The Bering Strait was flooded 10,000 years before the Last Glacial Maximum
The cyclic growth and decay of continental ice sheets can be reconstructed from the history of global sea level. Sea level is relatively well constrained for the Last Glacial Maximum (LGM, 26,500 to 19,000 y ago, 26.5 to 19 ka) and the ensuing deglaciation. However, sea-level estimates for the perio...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/356007 2024-04-28T07:56:37+00:00 The Bering Strait was flooded 10,000 years before the Last Glacial Maximum Farmer, Jesse R. Pico, Tamara Underwood, Ona M. Cleveland Stout, Rebecca Granger, Julie Cronin, Thomas M. Fripiat, François Martínez-García, Alfredo Haug, Gerald H. Sigman, Daniel M. 2023-01 1 full-text file(s): application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/356007 https://dipot.ulb.ac.be/dspace/bitstream/2013/356007/3/Farmer_et_al_2023.pdf en eng uri/info:doi/10.1073/pnas.2206742119 uri/info:pmid/36574665 uri/info:scp/85144804064 https://dipot.ulb.ac.be/dspace/bitstream/2013/356007/3/Farmer_et_al_2023.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/356007 1 full-text file(s): info:eu-repo/semantics/openAccess Proceedings of the National Academy of Sciences of the United States of America, 120 (1 Sciences exactes et naturelles Arctic Ocean Bering Strait foraminifera-bound N isotopes glacial isostatic adjustment sea level info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2023 ftunivbruxelles 2024-04-10T00:12:21Z The cyclic growth and decay of continental ice sheets can be reconstructed from the history of global sea level. Sea level is relatively well constrained for the Last Glacial Maximum (LGM, 26,500 to 19,000 y ago, 26.5 to 19 ka) and the ensuing deglaciation. However, sea-level estimates for the period of ice-sheet growth before the LGM vary by > 60 m, an uncertainty comparable to the sea-level equivalent of the contemporary Antarctic Ice Sheet. Here, we constrain sea level prior to the LGM by reconstructing the flooding history of the shallow Bering Strait since 46 ka. Using a geochemical proxy of Pacific nutrient input to the Arctic Ocean, we find that the Bering Strait was flooded from the beginning of our records at 46 ka until 35.7 - 2.4 + 3.3 ka. To match this flooding history, our sea-level model requires an ice history in which over 50% of the LGM’s global peak ice volume grew after 46 ka. This finding implies that global ice volume and climate were not linearly coupled during the last ice age, with implications for the controls on each. Moreover, our results shorten the time window between the opening of the Bering Land Bridge and the arrival of humans in the Americas. SCOPUS: ar.j info:eu-repo/semantics/published Article in Journal/Newspaper Antarc* Antarctic Arctic Arctic Ocean Bering Land Bridge Bering Strait Foraminifera* Ice Sheet DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Sciences exactes et naturelles Arctic Ocean Bering Strait foraminifera-bound N isotopes glacial isostatic adjustment sea level |
spellingShingle |
Sciences exactes et naturelles Arctic Ocean Bering Strait foraminifera-bound N isotopes glacial isostatic adjustment sea level Farmer, Jesse R. Pico, Tamara Underwood, Ona M. Cleveland Stout, Rebecca Granger, Julie Cronin, Thomas M. Fripiat, François Martínez-García, Alfredo Haug, Gerald H. Sigman, Daniel M. The Bering Strait was flooded 10,000 years before the Last Glacial Maximum |
topic_facet |
Sciences exactes et naturelles Arctic Ocean Bering Strait foraminifera-bound N isotopes glacial isostatic adjustment sea level |
description |
The cyclic growth and decay of continental ice sheets can be reconstructed from the history of global sea level. Sea level is relatively well constrained for the Last Glacial Maximum (LGM, 26,500 to 19,000 y ago, 26.5 to 19 ka) and the ensuing deglaciation. However, sea-level estimates for the period of ice-sheet growth before the LGM vary by > 60 m, an uncertainty comparable to the sea-level equivalent of the contemporary Antarctic Ice Sheet. Here, we constrain sea level prior to the LGM by reconstructing the flooding history of the shallow Bering Strait since 46 ka. Using a geochemical proxy of Pacific nutrient input to the Arctic Ocean, we find that the Bering Strait was flooded from the beginning of our records at 46 ka until 35.7 - 2.4 + 3.3 ka. To match this flooding history, our sea-level model requires an ice history in which over 50% of the LGM’s global peak ice volume grew after 46 ka. This finding implies that global ice volume and climate were not linearly coupled during the last ice age, with implications for the controls on each. Moreover, our results shorten the time window between the opening of the Bering Land Bridge and the arrival of humans in the Americas. SCOPUS: ar.j info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Farmer, Jesse R. Pico, Tamara Underwood, Ona M. Cleveland Stout, Rebecca Granger, Julie Cronin, Thomas M. Fripiat, François Martínez-García, Alfredo Haug, Gerald H. Sigman, Daniel M. |
author_facet |
Farmer, Jesse R. Pico, Tamara Underwood, Ona M. Cleveland Stout, Rebecca Granger, Julie Cronin, Thomas M. Fripiat, François Martínez-García, Alfredo Haug, Gerald H. Sigman, Daniel M. |
author_sort |
Farmer, Jesse R. |
title |
The Bering Strait was flooded 10,000 years before the Last Glacial Maximum |
title_short |
The Bering Strait was flooded 10,000 years before the Last Glacial Maximum |
title_full |
The Bering Strait was flooded 10,000 years before the Last Glacial Maximum |
title_fullStr |
The Bering Strait was flooded 10,000 years before the Last Glacial Maximum |
title_full_unstemmed |
The Bering Strait was flooded 10,000 years before the Last Glacial Maximum |
title_sort |
bering strait was flooded 10,000 years before the last glacial maximum |
publishDate |
2023 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/356007 https://dipot.ulb.ac.be/dspace/bitstream/2013/356007/3/Farmer_et_al_2023.pdf |
genre |
Antarc* Antarctic Arctic Arctic Ocean Bering Land Bridge Bering Strait Foraminifera* Ice Sheet |
genre_facet |
Antarc* Antarctic Arctic Arctic Ocean Bering Land Bridge Bering Strait Foraminifera* Ice Sheet |
op_source |
Proceedings of the National Academy of Sciences of the United States of America, 120 (1 |
op_relation |
uri/info:doi/10.1073/pnas.2206742119 uri/info:pmid/36574665 uri/info:scp/85144804064 https://dipot.ulb.ac.be/dspace/bitstream/2013/356007/3/Farmer_et_al_2023.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/356007 |
op_rights |
1 full-text file(s): info:eu-repo/semantics/openAccess |
_version_ |
1797584063815483392 |