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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ftpubmed:oai:pubmedcentral.nih.gov:6362222 2023-05-15T16:28:50+02:00 Labrador Sea freshening at 8.5 ka BP caused by Hudson Bay Ice Saddle collapse Lochte, Annalena Antonia Repschläger, Janne Kienast, Markus Garbe-Schönberg, Dieter Andersen, Nils Hamann, Christian Schneider, Ralph 2019-02-04 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6362222/ http://www.ncbi.nlm.nih.gov/pubmed/30718573 https://doi.org/10.1038/s41467-019-08408-6 en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6362222/ http://www.ncbi.nlm.nih.gov/pubmed/30718573 http://dx.doi.org/10.1038/s41467-019-08408-6 © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. CC-BY Article Text 2019 ftpubmed https://doi.org/10.1038/s41467-019-08408-6 2019-02-10T01:43:38Z 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. Text Greenland Hudson Bay Ice Sheet Labrador Sea PubMed Central (PMC) Greenland Hudson Hudson Bay Nature Communications 10 1 |
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Article Lochte, Annalena Antonia Repschläger, Janne Kienast, Markus Garbe-Schönberg, Dieter Andersen, Nils Hamann, Christian Schneider, Ralph Labrador Sea freshening at 8.5 ka BP caused by Hudson Bay Ice Saddle collapse |
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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 |
Text |
author |
Lochte, Annalena Antonia Repschläger, Janne Kienast, Markus Garbe-Schönberg, Dieter Andersen, Nils Hamann, Christian Schneider, Ralph |
author_facet |
Lochte, Annalena Antonia Repschläger, Janne Kienast, Markus Garbe-Schönberg, Dieter Andersen, Nils Hamann, Christian Schneider, Ralph |
author_sort |
Lochte, Annalena Antonia |
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 |
publisher |
Nature Publishing Group UK |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6362222/ http://www.ncbi.nlm.nih.gov/pubmed/30718573 https://doi.org/10.1038/s41467-019-08408-6 |
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_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6362222/ http://www.ncbi.nlm.nih.gov/pubmed/30718573 http://dx.doi.org/10.1038/s41467-019-08408-6 |
op_rights |
© The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41467-019-08408-6 |
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Nature Communications |
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10 |
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