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....
Published in: | Ocean Science |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Gesellschaft Mbh
2010
|
Subjects: | |
Online Access: | https://archimer.ifremer.fr/doc/00037/14784/12093.pdf https://doi.org/10.5194/os-6-749-2010 https://archimer.ifremer.fr/doc/00037/14784/ |
id |
ftarchimer:oai:archimer.ifremer.fr:14784 |
---|---|
record_format |
openpolar |
spelling |
ftarchimer:oai:archimer.ifremer.fr:14784 2023-05-15T15:35:06+02:00 Short-term impacts of enhanced Greenland freshwater fluxes in an eddy-permitting ocean model Marsh, R. Desbruyeres, Damien Bamber, J. L. De Cuevas, B. A. Coward, A. C. Aksenov, Y. 2010 application/pdf https://archimer.ifremer.fr/doc/00037/14784/12093.pdf https://doi.org/10.5194/os-6-749-2010 https://archimer.ifremer.fr/doc/00037/14784/ eng eng Copernicus Gesellschaft Mbh https://archimer.ifremer.fr/doc/00037/14784/12093.pdf doi:10.5194/os-6-749-2010 https://archimer.ifremer.fr/doc/00037/14784/ Author(s) 2010. This work is distributed under the Creative Commons Attribution 3.0 License. EGU info:eu-repo/semantics/openAccess restricted use CC-BY Ocean Science (1812-0784) (Copernicus Gesellschaft Mbh), 2010 , Vol. 6 , N. 3 , P. 749-760 text Publication info:eu-repo/semantics/article 2010 ftarchimer https://doi.org/10.5194/os-6-749-2010 2021-11-23T23:50:09Z 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 similar to 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 Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Baffin Bay Greenland Ocean Science 6 3 749 760 |
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 |
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 similar to 10%. Implications for the post-2000 acceleration of Greenland mass loss are discussed. |
format |
Article in Journal/Newspaper |
author |
Marsh, R. Desbruyeres, Damien Bamber, J. L. De Cuevas, B. A. Coward, A. C. Aksenov, Y. |
spellingShingle |
Marsh, R. Desbruyeres, Damien 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 |
author_facet |
Marsh, R. Desbruyeres, Damien 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 Gesellschaft Mbh |
publishDate |
2010 |
url |
https://archimer.ifremer.fr/doc/00037/14784/12093.pdf https://doi.org/10.5194/os-6-749-2010 https://archimer.ifremer.fr/doc/00037/14784/ |
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_source |
Ocean Science (1812-0784) (Copernicus Gesellschaft Mbh), 2010 , Vol. 6 , N. 3 , P. 749-760 |
op_relation |
https://archimer.ifremer.fr/doc/00037/14784/12093.pdf doi:10.5194/os-6-749-2010 https://archimer.ifremer.fr/doc/00037/14784/ |
op_rights |
Author(s) 2010. This work is distributed under the Creative Commons Attribution 3.0 License. EGU info:eu-repo/semantics/openAccess restricted use |
op_rightsnorm |
CC-BY |
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 |
_version_ |
1766365400032870400 |