University of Bergen, Bergen, 5007, Norway, Bjerknes Centre for Climate Research, Bergen, 5007, Norway; Fahl, K., Marine Geology Section, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, 27568, Germany; Kjær, H.A., Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Copenhagen, 2100, Denmark; Spolaor, A., Department of Environmental Sciences, Informatics and Statistics, Ca' Foscari University of Venice, Venice Mestre, 30170, Italy, Institute of Polar Science-National Research Council of Italy, Venezia-Mestre (VE), (I) 30172, Italy; Stein, R., Marine Geology Section, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, 27568, Germany, MARUM Center for Marine Environmental Sciences, Faculty of Geosciences, University of Bremen, Bremen, 28334, Germany; Vallelonga, P., Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Copenhagen, 2100, Denmark, Oceans Institute, University of Western Australia, Crawley, WA 6009, Australia; Vinther, B.M., Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Copenhagen, 2100, Denmark; Jansen, E., Department of Earth Science, University of Bergen, Bergen, 5007, Norway, Bjerknes Centre for Climate Research, Bergen, 5007, Norway, Climate, Norwegian Research Centre AS (NORCE), Bergen, 5007, Norway

Recommended Citation:
Sadatzki H.,Maffezzoli N.,Dokken T.M.,et al. Rapid reductions and millennial-scale variability in Nordic Seas sea ice cover during abrupt glacial climate changes[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(47)
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