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 run-off (+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...
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ftvliz:oai:oma.vliz.be:219568 2023-05-15T16:28:26+02:00 Reconstruction of the 1979–2006 Greenland ice sheet surface mass balance using the regional climate model MAR Fettweis, X. 2007 application/pdf https://www.vliz.be/imisdocs/publications/240021.pdf en eng info:eu-repo/semantics/altIdentifier/wos/000207505000003 info:eu-repo/semantics/altIdentifier/doi/oi.org/10.5194/tc-1-21-2007 https://www.vliz.be/imisdocs/publications/240021.pdf info:eu-repo/semantics/openAccess %3Ci%3ECryosphere+1%3C%2Fi%3E%3A+21-40.+%3Ca+href%3D%22http%3A%2F%2Fdx.doi.org%2F10.5194%2Ftc-1-21-2007%22+target%3D%22_blank%22%3Ehttp%3A%2F%2Fdx.doi.org%2F10.5194%2Ftc-1-21-2007%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2007 ftvliz https://doi.org/10.5194/tc-1-21-2007 2022-05-01T09:50:12Z 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 run-off (+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°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 Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Greenland The Cryosphere 1 1 21 40 |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
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 run-off (+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°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 |
Fettweis, X. |
spellingShingle |
Fettweis, X. Reconstruction of the 1979–2006 Greenland ice sheet surface mass balance using the regional climate model MAR |
author_facet |
Fettweis, X. |
author_sort |
Fettweis, X. |
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 |
publishDate |
2007 |
url |
https://www.vliz.be/imisdocs/publications/240021.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet North Atlantic North Atlantic oscillation |
genre_facet |
Greenland Ice Sheet North Atlantic North Atlantic oscillation |
op_source |
%3Ci%3ECryosphere+1%3C%2Fi%3E%3A+21-40.+%3Ca+href%3D%22http%3A%2F%2Fdx.doi.org%2F10.5194%2Ftc-1-21-2007%22+target%3D%22_blank%22%3Ehttp%3A%2F%2Fdx.doi.org%2F10.5194%2Ftc-1-21-2007%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000207505000003 info:eu-repo/semantics/altIdentifier/doi/oi.org/10.5194/tc-1-21-2007 https://www.vliz.be/imisdocs/publications/240021.pdf |
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 |
_version_ |
1766018087493042176 |