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 km3 yr−2) and run-off (+7.9±3.3 km3 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...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:45f584f9acf449ba9c88a3f2d89b9e6b 2023-05-15T16:28:28+02:00 Reconstruction of the 1979–2006 Greenland ice sheet surface mass balance using the regional climate model MAR X. Fettweis 2007-10-01 http://www.the-cryosphere.net/1/21/2007/tc-1-21-2007.pdf https://doaj.org/article/45f584f9acf449ba9c88a3f2d89b9e6b en eng Copernicus Publications 1994-0416 1994-0424 http://www.the-cryosphere.net/1/21/2007/tc-1-21-2007.pdf https://doaj.org/article/45f584f9acf449ba9c88a3f2d89b9e6b undefined The Cryosphere, Vol 1, Iss 1, Pp 21-40 (2007) envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2007 fttriple 2023-01-22T19:07:25Z Results from a 28-year simulation (1979–2006) over the Greenland ice sheet (GrIS) reveal an increase of solid precipitation (+0.4±2.5 km3 yr−2) and run-off (+7.9±3.3 km3 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 km3 yr−2. The contribution of changes in the net water vapour flux (+0.02±0.09 km3 yr−2) and rainfall (+0.2±0.2 km3 yr−2) to the SMB variability is negligible. The meltwater supply has increased because the GrIS surface has been warming up +2.4°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 W m−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 Unknown Greenland |
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English |
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envir geo X. Fettweis Reconstruction of the 1979–2006 Greenland ice sheet surface mass balance using the regional climate model MAR |
topic_facet |
envir geo |
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 km3 yr−2) and run-off (+7.9±3.3 km3 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 km3 yr−2. The contribution of changes in the net water vapour flux (+0.02±0.09 km3 yr−2) and rainfall (+0.2±0.2 km3 yr−2) to the SMB variability is negligible. The meltwater supply has increased because the GrIS surface has been warming up +2.4°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 W m−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. |
format |
Article in Journal/Newspaper |
author |
X. Fettweis |
author_facet |
X. Fettweis |
author_sort |
X. Fettweis |
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 Publications |
publishDate |
2007 |
url |
http://www.the-cryosphere.net/1/21/2007/tc-1-21-2007.pdf https://doaj.org/article/45f584f9acf449ba9c88a3f2d89b9e6b |
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, Iss 1, Pp 21-40 (2007) |
op_relation |
1994-0416 1994-0424 http://www.the-cryosphere.net/1/21/2007/tc-1-21-2007.pdf https://doaj.org/article/45f584f9acf449ba9c88a3f2d89b9e6b |
op_rights |
undefined |
_version_ |
1766018123829346304 |