Sea level fingerprinting of the Bering Strait flooding history detects the source of the Younger Dryas climate event
During the Last Glacial Maximum, expansive continental ice sheets lowered globally averaged sea level ~130 m, exposing a land bridge at the Bering Strait. During the subsequent deglaciation, sea level rose rapidly and ultimately flooded the Bering Strait, linking the Arctic and Pacific Oceans. Obser...
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ftpubmed:oai:pubmedcentral.nih.gov:7043918 2023-05-15T15:04:31+02:00 Sea level fingerprinting of the Bering Strait flooding history detects the source of the Younger Dryas climate event Pico, T. Mitrovica, J. X. Mix, A. C. 2020-02-26 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7043918/ https://doi.org/10.1126/sciadv.aay2935 en eng American Association for the Advancement of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7043918/ http://dx.doi.org/10.1126/sciadv.aay2935 Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY). http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. CC-BY Research Articles Text 2020 ftpubmed https://doi.org/10.1126/sciadv.aay2935 2020-03-08T01:42:34Z During the Last Glacial Maximum, expansive continental ice sheets lowered globally averaged sea level ~130 m, exposing a land bridge at the Bering Strait. During the subsequent deglaciation, sea level rose rapidly and ultimately flooded the Bering Strait, linking the Arctic and Pacific Oceans. Observational records of the Bering Strait flooding have suggested two apparently contradictory scenarios for the timing of the reconnection. We reconcile these enigmatic datasets using gravitationally self-consistent sea-level simulations that vary the timing and geometry of ice retreat between the Laurentide and Cordilleran Ice Sheets to the southwest of the Bering Strait to fit observations of a two-phased flooding history. Assuming the datasets are robust, we demonstrate that their reconciliation requires a substantial melting of the Cordilleran and western Laurentide Ice Sheet from 13,000 to 11,500 years ago. This timing provides a freshwater source for the widely debated Younger Dryas cold episode (12,900 to 11,700 years ago). Text Arctic Bering Strait Ice Sheet PubMed Central (PMC) Arctic Bering Strait Pacific Science Advances 6 9 eaay2935 |
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Research Articles Pico, T. Mitrovica, J. X. Mix, A. C. Sea level fingerprinting of the Bering Strait flooding history detects the source of the Younger Dryas climate event |
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Research Articles |
description |
During the Last Glacial Maximum, expansive continental ice sheets lowered globally averaged sea level ~130 m, exposing a land bridge at the Bering Strait. During the subsequent deglaciation, sea level rose rapidly and ultimately flooded the Bering Strait, linking the Arctic and Pacific Oceans. Observational records of the Bering Strait flooding have suggested two apparently contradictory scenarios for the timing of the reconnection. We reconcile these enigmatic datasets using gravitationally self-consistent sea-level simulations that vary the timing and geometry of ice retreat between the Laurentide and Cordilleran Ice Sheets to the southwest of the Bering Strait to fit observations of a two-phased flooding history. Assuming the datasets are robust, we demonstrate that their reconciliation requires a substantial melting of the Cordilleran and western Laurentide Ice Sheet from 13,000 to 11,500 years ago. This timing provides a freshwater source for the widely debated Younger Dryas cold episode (12,900 to 11,700 years ago). |
format |
Text |
author |
Pico, T. Mitrovica, J. X. Mix, A. C. |
author_facet |
Pico, T. Mitrovica, J. X. Mix, A. C. |
author_sort |
Pico, T. |
title |
Sea level fingerprinting of the Bering Strait flooding history detects the source of the Younger Dryas climate event |
title_short |
Sea level fingerprinting of the Bering Strait flooding history detects the source of the Younger Dryas climate event |
title_full |
Sea level fingerprinting of the Bering Strait flooding history detects the source of the Younger Dryas climate event |
title_fullStr |
Sea level fingerprinting of the Bering Strait flooding history detects the source of the Younger Dryas climate event |
title_full_unstemmed |
Sea level fingerprinting of the Bering Strait flooding history detects the source of the Younger Dryas climate event |
title_sort |
sea level fingerprinting of the bering strait flooding history detects the source of the younger dryas climate event |
publisher |
American Association for the Advancement of Science |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7043918/ https://doi.org/10.1126/sciadv.aay2935 |
geographic |
Arctic Bering Strait Pacific |
geographic_facet |
Arctic Bering Strait Pacific |
genre |
Arctic Bering Strait Ice Sheet |
genre_facet |
Arctic Bering Strait Ice Sheet |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7043918/ http://dx.doi.org/10.1126/sciadv.aay2935 |
op_rights |
Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY). http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
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CC-BY |
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https://doi.org/10.1126/sciadv.aay2935 |
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Science Advances |
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6 |
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9 |
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