Reconstruction of the 1979-2006 Greenland ice sheet surface mass balance using the regional climate model MAR
Results from a 28-year simulation (1979 2006) over the Greenland ice sheet (GrIS) reveal an increase of solid precipitation (+ 0.4 +/- 2.5 km(3) yr(-2)) and runoff (+ 7.9 +/- 3.3 km(3) yr(-2)) of surface meltwater. The net effect of these competing factors is a significant Surface Mass Balance (SMB)...
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ftunistlouisbrus:oai:dial.uclouvain.be:boreal:37178 2024-05-12T08:04:32+00:00 Reconstruction of the 1979-2006 Greenland ice sheet surface mass balance using the regional climate model MAR Fettweis, Xavier UCL - SC/PHYS - Département de physique 2007 http://hdl.handle.net/2078.1/37178 https://doi.org/10.5194/tc-1-21-2007 eng eng Copernicus Gesellschaft Mbh boreal:37178 http://hdl.handle.net/2078.1/37178 doi:10.5194/tc-1-21-2007 urn:ISSN:1994-0416 urn:EISSN:1994-0424 info:eu-repo/semantics/openAccess The Cryosphere, Vol. 1, no. 1, p. 21-40 (2007) info:eu-repo/semantics/article 2007 ftunistlouisbrus https://doi.org/10.5194/tc-1-21-2007 2024-04-18T18:15:50Z Results from a 28-year simulation (1979 2006) over the Greenland ice sheet (GrIS) reveal an increase of solid precipitation (+ 0.4 +/- 2.5 km(3) yr(-2)) and runoff (+ 7.9 +/- 3.3 km(3) yr(-2)) of surface meltwater. The net effect of these competing factors is a significant Surface Mass Balance (SMB) loss of -7.2 +/- 5.1 km(3) yr(-2). The contribution of changes in the net water vapour flux (+ 0.02 +/- 0.09 km(3) yr(-2)) and rainfall (+ 0.2 +/- 0.2 km(3) yr(-2)) to the SMB variability is negligible. The meltwater supply has increased because the GrIS surface has been warming up + 2.4 degrees C since 1979. Sensible heat flux, latent heat flux and net solar radiation have not varied significantly over the last three decades. However, the simulated downward infrared flux has increased by 9.3 Wm(-2) since 1979. The natural climate variability (e. g. the North Atlantic Oscillation) does not explain these changes. The recent global warming, due to the greenhouse gas concentration increase induced by human activities, could be a cause of these changes. The doubling of surface meltwater flux into the ocean over the period 1979-2006 suggests that the overall ice sheet mass balance has been increasingly negative, given the likely meltwater-induced acceleration of outlet glaciers. This study suggests that increased melting overshadows over an increased accumulation in a warming scenario and that the GrIS is likely to keep losing mass in the future. An enduring GrIS melting will probably affect in the future an certain effect on the stability of the thermohaline circulation and the global sea level rise. Article in Journal/Newspaper Greenland Ice Sheet North Atlantic North Atlantic oscillation The Cryosphere DIAL@USL-B (Université Saint-Louis, Bruxelles) Greenland The Cryosphere 1 1 21 40 |
institution |
Open Polar |
collection |
DIAL@USL-B (Université Saint-Louis, Bruxelles) |
op_collection_id |
ftunistlouisbrus |
language |
English |
description |
Results from a 28-year simulation (1979 2006) over the Greenland ice sheet (GrIS) reveal an increase of solid precipitation (+ 0.4 +/- 2.5 km(3) yr(-2)) and runoff (+ 7.9 +/- 3.3 km(3) yr(-2)) of surface meltwater. The net effect of these competing factors is a significant Surface Mass Balance (SMB) loss of -7.2 +/- 5.1 km(3) yr(-2). The contribution of changes in the net water vapour flux (+ 0.02 +/- 0.09 km(3) yr(-2)) and rainfall (+ 0.2 +/- 0.2 km(3) yr(-2)) to the SMB variability is negligible. The meltwater supply has increased because the GrIS surface has been warming up + 2.4 degrees C since 1979. Sensible heat flux, latent heat flux and net solar radiation have not varied significantly over the last three decades. However, the simulated downward infrared flux has increased by 9.3 Wm(-2) since 1979. The natural climate variability (e. g. the North Atlantic Oscillation) does not explain these changes. The recent global warming, due to the greenhouse gas concentration increase induced by human activities, could be a cause of these changes. The doubling of surface meltwater flux into the ocean over the period 1979-2006 suggests that the overall ice sheet mass balance has been increasingly negative, given the likely meltwater-induced acceleration of outlet glaciers. This study suggests that increased melting overshadows over an increased accumulation in a warming scenario and that the GrIS is likely to keep losing mass in the future. An enduring GrIS melting will probably affect in the future an certain effect on the stability of the thermohaline circulation and the global sea level rise. |
author2 |
UCL - SC/PHYS - Département de physique |
format |
Article in Journal/Newspaper |
author |
Fettweis, Xavier |
spellingShingle |
Fettweis, Xavier Reconstruction of the 1979-2006 Greenland ice sheet surface mass balance using the regional climate model MAR |
author_facet |
Fettweis, Xavier |
author_sort |
Fettweis, Xavier |
title |
Reconstruction of the 1979-2006 Greenland ice sheet surface mass balance using the regional climate model MAR |
title_short |
Reconstruction of the 1979-2006 Greenland ice sheet surface mass balance using the regional climate model MAR |
title_full |
Reconstruction of the 1979-2006 Greenland ice sheet surface mass balance using the regional climate model MAR |
title_fullStr |
Reconstruction of the 1979-2006 Greenland ice sheet surface mass balance using the regional climate model MAR |
title_full_unstemmed |
Reconstruction of the 1979-2006 Greenland ice sheet surface mass balance using the regional climate model MAR |
title_sort |
reconstruction of the 1979-2006 greenland ice sheet surface mass balance using the regional climate model mar |
publisher |
Copernicus Gesellschaft Mbh |
publishDate |
2007 |
url |
http://hdl.handle.net/2078.1/37178 https://doi.org/10.5194/tc-1-21-2007 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet North Atlantic North Atlantic oscillation The Cryosphere |
genre_facet |
Greenland Ice Sheet North Atlantic North Atlantic oscillation The Cryosphere |
op_source |
The Cryosphere, Vol. 1, no. 1, p. 21-40 (2007) |
op_relation |
boreal:37178 http://hdl.handle.net/2078.1/37178 doi:10.5194/tc-1-21-2007 urn:ISSN:1994-0416 urn:EISSN:1994-0424 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-1-21-2007 |
container_title |
The Cryosphere |
container_volume |
1 |
container_issue |
1 |
container_start_page |
21 |
op_container_end_page |
40 |
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1798846743937286144 |