Late Eemian warming in the Nordic Seas as seen in proxy data and climate models
We analyze a transient simulation of the last glacial inception in a climate model of intermediate complexity, focusing on sea ice-ocean circulation dynamics in the North Atlantic and Nordic Seas. As northern high-latitude summer insolation decreases toward the end of the Eemian interglacial, Arctic...
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Amer Geophysical Union
2011
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Online Access: | https://archimer.ifremer.fr/doc/00227/33858/32375.pdf https://archimer.ifremer.fr/doc/00227/33858/32376.pdf https://doi.org/10.1029/2010PA002027 https://archimer.ifremer.fr/doc/00227/33858/ |
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ftarchimer:oai:archimer.ifremer.fr:33858 2023-05-15T15:06:22+02:00 Late Eemian warming in the Nordic Seas as seen in proxy data and climate models Born, A. Nisancioglu, K. H. Risebrobakken, B. 2011-04 application/pdf https://archimer.ifremer.fr/doc/00227/33858/32375.pdf https://archimer.ifremer.fr/doc/00227/33858/32376.pdf https://doi.org/10.1029/2010PA002027 https://archimer.ifremer.fr/doc/00227/33858/ eng eng Amer Geophysical Union https://archimer.ifremer.fr/doc/00227/33858/32375.pdf https://archimer.ifremer.fr/doc/00227/33858/32376.pdf doi:10.1029/2010PA002027 https://archimer.ifremer.fr/doc/00227/33858/ Copyright 2011 by the American Geophysical Union info:eu-repo/semantics/openAccess restricted use Paleoceanography (0883-8305) (Amer Geophysical Union), 2011-04 , Vol. 26 , P. - text Publication info:eu-repo/semantics/article 2011 ftarchimer https://doi.org/10.1029/2010PA002027 2021-09-23T20:25:10Z We analyze a transient simulation of the last glacial inception in a climate model of intermediate complexity, focusing on sea ice-ocean circulation dynamics in the North Atlantic and Nordic Seas. As northern high-latitude summer insolation decreases toward the end of the Eemian interglacial, Arctic sea ice export to the North Atlantic increases. This surface fresh water transport weakens deep water formation in the North Atlantic and the near-surface circulation of the subpolar gyre. As a consequence, the relative contribution of subpolar gyre waters to the Atlantic inflow into the Nordic Seas is reduced, giving way to more warm and saline subtropical waters from the North Atlantic Current. We thus find an episode of relatively high heat and salt transport into the Nordic Seas during the last glacial inception between 119,000 and 115,000 years before present. This stabilizes deep ocean convection in the region and warms Scandinavia during a phase of low insolation. These findings are in good agreement with proxy data from the Nordic Seas and North Atlantic. At the end of the warm interval, sea surface temperature drops by about 3 degrees C, marking the onset of large-scale glacier growth over Scandinavia. Article in Journal/Newspaper Arctic Nordic Seas north atlantic current North Atlantic Sea ice Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Arctic Paleoceanography 26 2 n/a n/a |
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 |
We analyze a transient simulation of the last glacial inception in a climate model of intermediate complexity, focusing on sea ice-ocean circulation dynamics in the North Atlantic and Nordic Seas. As northern high-latitude summer insolation decreases toward the end of the Eemian interglacial, Arctic sea ice export to the North Atlantic increases. This surface fresh water transport weakens deep water formation in the North Atlantic and the near-surface circulation of the subpolar gyre. As a consequence, the relative contribution of subpolar gyre waters to the Atlantic inflow into the Nordic Seas is reduced, giving way to more warm and saline subtropical waters from the North Atlantic Current. We thus find an episode of relatively high heat and salt transport into the Nordic Seas during the last glacial inception between 119,000 and 115,000 years before present. This stabilizes deep ocean convection in the region and warms Scandinavia during a phase of low insolation. These findings are in good agreement with proxy data from the Nordic Seas and North Atlantic. At the end of the warm interval, sea surface temperature drops by about 3 degrees C, marking the onset of large-scale glacier growth over Scandinavia. |
format |
Article in Journal/Newspaper |
author |
Born, A. Nisancioglu, K. H. Risebrobakken, B. |
spellingShingle |
Born, A. Nisancioglu, K. H. Risebrobakken, B. Late Eemian warming in the Nordic Seas as seen in proxy data and climate models |
author_facet |
Born, A. Nisancioglu, K. H. Risebrobakken, B. |
author_sort |
Born, A. |
title |
Late Eemian warming in the Nordic Seas as seen in proxy data and climate models |
title_short |
Late Eemian warming in the Nordic Seas as seen in proxy data and climate models |
title_full |
Late Eemian warming in the Nordic Seas as seen in proxy data and climate models |
title_fullStr |
Late Eemian warming in the Nordic Seas as seen in proxy data and climate models |
title_full_unstemmed |
Late Eemian warming in the Nordic Seas as seen in proxy data and climate models |
title_sort |
late eemian warming in the nordic seas as seen in proxy data and climate models |
publisher |
Amer Geophysical Union |
publishDate |
2011 |
url |
https://archimer.ifremer.fr/doc/00227/33858/32375.pdf https://archimer.ifremer.fr/doc/00227/33858/32376.pdf https://doi.org/10.1029/2010PA002027 https://archimer.ifremer.fr/doc/00227/33858/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Nordic Seas north atlantic current North Atlantic Sea ice |
genre_facet |
Arctic Nordic Seas north atlantic current North Atlantic Sea ice |
op_source |
Paleoceanography (0883-8305) (Amer Geophysical Union), 2011-04 , Vol. 26 , P. - |
op_relation |
https://archimer.ifremer.fr/doc/00227/33858/32375.pdf https://archimer.ifremer.fr/doc/00227/33858/32376.pdf doi:10.1029/2010PA002027 https://archimer.ifremer.fr/doc/00227/33858/ |
op_rights |
Copyright 2011 by the American Geophysical Union info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1029/2010PA002027 |
container_title |
Paleoceanography |
container_volume |
26 |
container_issue |
2 |
container_start_page |
n/a |
op_container_end_page |
n/a |
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1766337995292540928 |