Short-term impacts of enhanced Greenland freshwater fluxes in an eddy-permitting ocean model
In a sensitivity experiment, an eddy-permitting ocean general circulation model is forced with realistic freshwater fluxes from the Greenland Ice Sheet, averaged for the period 1991–2000. The fluxes are obtained with a mass balance model for the ice sheet, forced with the ERA-40 reanalysis dataset....
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Copernicus Publications
2010
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00028684 2023-05-15T15:35:06+02:00 Short-term impacts of enhanced Greenland freshwater fluxes in an eddy-permitting ocean model Marsh, R. Desbruyères, D. Bamber, J. L. de Cuevas, B. A. Coward, A. C. Aksenov, Y. 2010-07 electronic https://doi.org/10.5194/os-6-749-2010 https://noa.gwlb.de/receive/cop_mods_00028684 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00028639/os-6-749-2010.pdf https://os.copernicus.org/articles/6/749/2010/os-6-749-2010.pdf eng eng Copernicus Publications Ocean Science -- http://www.bibliothek.uni-regensburg.de/ezeit/?2183769 -- http://www.copernicus.org/EGU/os/os.html -- 1812-0792 https://doi.org/10.5194/os-6-749-2010 https://noa.gwlb.de/receive/cop_mods_00028684 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00028639/os-6-749-2010.pdf https://os.copernicus.org/articles/6/749/2010/os-6-749-2010.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2010 ftnonlinearchiv https://doi.org/10.5194/os-6-749-2010 2022-02-08T22:48:06Z In a sensitivity experiment, an eddy-permitting ocean general circulation model is forced with realistic freshwater fluxes from the Greenland Ice Sheet, averaged for the period 1991–2000. The fluxes are obtained with a mass balance model for the ice sheet, forced with the ERA-40 reanalysis dataset. The freshwater flux is distributed around Greenland as an additional term in prescribed runoff, representing seasonal melting of the ice sheet and a fixed year-round iceberg calving flux, for 8.5 model years. By adding Greenland freshwater fluxes with realistic geographical distribution and seasonality, the experiment is designed to investigate the oceanic response to a sudden and spatially/temporally uniform amplification of ice sheet melting and discharge, rather than localized or gradual changes in freshwater flux. The impacts on regional hydrography and circulation are investigated by comparing the sensitivity experiment to a control experiment, without additional fluxes. By the end of the sensitivity experiment, the majority of additional fresh water has accumulated in Baffin Bay, and only a small fraction has reached the interior of the Labrador Sea, where winter mixed layer depth is sensitive to small changes in salinity. As a consequence, the impact on large-scale circulation is very slight. An indirect impact of strong freshening off the west coast of Greenland is a small anti-cyclonic component to the circulation around Greenland, which opposes the wind-driven cyclonic circulation and reduces net southward flow through the Canadian Archipelago by ~10%. Implications for the post-2000 acceleration of Greenland mass loss are discussed. Article in Journal/Newspaper Baffin Bay Baffin Bay Baffin Canadian Archipelago Greenland Ice Sheet Labrador Sea Niedersächsisches Online-Archiv NOA Baffin Bay Greenland Ocean Science 6 3 749 760 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Marsh, R. Desbruyères, D. Bamber, J. L. de Cuevas, B. A. Coward, A. C. Aksenov, Y. Short-term impacts of enhanced Greenland freshwater fluxes in an eddy-permitting ocean model |
topic_facet |
article Verlagsveröffentlichung |
description |
In a sensitivity experiment, an eddy-permitting ocean general circulation model is forced with realistic freshwater fluxes from the Greenland Ice Sheet, averaged for the period 1991–2000. The fluxes are obtained with a mass balance model for the ice sheet, forced with the ERA-40 reanalysis dataset. The freshwater flux is distributed around Greenland as an additional term in prescribed runoff, representing seasonal melting of the ice sheet and a fixed year-round iceberg calving flux, for 8.5 model years. By adding Greenland freshwater fluxes with realistic geographical distribution and seasonality, the experiment is designed to investigate the oceanic response to a sudden and spatially/temporally uniform amplification of ice sheet melting and discharge, rather than localized or gradual changes in freshwater flux. The impacts on regional hydrography and circulation are investigated by comparing the sensitivity experiment to a control experiment, without additional fluxes. By the end of the sensitivity experiment, the majority of additional fresh water has accumulated in Baffin Bay, and only a small fraction has reached the interior of the Labrador Sea, where winter mixed layer depth is sensitive to small changes in salinity. As a consequence, the impact on large-scale circulation is very slight. An indirect impact of strong freshening off the west coast of Greenland is a small anti-cyclonic component to the circulation around Greenland, which opposes the wind-driven cyclonic circulation and reduces net southward flow through the Canadian Archipelago by ~10%. Implications for the post-2000 acceleration of Greenland mass loss are discussed. |
format |
Article in Journal/Newspaper |
author |
Marsh, R. Desbruyères, D. Bamber, J. L. de Cuevas, B. A. Coward, A. C. Aksenov, Y. |
author_facet |
Marsh, R. Desbruyères, D. Bamber, J. L. de Cuevas, B. A. Coward, A. C. Aksenov, Y. |
author_sort |
Marsh, R. |
title |
Short-term impacts of enhanced Greenland freshwater fluxes in an eddy-permitting ocean model |
title_short |
Short-term impacts of enhanced Greenland freshwater fluxes in an eddy-permitting ocean model |
title_full |
Short-term impacts of enhanced Greenland freshwater fluxes in an eddy-permitting ocean model |
title_fullStr |
Short-term impacts of enhanced Greenland freshwater fluxes in an eddy-permitting ocean model |
title_full_unstemmed |
Short-term impacts of enhanced Greenland freshwater fluxes in an eddy-permitting ocean model |
title_sort |
short-term impacts of enhanced greenland freshwater fluxes in an eddy-permitting ocean model |
publisher |
Copernicus Publications |
publishDate |
2010 |
url |
https://doi.org/10.5194/os-6-749-2010 https://noa.gwlb.de/receive/cop_mods_00028684 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00028639/os-6-749-2010.pdf https://os.copernicus.org/articles/6/749/2010/os-6-749-2010.pdf |
geographic |
Baffin Bay Greenland |
geographic_facet |
Baffin Bay Greenland |
genre |
Baffin Bay Baffin Bay Baffin Canadian Archipelago Greenland Ice Sheet Labrador Sea |
genre_facet |
Baffin Bay Baffin Bay Baffin Canadian Archipelago Greenland Ice Sheet Labrador Sea |
op_relation |
Ocean Science -- http://www.bibliothek.uni-regensburg.de/ezeit/?2183769 -- http://www.copernicus.org/EGU/os/os.html -- 1812-0792 https://doi.org/10.5194/os-6-749-2010 https://noa.gwlb.de/receive/cop_mods_00028684 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00028639/os-6-749-2010.pdf https://os.copernicus.org/articles/6/749/2010/os-6-749-2010.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/os-6-749-2010 |
container_title |
Ocean Science |
container_volume |
6 |
container_issue |
3 |
container_start_page |
749 |
op_container_end_page |
760 |
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1766365398032187392 |