High-resolution modelling of the Antarctic surface mass balance, application for the twentieth, twenty first and twenty second centuries
peer reviewed About 75% of the Antarctic surface mass gain occurs over areas below 2000 m asl, which cover 40% of the grounded ice-sheet. As the topography is complex in many of these regions, SMB modelling is highly dependent on resolution, and studying the impact of Antarctica on the future rise i...
Published in: | Climate Dynamics |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Springer Science & Business Media B.V.
2013
|
Subjects: | |
Online Access: | https://orbi.uliege.be/handle/2268/143909 https://doi.org/10.1007/s00382-013-1903-9 |
id |
ftorbi:oai:orbi.ulg.ac.be:2268/143909 |
---|---|
record_format |
openpolar |
spelling |
ftorbi:oai:orbi.ulg.ac.be:2268/143909 2024-10-13T14:02:45+00:00 High-resolution modelling of the Antarctic surface mass balance, application for the twentieth, twenty first and twenty second centuries Agosta, Cécile Favier, Vincent Krinner, Gerhard Gallée, Hubert Fettweis, Xavier Genthon, Christophe 2013-12 https://orbi.uliege.be/handle/2268/143909 https://doi.org/10.1007/s00382-013-1903-9 en eng Springer Science & Business Media B.V. info:eu-repo/grantAgreement/EC/FP7/226375 urn:issn:0930-7575 urn:issn:1432-0894 https://orbi.uliege.be/handle/2268/143909 info:hdl:2268/143909 restricted access http://purl.org/coar/access_right/c_16ec info:eu-repo/semantics/restrictedAccess Climate Dynamics, 41 (11-12), 3247-3260 (2013-12) Downscaling surface mass balance surface energy balance Orographic precipitation Antarctica Sea-level Climate-change ice-sheet Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2013 ftorbi https://doi.org/10.1007/s00382-013-1903-9 2024-09-27T07:01:57Z peer reviewed About 75% of the Antarctic surface mass gain occurs over areas below 2000 m asl, which cover 40% of the grounded ice-sheet. As the topography is complex in many of these regions, SMB modelling is highly dependent on resolution, and studying the impact of Antarctica on the future rise in sea level requires physical approaches. We have developed a low time consuming, physical downscaling model for high-resolution (15 km) long-term surface mass balance (SMB) projections. Here, we present results of this model, called SMHiL (surface mass balance high-resolution downscaling), which was forced with the LMDZ4 atmospheric general circulation model to assess SMB variation in the 21st and the 22nd centuries under two different scenarios. The higher resolution of SMHiL better reproduces the geographical patterns of SMB and increase significantly the averaged SMB over the grounded ice-sheet for the end of the 20th century. A comparison with more than 3200 quality-controlled field data shows that LMDZ4 and SMHiL compare the observed values equally well. Nevertheless, field data below 2000 m asl are too scarce to efficiency show the interest of SMHiL and measuring the SMB in these undocumented areas should be then a future scientific priority. Our results suggest that running LMDZ4 at a finer resolution (15km) may give a future increase in SMB in Antarctica about 30% higher than by using its standard resolution (60 km) due to higher increase in precipitation in the coastal areas at 15 km. However, a part (~ 15%) of these discrepancies could be an artefact from SMHiL since it neglects the foehn effect and then likely overestimates the precipitation increase. Future changes in the Antarctic SMB at low elevations will result from the conflict between higher snow accumulation and runoff. For this reason, developing downscaling models is crucial to represent processes in sufficient detail and correctly model the SMB in the coastal areas. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet University of Liège: ORBi (Open Repository and Bibliography) Antarctic The Antarctic Climate Dynamics 41 11-12 3247 3260 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Downscaling surface mass balance surface energy balance Orographic precipitation Antarctica Sea-level Climate-change ice-sheet Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
Downscaling surface mass balance surface energy balance Orographic precipitation Antarctica Sea-level Climate-change ice-sheet Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Agosta, Cécile Favier, Vincent Krinner, Gerhard Gallée, Hubert Fettweis, Xavier Genthon, Christophe High-resolution modelling of the Antarctic surface mass balance, application for the twentieth, twenty first and twenty second centuries |
topic_facet |
Downscaling surface mass balance surface energy balance Orographic precipitation Antarctica Sea-level Climate-change ice-sheet Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
description |
peer reviewed About 75% of the Antarctic surface mass gain occurs over areas below 2000 m asl, which cover 40% of the grounded ice-sheet. As the topography is complex in many of these regions, SMB modelling is highly dependent on resolution, and studying the impact of Antarctica on the future rise in sea level requires physical approaches. We have developed a low time consuming, physical downscaling model for high-resolution (15 km) long-term surface mass balance (SMB) projections. Here, we present results of this model, called SMHiL (surface mass balance high-resolution downscaling), which was forced with the LMDZ4 atmospheric general circulation model to assess SMB variation in the 21st and the 22nd centuries under two different scenarios. The higher resolution of SMHiL better reproduces the geographical patterns of SMB and increase significantly the averaged SMB over the grounded ice-sheet for the end of the 20th century. A comparison with more than 3200 quality-controlled field data shows that LMDZ4 and SMHiL compare the observed values equally well. Nevertheless, field data below 2000 m asl are too scarce to efficiency show the interest of SMHiL and measuring the SMB in these undocumented areas should be then a future scientific priority. Our results suggest that running LMDZ4 at a finer resolution (15km) may give a future increase in SMB in Antarctica about 30% higher than by using its standard resolution (60 km) due to higher increase in precipitation in the coastal areas at 15 km. However, a part (~ 15%) of these discrepancies could be an artefact from SMHiL since it neglects the foehn effect and then likely overestimates the precipitation increase. Future changes in the Antarctic SMB at low elevations will result from the conflict between higher snow accumulation and runoff. For this reason, developing downscaling models is crucial to represent processes in sufficient detail and correctly model the SMB in the coastal areas. |
format |
Article in Journal/Newspaper |
author |
Agosta, Cécile Favier, Vincent Krinner, Gerhard Gallée, Hubert Fettweis, Xavier Genthon, Christophe |
author_facet |
Agosta, Cécile Favier, Vincent Krinner, Gerhard Gallée, Hubert Fettweis, Xavier Genthon, Christophe |
author_sort |
Agosta, Cécile |
title |
High-resolution modelling of the Antarctic surface mass balance, application for the twentieth, twenty first and twenty second centuries |
title_short |
High-resolution modelling of the Antarctic surface mass balance, application for the twentieth, twenty first and twenty second centuries |
title_full |
High-resolution modelling of the Antarctic surface mass balance, application for the twentieth, twenty first and twenty second centuries |
title_fullStr |
High-resolution modelling of the Antarctic surface mass balance, application for the twentieth, twenty first and twenty second centuries |
title_full_unstemmed |
High-resolution modelling of the Antarctic surface mass balance, application for the twentieth, twenty first and twenty second centuries |
title_sort |
high-resolution modelling of the antarctic surface mass balance, application for the twentieth, twenty first and twenty second centuries |
publisher |
Springer Science & Business Media B.V. |
publishDate |
2013 |
url |
https://orbi.uliege.be/handle/2268/143909 https://doi.org/10.1007/s00382-013-1903-9 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet |
op_source |
Climate Dynamics, 41 (11-12), 3247-3260 (2013-12) |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/226375 urn:issn:0930-7575 urn:issn:1432-0894 https://orbi.uliege.be/handle/2268/143909 info:hdl:2268/143909 |
op_rights |
restricted access http://purl.org/coar/access_right/c_16ec info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1007/s00382-013-1903-9 |
container_title |
Climate Dynamics |
container_volume |
41 |
container_issue |
11-12 |
container_start_page |
3247 |
op_container_end_page |
3260 |
_version_ |
1812819223154524160 |