气候变化领域集成服务门户(CCPortal): Rapid reductions and millennial-scale variability in Nordic Seas sea ice cover during abrupt glacial climate changes

CCPortal

DOI	10.1073/pnas.2005849117
	Rapid reductions and millennial-scale variability in Nordic Seas sea ice cover during abrupt glacial climate changes
	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.
发表日期	2020
ISSN	0027-8424
起始页码	29478
结束页码	29486
卷号	117 期号:47
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.
英文关键词	Abrupt climate change; Dansgaard-Oeschger events; Nordic Seas; Sea ice
语种	英语
scopus关键词	article; climate change; cold stress; Greenland; Norwegian Sea; sea ice; sediment; thermodynamics; warming
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158837
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 Cli...
推荐引用方式 GB/T 7714	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],2020,117(47).
APA	Sadatzki H..,Maffezzoli N..,Dokken T.M..,Simon M.H..,Berben S.M.P..,...&Jansen E..(2020).Rapid reductions and millennial-scale variability in Nordic Seas sea ice cover during abrupt glacial climate changes.Proceedings of the National Academy of Sciences of the United States of America,117(47).
MLA	Sadatzki H.,et al."Rapid reductions and millennial-scale variability in Nordic Seas sea ice cover during abrupt glacial climate changes".Proceedings of the National Academy of Sciences of the United States of America 117.47(2020).