Lake Agassiz final drainage event in the northwest North Atlantic
The 8.2 ka "climate'' event recorded in Greenland ice cores is subject of debates with respect to causal linkage with a collapse of the Atlantic Meridional Overturning due to the drainage of the late-glacial lake Agassiz. Here, we present records from the NW North Atlantic, down-curre...
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ftarchimer:oai:archimer.ifremer.fr:34645 2023-05-15T16:29:04+02:00 Lake Agassiz final drainage event in the northwest North Atlantic Hillaire-marcel, C. De Vernal, Anne Piper, David J. W. 2007-08 application/pdf https://archimer.ifremer.fr/doc/00235/34645/33006.pdf https://doi.org/10.1026/2007GL030396 https://archimer.ifremer.fr/doc/00235/34645/ eng eng Amer Geophysical Union https://archimer.ifremer.fr/doc/00235/34645/33006.pdf doi:10.1026/2007GL030396 https://archimer.ifremer.fr/doc/00235/34645/ Copyright 2007 by the American Geophysical Union. info:eu-repo/semantics/openAccess restricted use Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2007-08 , Vol. 34 , N. L15601 , P. 1-5 text Publication info:eu-repo/semantics/article 2007 ftarchimer https://doi.org/10.1026/2007GL030396 2021-09-23T20:25:26Z The 8.2 ka "climate'' event recorded in Greenland ice cores is subject of debates with respect to causal linkage with a collapse of the Atlantic Meridional Overturning due to the drainage of the late-glacial lake Agassiz. Here, we present records from the NW North Atlantic, down-current the flood discharge route, showing that the 9.5-8 ka interval was marked by a succession of events. The drainage itself corresponds to a twin-layer of carbonate-rich turbidites deposited within the calibrated 8.35-8.5 ka interval. Proxies of sea-surface and deep-current conditions do not indicate significant concomitant changes in the NW North Atlantic. The dataset,however, supports the concept that the 8.2 ka "climate'' event may represent one of the manifestations of climate instability during an interval with major changes of land drainage in NE America, due to the collapse of the Laurentide Ice Sheet, subsequent fast sea level rise and large scale reorganization of the North Atlantic thermohaline circulation pattern. Article in Journal/Newspaper Greenland Greenland ice cores Ice Sheet North Atlantic North atlantic Thermohaline circulation Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) Greenland |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
The 8.2 ka "climate'' event recorded in Greenland ice cores is subject of debates with respect to causal linkage with a collapse of the Atlantic Meridional Overturning due to the drainage of the late-glacial lake Agassiz. Here, we present records from the NW North Atlantic, down-current the flood discharge route, showing that the 9.5-8 ka interval was marked by a succession of events. The drainage itself corresponds to a twin-layer of carbonate-rich turbidites deposited within the calibrated 8.35-8.5 ka interval. Proxies of sea-surface and deep-current conditions do not indicate significant concomitant changes in the NW North Atlantic. The dataset,however, supports the concept that the 8.2 ka "climate'' event may represent one of the manifestations of climate instability during an interval with major changes of land drainage in NE America, due to the collapse of the Laurentide Ice Sheet, subsequent fast sea level rise and large scale reorganization of the North Atlantic thermohaline circulation pattern. |
format |
Article in Journal/Newspaper |
author |
Hillaire-marcel, C. De Vernal, Anne Piper, David J. W. |
spellingShingle |
Hillaire-marcel, C. De Vernal, Anne Piper, David J. W. Lake Agassiz final drainage event in the northwest North Atlantic |
author_facet |
Hillaire-marcel, C. De Vernal, Anne Piper, David J. W. |
author_sort |
Hillaire-marcel, C. |
title |
Lake Agassiz final drainage event in the northwest North Atlantic |
title_short |
Lake Agassiz final drainage event in the northwest North Atlantic |
title_full |
Lake Agassiz final drainage event in the northwest North Atlantic |
title_fullStr |
Lake Agassiz final drainage event in the northwest North Atlantic |
title_full_unstemmed |
Lake Agassiz final drainage event in the northwest North Atlantic |
title_sort |
lake agassiz final drainage event in the northwest north atlantic |
publisher |
Amer Geophysical Union |
publishDate |
2007 |
url |
https://archimer.ifremer.fr/doc/00235/34645/33006.pdf https://doi.org/10.1026/2007GL030396 https://archimer.ifremer.fr/doc/00235/34645/ |
long_lat |
ENVELOPE(-129.463,-129.463,58.259,58.259) |
geographic |
Glacial Lake Greenland |
geographic_facet |
Glacial Lake Greenland |
genre |
Greenland Greenland ice cores Ice Sheet North Atlantic North atlantic Thermohaline circulation |
genre_facet |
Greenland Greenland ice cores Ice Sheet North Atlantic North atlantic Thermohaline circulation |
op_source |
Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2007-08 , Vol. 34 , N. L15601 , P. 1-5 |
op_relation |
https://archimer.ifremer.fr/doc/00235/34645/33006.pdf doi:10.1026/2007GL030396 https://archimer.ifremer.fr/doc/00235/34645/ |
op_rights |
Copyright 2007 by the American Geophysical Union. info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1026/2007GL030396 |
_version_ |
1766018749395107840 |