Spatial distribution of accumulation in the Adélie Land - Comparison of the Antarctic GLACIOCLIM-SAMBA observation data with remote sensing techniques and high-resolution climate models
The Surface Mass Balance (SMB) of Antarctica is typically much larger within the first 200 km from the coast than further inland. This is also likely where much of the SMB change is expected due to climate warming. That is why since 2004 the GLACIOCLIM- SAMBA French observatory monitors the SMB in t...
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ftorbi:oai:orbi.ulg.ac.be:2268/145123 2024-04-21T07:48:32+00:00 Spatial distribution of accumulation in the Adélie Land - Comparison of the Antarctic GLACIOCLIM-SAMBA observation data with remote sensing techniques and high-resolution climate models Agosta, Cécile Genthon, Christophe Favier, Vincent Gallée, Hubert Krinner, Gerhard Picard, Ghislain Six, Delphine 2009-07 https://orbi.uliege.be/handle/2268/145123 https://orbi.uliege.be/bitstream/2268/145123/1/MOCA09_Agosta.ppt en eng https://orbi.uliege.be/handle/2268/145123 info:hdl:2268/145123 https://orbi.uliege.be/bitstream/2268/145123/1/MOCA09_Agosta.ppt open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess MOCA-09 IAMAS-IAPSOS-IACS Joint Assembly, Montréal, Canada [CA], du 20 au 29 juillet 2009 Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique conference paper not in proceedings http://purl.org/coar/resource_type/c_18cp info:eu-repo/semantics/conferencePaper 2009 ftorbi 2024-03-27T14:45:02Z The Surface Mass Balance (SMB) of Antarctica is typically much larger within the first 200 km from the coast than further inland. This is also likely where much of the SMB change is expected due to climate warming. That is why since 2004 the GLACIOCLIM- SAMBA French observatory monitors the SMB in this region with spatial scales resolving those of climate models. A stakes line made of 91 stakes was deployed along a 150 km transect from the coast of Adélie Land towards Dome C on the plateau. This transect is surveyed each year and 3 complete records are now available. We first compare recent SMB measurements with older reports from the 1972-1992 period. We show that a significant fraction of the observed kilometer-scale spatial variability is stationary with time. Moreover the large spatial and inter-annual variabilities of recent measurements are consistent with the historical ones. The lateral spatial significance of the transect is then evaluated using the background remote-sensing- based model of Arthern et al. (2006). Finally, results from 3 high-resolution climate models are presented and compared with the field reports: the global atmosphere-surface climate model LMDZ4 zoomed to reach a 35 km resolution over Antarctica, the regional atmospheric climate model MAR developed for polar regions (20 km resolution) and the ECMWF analysis (50 km resolution). We show large differences between the 3 models, which don’t have the same ability to reproduce the meso-scale characteristics of the distribution of the observed SMB in the critical coast-to-plateau area. Conference Object Antarc* Antarctic Antarctica University of Liège: ORBi (Open Repository and Bibliography) |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Agosta, Cécile Genthon, Christophe Favier, Vincent Gallée, Hubert Krinner, Gerhard Picard, Ghislain Six, Delphine Spatial distribution of accumulation in the Adélie Land - Comparison of the Antarctic GLACIOCLIM-SAMBA observation data with remote sensing techniques and high-resolution climate models |
topic_facet |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
description |
The Surface Mass Balance (SMB) of Antarctica is typically much larger within the first 200 km from the coast than further inland. This is also likely where much of the SMB change is expected due to climate warming. That is why since 2004 the GLACIOCLIM- SAMBA French observatory monitors the SMB in this region with spatial scales resolving those of climate models. A stakes line made of 91 stakes was deployed along a 150 km transect from the coast of Adélie Land towards Dome C on the plateau. This transect is surveyed each year and 3 complete records are now available. We first compare recent SMB measurements with older reports from the 1972-1992 period. We show that a significant fraction of the observed kilometer-scale spatial variability is stationary with time. Moreover the large spatial and inter-annual variabilities of recent measurements are consistent with the historical ones. The lateral spatial significance of the transect is then evaluated using the background remote-sensing- based model of Arthern et al. (2006). Finally, results from 3 high-resolution climate models are presented and compared with the field reports: the global atmosphere-surface climate model LMDZ4 zoomed to reach a 35 km resolution over Antarctica, the regional atmospheric climate model MAR developed for polar regions (20 km resolution) and the ECMWF analysis (50 km resolution). We show large differences between the 3 models, which don’t have the same ability to reproduce the meso-scale characteristics of the distribution of the observed SMB in the critical coast-to-plateau area. |
format |
Conference Object |
author |
Agosta, Cécile Genthon, Christophe Favier, Vincent Gallée, Hubert Krinner, Gerhard Picard, Ghislain Six, Delphine |
author_facet |
Agosta, Cécile Genthon, Christophe Favier, Vincent Gallée, Hubert Krinner, Gerhard Picard, Ghislain Six, Delphine |
author_sort |
Agosta, Cécile |
title |
Spatial distribution of accumulation in the Adélie Land - Comparison of the Antarctic GLACIOCLIM-SAMBA observation data with remote sensing techniques and high-resolution climate models |
title_short |
Spatial distribution of accumulation in the Adélie Land - Comparison of the Antarctic GLACIOCLIM-SAMBA observation data with remote sensing techniques and high-resolution climate models |
title_full |
Spatial distribution of accumulation in the Adélie Land - Comparison of the Antarctic GLACIOCLIM-SAMBA observation data with remote sensing techniques and high-resolution climate models |
title_fullStr |
Spatial distribution of accumulation in the Adélie Land - Comparison of the Antarctic GLACIOCLIM-SAMBA observation data with remote sensing techniques and high-resolution climate models |
title_full_unstemmed |
Spatial distribution of accumulation in the Adélie Land - Comparison of the Antarctic GLACIOCLIM-SAMBA observation data with remote sensing techniques and high-resolution climate models |
title_sort |
spatial distribution of accumulation in the adélie land - comparison of the antarctic glacioclim-samba observation data with remote sensing techniques and high-resolution climate models |
publishDate |
2009 |
url |
https://orbi.uliege.be/handle/2268/145123 https://orbi.uliege.be/bitstream/2268/145123/1/MOCA09_Agosta.ppt |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
MOCA-09 IAMAS-IAPSOS-IACS Joint Assembly, Montréal, Canada [CA], du 20 au 29 juillet 2009 |
op_relation |
https://orbi.uliege.be/handle/2268/145123 info:hdl:2268/145123 https://orbi.uliege.be/bitstream/2268/145123/1/MOCA09_Agosta.ppt |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
_version_ |
1796950164098777088 |