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 si...
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ftoceanrep:oai:oceanrep.geomar.de:45772 2023-05-15T16:28:55+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 text https://oceanrep.geomar.de/id/eprint/45772/ https://oceanrep.geomar.de/id/eprint/45772/1/s41467-019-08408-6.pdf https://oceanrep.geomar.de/id/eprint/45772/2/41467_2019_8408_MOESM1_ESM.docx https://www.nature.com/articles/s41467-019-08408-6 https://doi.org/10.1038/s41467-019-08408-6 en eng Nature Research https://oceanrep.geomar.de/id/eprint/45772/1/s41467-019-08408-6.pdf https://oceanrep.geomar.de/id/eprint/45772/2/41467_2019_8408_MOESM1_ESM.docx Lochte, A. A., Repschläger, J., Kienast, M. , Garbe-Schönberg, D. , Andersen, N., Hamann, C. and Schneider, R. (2019) Labrador Sea freshening at 8.5 ka BP caused by Hudson Bay Ice Saddle collapse. Open Access Nature Communications, 10 (586). DOI 10.1038/s41467-019-08408-6 <https://doi.org/10.1038/s41467-019-08408-6>. doi:10.1038/s41467-019-08408-6 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2019 ftoceanrep https://doi.org/10.1038/s41467-019-08408-6 2023-04-07T15:43:41Z 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 OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Hudson Bay Greenland Hudson Nature Communications 10 1 |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
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, Annalena Antonia Repschläger, Janne Kienast, Markus Garbe-Schönberg, Dieter Andersen, Nils Hamann, Christian Schneider, Ralph |
spellingShingle |
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 |
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 Research |
publishDate |
2019 |
url |
https://oceanrep.geomar.de/id/eprint/45772/ https://oceanrep.geomar.de/id/eprint/45772/1/s41467-019-08408-6.pdf https://oceanrep.geomar.de/id/eprint/45772/2/41467_2019_8408_MOESM1_ESM.docx https://www.nature.com/articles/s41467-019-08408-6 https://doi.org/10.1038/s41467-019-08408-6 |
geographic |
Hudson Bay Greenland Hudson |
geographic_facet |
Hudson Bay Greenland Hudson |
genre |
Greenland Hudson Bay Ice Sheet Labrador Sea |
genre_facet |
Greenland Hudson Bay Ice Sheet Labrador Sea |
op_relation |
https://oceanrep.geomar.de/id/eprint/45772/1/s41467-019-08408-6.pdf https://oceanrep.geomar.de/id/eprint/45772/2/41467_2019_8408_MOESM1_ESM.docx Lochte, A. A., Repschläger, J., Kienast, M. , Garbe-Schönberg, D. , Andersen, N., Hamann, C. and Schneider, R. (2019) Labrador Sea freshening at 8.5 ka BP caused by Hudson Bay Ice Saddle collapse. Open Access Nature Communications, 10 (586). DOI 10.1038/s41467-019-08408-6 <https://doi.org/10.1038/s41467-019-08408-6>. doi:10.1038/s41467-019-08408-6 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41467-019-08408-6 |
container_title |
Nature Communications |
container_volume |
10 |
container_issue |
1 |
_version_ |
1766018607286845440 |