Sensitivity of Greenland Ice Sheet surface mass balance to perturbations in sea surface temperature and sea ice cover: a study with the regional climate model MAR
During recent summers (2007–2012), several surface melt records were broken over the Greenland Ice Sheet (GrIS). The extreme summer melt resulted in part from a persistent negative phase of the North Atlantic Oscillation (NAO), favoring warmer atmospheric conditions than normal over the GrIS. Simult...
Published in: | The Cryosphere |
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Copernicus Publications
2014
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Online Access: | https://doi.org/10.5194/tc-8-1871-2014 http://www.the-cryosphere.net/8/1871/2014/tc-8-1871-2014.pdf https://doaj.org/article/24cbd09e9db74487be01372f4eb9137c |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:24cbd09e9db74487be01372f4eb9137c 2023-05-15T16:27:11+02:00 Sensitivity of Greenland Ice Sheet surface mass balance to perturbations in sea surface temperature and sea ice cover: a study with the regional climate model MAR B. Noël X. Fettweis W. J. van de Berg M. R. van den Broeke M. Erpicum 2014-10-01 https://doi.org/10.5194/tc-8-1871-2014 http://www.the-cryosphere.net/8/1871/2014/tc-8-1871-2014.pdf https://doaj.org/article/24cbd09e9db74487be01372f4eb9137c en eng Copernicus Publications 1994-0416 1994-0424 doi:10.5194/tc-8-1871-2014 http://www.the-cryosphere.net/8/1871/2014/tc-8-1871-2014.pdf https://doaj.org/article/24cbd09e9db74487be01372f4eb9137c undefined The Cryosphere, Vol 8, Iss 5, Pp 1871-1883 (2014) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2014 fttriple https://doi.org/10.5194/tc-8-1871-2014 2023-01-22T18:35:24Z During recent summers (2007–2012), several surface melt records were broken over the Greenland Ice Sheet (GrIS). The extreme summer melt resulted in part from a persistent negative phase of the North Atlantic Oscillation (NAO), favoring warmer atmospheric conditions than normal over the GrIS. Simultaneously, large anomalies in sea ice cover (SIC) and sea surface temperature (SST) were observed in the North Atlantic, suggesting a possible connection. To assess the direct impact of 2007–2012 SIC and SST anomalies on GrIS surface mass balance (SMB), a set of sensitivity experiments was carried out with the regional climate model MAR forced by ERA-Interim. These simulations suggest that perturbations in SST and SIC in the seas surrounding Greenland do not considerably impact GrIS SMB, as a result of the katabatic wind blocking effect. These offshore-directed winds prevent oceanic near-surface air, influenced by SIC and SST anomalies, from penetrating far inland. Therefore, the ice sheet SMB response is restricted to coastal regions, where katabatic winds cease. A topic for further investigation is how anomalies in SIC and SST might have indirectly affected the surface melt by changing the general circulation in the North Atlantic region, hence favoring more frequent warm air advection towards the GrIS. Article in Journal/Newspaper Greenland Ice Sheet North Atlantic North Atlantic oscillation Sea ice The Cryosphere Unknown Greenland The Cryosphere 8 5 1871 1883 |
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language |
English |
topic |
geo envir |
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geo envir B. Noël X. Fettweis W. J. van de Berg M. R. van den Broeke M. Erpicum Sensitivity of Greenland Ice Sheet surface mass balance to perturbations in sea surface temperature and sea ice cover: a study with the regional climate model MAR |
topic_facet |
geo envir |
description |
During recent summers (2007–2012), several surface melt records were broken over the Greenland Ice Sheet (GrIS). The extreme summer melt resulted in part from a persistent negative phase of the North Atlantic Oscillation (NAO), favoring warmer atmospheric conditions than normal over the GrIS. Simultaneously, large anomalies in sea ice cover (SIC) and sea surface temperature (SST) were observed in the North Atlantic, suggesting a possible connection. To assess the direct impact of 2007–2012 SIC and SST anomalies on GrIS surface mass balance (SMB), a set of sensitivity experiments was carried out with the regional climate model MAR forced by ERA-Interim. These simulations suggest that perturbations in SST and SIC in the seas surrounding Greenland do not considerably impact GrIS SMB, as a result of the katabatic wind blocking effect. These offshore-directed winds prevent oceanic near-surface air, influenced by SIC and SST anomalies, from penetrating far inland. Therefore, the ice sheet SMB response is restricted to coastal regions, where katabatic winds cease. A topic for further investigation is how anomalies in SIC and SST might have indirectly affected the surface melt by changing the general circulation in the North Atlantic region, hence favoring more frequent warm air advection towards the GrIS. |
format |
Article in Journal/Newspaper |
author |
B. Noël X. Fettweis W. J. van de Berg M. R. van den Broeke M. Erpicum |
author_facet |
B. Noël X. Fettweis W. J. van de Berg M. R. van den Broeke M. Erpicum |
author_sort |
B. Noël |
title |
Sensitivity of Greenland Ice Sheet surface mass balance to perturbations in sea surface temperature and sea ice cover: a study with the regional climate model MAR |
title_short |
Sensitivity of Greenland Ice Sheet surface mass balance to perturbations in sea surface temperature and sea ice cover: a study with the regional climate model MAR |
title_full |
Sensitivity of Greenland Ice Sheet surface mass balance to perturbations in sea surface temperature and sea ice cover: a study with the regional climate model MAR |
title_fullStr |
Sensitivity of Greenland Ice Sheet surface mass balance to perturbations in sea surface temperature and sea ice cover: a study with the regional climate model MAR |
title_full_unstemmed |
Sensitivity of Greenland Ice Sheet surface mass balance to perturbations in sea surface temperature and sea ice cover: a study with the regional climate model MAR |
title_sort |
sensitivity of greenland ice sheet surface mass balance to perturbations in sea surface temperature and sea ice cover: a study with the regional climate model mar |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/tc-8-1871-2014 http://www.the-cryosphere.net/8/1871/2014/tc-8-1871-2014.pdf https://doaj.org/article/24cbd09e9db74487be01372f4eb9137c |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet North Atlantic North Atlantic oscillation Sea ice The Cryosphere |
genre_facet |
Greenland Ice Sheet North Atlantic North Atlantic oscillation Sea ice The Cryosphere |
op_source |
The Cryosphere, Vol 8, Iss 5, Pp 1871-1883 (2014) |
op_relation |
1994-0416 1994-0424 doi:10.5194/tc-8-1871-2014 http://www.the-cryosphere.net/8/1871/2014/tc-8-1871-2014.pdf https://doaj.org/article/24cbd09e9db74487be01372f4eb9137c |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-8-1871-2014 |
container_title |
The Cryosphere |
container_volume |
8 |
container_issue |
5 |
container_start_page |
1871 |
op_container_end_page |
1883 |
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1766016269276938240 |