Labrador Sea freshening at 8.5 ka BP caused by Hudson Bay Ice Saddle collapse
A significant reduction in the Atlantic Meridional Overturning Circulation and rapid northern Hemisphere cooling 8200 years ago have been linked to the final melting of the Laurentide Ice Sheet. Although many studies associated this cold event with the drainage of Lake Agassiz-Ojibway, recent model...
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ftpubman:oai:pure.mpg.de:item_3027757 2023-08-20T04:06:54+02:00 Labrador Sea freshening at 8.5 ka BP caused by Hudson Bay Ice Saddle collapse Lochte, A. Repschläger, J. Kienast, M. Garbe-Schoenberg, D. Andersen, N. Hamann, C. Schneider, R. 2019 http://hdl.handle.net/21.11116/0000-0003-0379-2 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1038/s41467-019-08408-6 http://hdl.handle.net/21.11116/0000-0003-0379-2 Nature Communications info:eu-repo/semantics/article 2019 ftpubman https://doi.org/10.1038/s41467-019-08408-6 2023-08-01T23:48:53Z A significant reduction in the Atlantic Meridional Overturning Circulation and rapid northern Hemisphere cooling 8200 years ago have been linked to the final melting of the Laurentide Ice Sheet. Although many studies associated this cold event with the drainage of Lake Agassiz-Ojibway, recent model simulations have shown that the Hudson Bay Ice Saddle collapse would have had much larger effects on the Atlantic Meridional Overturning Circulation than the lake outburst itself. Based on a combination of Mg/Ca and oxygen isotope ratios of benthic foraminifera, this study presents the first direct evidence of a major Labrador shelfwater freshening at 8.5 ka BP, which we associate with the Hudson Bay Ice Saddle collapse. The freshening is preceded by a subsurface warming of the western Labrador Sea, which we link to the strengthening of the West Greenland Current that could concurrently have accelerated the ice saddle collapse in Hudson Bay. Article in Journal/Newspaper Greenland Hudson Bay Ice Sheet Labrador Sea Max Planck Society: MPG.PuRe Greenland Hudson Hudson Bay Nature Communications 10 1 |
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Max Planck Society: MPG.PuRe |
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ftpubman |
language |
English |
description |
A significant reduction in the Atlantic Meridional Overturning Circulation and rapid northern Hemisphere cooling 8200 years ago have been linked to the final melting of the Laurentide Ice Sheet. Although many studies associated this cold event with the drainage of Lake Agassiz-Ojibway, recent model simulations have shown that the Hudson Bay Ice Saddle collapse would have had much larger effects on the Atlantic Meridional Overturning Circulation than the lake outburst itself. Based on a combination of Mg/Ca and oxygen isotope ratios of benthic foraminifera, this study presents the first direct evidence of a major Labrador shelfwater freshening at 8.5 ka BP, which we associate with the Hudson Bay Ice Saddle collapse. The freshening is preceded by a subsurface warming of the western Labrador Sea, which we link to the strengthening of the West Greenland Current that could concurrently have accelerated the ice saddle collapse in Hudson Bay. |
format |
Article in Journal/Newspaper |
author |
Lochte, A. Repschläger, J. Kienast, M. Garbe-Schoenberg, D. Andersen, N. Hamann, C. Schneider, R. |
spellingShingle |
Lochte, A. Repschläger, J. Kienast, M. Garbe-Schoenberg, D. Andersen, N. Hamann, C. Schneider, R. Labrador Sea freshening at 8.5 ka BP caused by Hudson Bay Ice Saddle collapse |
author_facet |
Lochte, A. Repschläger, J. Kienast, M. Garbe-Schoenberg, D. Andersen, N. Hamann, C. Schneider, R. |
author_sort |
Lochte, A. |
title |
Labrador Sea freshening at 8.5 ka BP caused by Hudson Bay Ice Saddle collapse |
title_short |
Labrador Sea freshening at 8.5 ka BP caused by Hudson Bay Ice Saddle collapse |
title_full |
Labrador Sea freshening at 8.5 ka BP caused by Hudson Bay Ice Saddle collapse |
title_fullStr |
Labrador Sea freshening at 8.5 ka BP caused by Hudson Bay Ice Saddle collapse |
title_full_unstemmed |
Labrador Sea freshening at 8.5 ka BP caused by Hudson Bay Ice Saddle collapse |
title_sort |
labrador sea freshening at 8.5 ka bp caused by hudson bay ice saddle collapse |
publishDate |
2019 |
url |
http://hdl.handle.net/21.11116/0000-0003-0379-2 |
geographic |
Greenland Hudson Hudson Bay |
geographic_facet |
Greenland Hudson Hudson Bay |
genre |
Greenland Hudson Bay Ice Sheet Labrador Sea |
genre_facet |
Greenland Hudson Bay Ice Sheet Labrador Sea |
op_source |
Nature Communications |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s41467-019-08408-6 http://hdl.handle.net/21.11116/0000-0003-0379-2 |
op_doi |
https://doi.org/10.1038/s41467-019-08408-6 |
container_title |
Nature Communications |
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10 |
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1 |
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1774718273967882240 |