ArticleProceedings of the National Academy of Sciences of the United States of America2020
Rapid reductions and millennial-scale variability in Nordic Seas sea ice cover during abrupt glacial climate changes.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed.
- The Greenland spatial fingerprint of Dansgaard-Oeschger events in observations and models.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- Sea ice-ocean coupling during Heinrich Stadials in the Atlantic-Arctic gateway.Scientific reports · 2024Article
- Sea ice fluctuations in the Baffin Bay and the Labrador Sea during glacial abrupt climate changes.Proceedings of the National Academy of Sciences of the United States of America · 2022Article
- Climate changes modulated the history of Arctic iodine during the Last Glacial Cycle.Nature communications · 2022Article
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12 authors.
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Abstract
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.
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