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DOI | 10.1073/pnas.2005849117 |
Rapid reductions and millennial-scale variability in Nordic Seas sea ice cover during abrupt glacial climate changes | |
Henrik Sadatzki; Niccolò Maffezzoli; Trond M. Dokken; Margit H. Simon; Sarah M. P. Berben; Kirsten Fahl; Helle A. Kjær; Andrea Spolaor; Ruediger Stein; Paul Vallelonga; Bo M. Vinther; Eystein Jansen | |
2020-11-09 | |
发表期刊 | Proceedings of the National Academy of Science
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出版年 | 2020 |
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. |
领域 | 地球科学 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/304042 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | Henrik Sadatzki,Niccolò Maffezzoli,Trond M. Dokken,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 Science,2020. |
APA | Henrik Sadatzki.,Niccolò Maffezzoli.,Trond M. Dokken.,Margit H. Simon.,Sarah M. P. Berben.,...&Eystein Jansen.(2020).Rapid reductions and millennial-scale variability in Nordic Seas sea ice cover during abrupt glacial climate changes.Proceedings of the National Academy of Science. |
MLA | Henrik Sadatzki,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 Science (2020). |
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