Contrasting trends in north Atlantic deep-water formation in the Labrador Sea and Nordic Seas during the Holocene
The Holocene North Atlantic deep-water formation is studied in a 9,000-year long simulation with a coupled climate model of intermediate complexity, forced by changes in orbital forcing and atmospheric trace gas concentrations. During the experiment, deep-water formation in the Nordic Seas is reduce...
Published in: | Geophysical Research Letters |
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Language: | English |
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Amer Geophysical Union
2005
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Online Access: | http://hdl.handle.net/2078.1/39374 https://doi.org/10.1029/2005GL022462 |
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ftunivlouvain:oai:dial.uclouvain.be:boreal:39374 2024-05-19T07:36:10+00:00 Contrasting trends in north Atlantic deep-water formation in the Labrador Sea and Nordic Seas during the Holocene Renssen, H. Goosse, Hugues Fichefet, Thierry UCL - SC/PHYS - Département de physique UCL - SST/ELI/ELIC - Earth & Climate 2005 http://hdl.handle.net/2078.1/39374 https://doi.org/10.1029/2005GL022462 eng eng Amer Geophysical Union boreal:39374 http://hdl.handle.net/2078.1/39374 doi:10.1029/2005GL022462 urn:ISSN:0094-8276 urn:EISSN:1944-8007 Geophysical Research Letters, Vol. 32, no. 8 (2005) info:eu-repo/semantics/article 2005 ftunivlouvain https://doi.org/10.1029/2005GL022462 2024-04-24T01:49:20Z The Holocene North Atlantic deep-water formation is studied in a 9,000-year long simulation with a coupled climate model of intermediate complexity, forced by changes in orbital forcing and atmospheric trace gas concentrations. During the experiment, deep-water formation in the Nordic Seas is reduced due to an enhanced influx of sea ice from the Central Arctic, decreasing both surface salinity and density, whereas deep-water formation in the Labrador Sea increases due to surface cooling. This leads to changes in the distribution of oceanic heat transported northwards by the Atlantic Ocean, with less heat released ( - 120 Wm(-2) in February) in the Nordic Seas, amplifying the surface cooling and increasing the sea-ice cover. In the Labrador Sea, the oceanic heat release increases slightly (+ 14 Wm(-2)), thus dampening locally the cooling trend. The overall Atlantic overturning strength remains constant throughout the experiment. Over the Nordic Seas, reduced evaporation contributes to the surface freshening. Article in Journal/Newspaper Arctic Labrador Sea Nordic Seas North Atlantic Deep Water North Atlantic Sea ice DIAL@UCLouvain (Université catholique de Louvain) Geophysical Research Letters 32 8 |
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Open Polar |
collection |
DIAL@UCLouvain (Université catholique de Louvain) |
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ftunivlouvain |
language |
English |
description |
The Holocene North Atlantic deep-water formation is studied in a 9,000-year long simulation with a coupled climate model of intermediate complexity, forced by changes in orbital forcing and atmospheric trace gas concentrations. During the experiment, deep-water formation in the Nordic Seas is reduced due to an enhanced influx of sea ice from the Central Arctic, decreasing both surface salinity and density, whereas deep-water formation in the Labrador Sea increases due to surface cooling. This leads to changes in the distribution of oceanic heat transported northwards by the Atlantic Ocean, with less heat released ( - 120 Wm(-2) in February) in the Nordic Seas, amplifying the surface cooling and increasing the sea-ice cover. In the Labrador Sea, the oceanic heat release increases slightly (+ 14 Wm(-2)), thus dampening locally the cooling trend. The overall Atlantic overturning strength remains constant throughout the experiment. Over the Nordic Seas, reduced evaporation contributes to the surface freshening. |
author2 |
UCL - SC/PHYS - Département de physique UCL - SST/ELI/ELIC - Earth & Climate |
format |
Article in Journal/Newspaper |
author |
Renssen, H. Goosse, Hugues Fichefet, Thierry |
spellingShingle |
Renssen, H. Goosse, Hugues Fichefet, Thierry Contrasting trends in north Atlantic deep-water formation in the Labrador Sea and Nordic Seas during the Holocene |
author_facet |
Renssen, H. Goosse, Hugues Fichefet, Thierry |
author_sort |
Renssen, H. |
title |
Contrasting trends in north Atlantic deep-water formation in the Labrador Sea and Nordic Seas during the Holocene |
title_short |
Contrasting trends in north Atlantic deep-water formation in the Labrador Sea and Nordic Seas during the Holocene |
title_full |
Contrasting trends in north Atlantic deep-water formation in the Labrador Sea and Nordic Seas during the Holocene |
title_fullStr |
Contrasting trends in north Atlantic deep-water formation in the Labrador Sea and Nordic Seas during the Holocene |
title_full_unstemmed |
Contrasting trends in north Atlantic deep-water formation in the Labrador Sea and Nordic Seas during the Holocene |
title_sort |
contrasting trends in north atlantic deep-water formation in the labrador sea and nordic seas during the holocene |
publisher |
Amer Geophysical Union |
publishDate |
2005 |
url |
http://hdl.handle.net/2078.1/39374 https://doi.org/10.1029/2005GL022462 |
genre |
Arctic Labrador Sea Nordic Seas North Atlantic Deep Water North Atlantic Sea ice |
genre_facet |
Arctic Labrador Sea Nordic Seas North Atlantic Deep Water North Atlantic Sea ice |
op_source |
Geophysical Research Letters, Vol. 32, no. 8 (2005) |
op_relation |
boreal:39374 http://hdl.handle.net/2078.1/39374 doi:10.1029/2005GL022462 urn:ISSN:0094-8276 urn:EISSN:1944-8007 |
op_doi |
https://doi.org/10.1029/2005GL022462 |
container_title |
Geophysical Research Letters |
container_volume |
32 |
container_issue |
8 |
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1799475218260951040 |