The 1988-2003 Greenland ice sheet melt extent using passive microwave satellite data and a regional climate model
Measurements from ETH-Camp and JAR1 AWS (West Greenland) as well as coupled atmosphere-snow regional climate simulations have highlighted flaws in the cross-polarized gradient ratio (XPGR) technique used to identify melt from passive microwave satellite data. It was found that dense clouds (causing...
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ftunistlouisbrus:oai:dial.uclouvain.be:boreal:38287 2024-05-12T08:04:24+00:00 The 1988-2003 Greenland ice sheet melt extent using passive microwave satellite data and a regional climate model Fettweis, Xavier Gallee, Hubert Lefebre, Filip van Ypersele de Strihou, Jean-Pascal UCL - SC/PHYS - Département de physique 2006 http://hdl.handle.net/2078.1/38287 https://doi.org/10.1007/s00382-006-0150-8 eng eng Springer boreal:38287 http://hdl.handle.net/2078.1/38287 doi:10.1007/s00382-006-0150-8 urn:ISSN:0930-7575 urn:EISSN:1432-0894 info:eu-repo/semantics/restrictedAccess Climate Dynamics : observational, theoretical and computational research on the climate system, Vol. 27, no. 5, p. 531-541 (2006) info:eu-repo/semantics/article 2006 ftunistlouisbrus https://doi.org/10.1007/s00382-006-0150-8 2024-04-18T18:15:31Z Measurements from ETH-Camp and JAR1 AWS (West Greenland) as well as coupled atmosphere-snow regional climate simulations have highlighted flaws in the cross-polarized gradient ratio (XPGR) technique used to identify melt from passive microwave satellite data. It was found that dense clouds (causing notably rainfall) on the ice sheet severely perturb the XPGR melt signal. Therefore, the original XPGR melt detection algorithm has been adapted to better incorporate atmospheric variability over the ice sheet and an updated melt trend for the 1988-2003 period has been calculated. Compared to the original algorithm, the melt zone area increase is eight times higher (from 0.2 to 1.7% year(-1)). The increase is higher with the improved XPGR technique because rainfall also increased during this period. It is correlated to higher atmospheric temperatures. Finally, the model shows that the total ice sheet runoff is directly proportional to the melt extent surface detected by satellites. These results are important for the understanding of the effect of Greenland melting on the stability of the thermohaline circulation. Article in Journal/Newspaper Greenland Ice Sheet DIAL@USL-B (Université Saint-Louis, Bruxelles) Greenland Climate Dynamics 27 5 531 541 |
institution |
Open Polar |
collection |
DIAL@USL-B (Université Saint-Louis, Bruxelles) |
op_collection_id |
ftunistlouisbrus |
language |
English |
description |
Measurements from ETH-Camp and JAR1 AWS (West Greenland) as well as coupled atmosphere-snow regional climate simulations have highlighted flaws in the cross-polarized gradient ratio (XPGR) technique used to identify melt from passive microwave satellite data. It was found that dense clouds (causing notably rainfall) on the ice sheet severely perturb the XPGR melt signal. Therefore, the original XPGR melt detection algorithm has been adapted to better incorporate atmospheric variability over the ice sheet and an updated melt trend for the 1988-2003 period has been calculated. Compared to the original algorithm, the melt zone area increase is eight times higher (from 0.2 to 1.7% year(-1)). The increase is higher with the improved XPGR technique because rainfall also increased during this period. It is correlated to higher atmospheric temperatures. Finally, the model shows that the total ice sheet runoff is directly proportional to the melt extent surface detected by satellites. These results are important for the understanding of the effect of Greenland melting on the stability of the thermohaline circulation. |
author2 |
UCL - SC/PHYS - Département de physique |
format |
Article in Journal/Newspaper |
author |
Fettweis, Xavier Gallee, Hubert Lefebre, Filip van Ypersele de Strihou, Jean-Pascal |
spellingShingle |
Fettweis, Xavier Gallee, Hubert Lefebre, Filip van Ypersele de Strihou, Jean-Pascal The 1988-2003 Greenland ice sheet melt extent using passive microwave satellite data and a regional climate model |
author_facet |
Fettweis, Xavier Gallee, Hubert Lefebre, Filip van Ypersele de Strihou, Jean-Pascal |
author_sort |
Fettweis, Xavier |
title |
The 1988-2003 Greenland ice sheet melt extent using passive microwave satellite data and a regional climate model |
title_short |
The 1988-2003 Greenland ice sheet melt extent using passive microwave satellite data and a regional climate model |
title_full |
The 1988-2003 Greenland ice sheet melt extent using passive microwave satellite data and a regional climate model |
title_fullStr |
The 1988-2003 Greenland ice sheet melt extent using passive microwave satellite data and a regional climate model |
title_full_unstemmed |
The 1988-2003 Greenland ice sheet melt extent using passive microwave satellite data and a regional climate model |
title_sort |
1988-2003 greenland ice sheet melt extent using passive microwave satellite data and a regional climate model |
publisher |
Springer |
publishDate |
2006 |
url |
http://hdl.handle.net/2078.1/38287 https://doi.org/10.1007/s00382-006-0150-8 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
Climate Dynamics : observational, theoretical and computational research on the climate system, Vol. 27, no. 5, p. 531-541 (2006) |
op_relation |
boreal:38287 http://hdl.handle.net/2078.1/38287 doi:10.1007/s00382-006-0150-8 urn:ISSN:0930-7575 urn:EISSN:1432-0894 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1007/s00382-006-0150-8 |
container_title |
Climate Dynamics |
container_volume |
27 |
container_issue |
5 |
container_start_page |
531 |
op_container_end_page |
541 |
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1798846590013669376 |