Sensitivity of the current Antarctic surface mass balance to sea surface conditions using MAR
peer reviewed Estimates for the recent period and projections of the Antarctic surface mass balance (SMB) often rely on high-resolution polar-oriented regional climate models (RCMs). However, RCMs require large-scale boundary forcing fields prescribed by reanalyses or general circulation models (GCM...
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Language: | English |
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Copernicus Group
2018
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Online Access: | https://orbi.uliege.be/handle/2268/229973 https://orbi.uliege.be/bitstream/2268/229973/1/tc-12-3827-2018.pdf https://doi.org/10.5194/tc-12-3827-2018 |
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ftorbi:oai:orbi.ulg.ac.be:2268/229973 2024-04-21T07:49:03+00:00 Sensitivity of the current Antarctic surface mass balance to sea surface conditions using MAR Kittel, Christoph Amory, Charles Agosta, Cécile Delhasse, Alison Doutreloup, Sébastien Huot, Pierre-Vincent Wyard, Coraline Fichefet, Thierry Fettweis, Xavier 2018-12-07 https://orbi.uliege.be/handle/2268/229973 https://orbi.uliege.be/bitstream/2268/229973/1/tc-12-3827-2018.pdf https://doi.org/10.5194/tc-12-3827-2018 en eng Copernicus Group https://www.the-cryosphere.net/12/3827/2018/ urn:issn:1994-0416 urn:issn:1994-0424 https://orbi.uliege.be/handle/2268/229973 info:hdl:2268/229973 https://orbi.uliege.be/bitstream/2268/229973/1/tc-12-3827-2018.pdf doi:10.5194/tc-12-3827-2018 scopus-id:2-s2.0-85058168403 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess The Cryosphere, 12, 3827–3839 (2018-12-07) Antarctic SMB Sea Surface Conditions 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 2018 ftorbi https://doi.org/10.5194/tc-12-3827-2018 2024-03-27T14:58:15Z peer reviewed Estimates for the recent period and projections of the Antarctic surface mass balance (SMB) often rely on high-resolution polar-oriented regional climate models (RCMs). However, RCMs require large-scale boundary forcing fields prescribed by reanalyses or general circulation models (GCMs). Since the recent variability of sea surface conditions (SSCs, namely sea ice concentration, SIC, and sea surface temperature, SST) over the Southern Ocean is not reproduced by most GCMs from the 5th phase of the Coupled Model Intercomparison Project (CMIP5), RCMs are then subject to potential biases. We investigate here the direct sensitivity of the Antarctic SMB to SSC perturbations around the Antarctic. With the RCM “Modèle Atmosphérique Régional” (MAR), different sensitivity experiments are performed over 1979–2015 by modifying the ERA-Interim SSCs with (i) homogeneous perturbations and (ii) mean anomalies estimated from all CMIP5 models and two extreme ones, while atmospheric lateral boundary conditions remained unchanged. Results show increased (decreased) precipitation due to perturbations inducing warmer, i.e. higher SST and lower SIC (colder, i.e. lower SST and higher SIC), SSCs than ERA-Interim, significantly affecting the SMB of coastal areas, as precipitation is mainly related to cyclones that do not penetrate far into the continent. At the continental scale, significant SMB anomalies (i.e greater than the interannual variability) are found for the largest combined SST/SIC perturbations. This is notably due to moisture anomalies above the ocean, reaching sufficiently high atmospheric levels to influence accumulation rates further inland. Sensitivity experiments with warmer SSCs based on the CMIP5 biases reveal integrated SMB anomalies (+5 % to +13 %) over the present climate (1979–2015) in the lower range of the SMB increase projected for the end of the 21st century. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Sea ice Southern Ocean The Cryosphere University of Liège: ORBi (Open Repository and Bibliography) The Cryosphere 12 12 3827 3839 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Antarctic SMB Sea Surface Conditions 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 |
Antarctic SMB Sea Surface Conditions Ice sheet Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Kittel, Christoph Amory, Charles Agosta, Cécile Delhasse, Alison Doutreloup, Sébastien Huot, Pierre-Vincent Wyard, Coraline Fichefet, Thierry Fettweis, Xavier Sensitivity of the current Antarctic surface mass balance to sea surface conditions using MAR |
topic_facet |
Antarctic SMB Sea Surface Conditions 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 Estimates for the recent period and projections of the Antarctic surface mass balance (SMB) often rely on high-resolution polar-oriented regional climate models (RCMs). However, RCMs require large-scale boundary forcing fields prescribed by reanalyses or general circulation models (GCMs). Since the recent variability of sea surface conditions (SSCs, namely sea ice concentration, SIC, and sea surface temperature, SST) over the Southern Ocean is not reproduced by most GCMs from the 5th phase of the Coupled Model Intercomparison Project (CMIP5), RCMs are then subject to potential biases. We investigate here the direct sensitivity of the Antarctic SMB to SSC perturbations around the Antarctic. With the RCM “Modèle Atmosphérique Régional” (MAR), different sensitivity experiments are performed over 1979–2015 by modifying the ERA-Interim SSCs with (i) homogeneous perturbations and (ii) mean anomalies estimated from all CMIP5 models and two extreme ones, while atmospheric lateral boundary conditions remained unchanged. Results show increased (decreased) precipitation due to perturbations inducing warmer, i.e. higher SST and lower SIC (colder, i.e. lower SST and higher SIC), SSCs than ERA-Interim, significantly affecting the SMB of coastal areas, as precipitation is mainly related to cyclones that do not penetrate far into the continent. At the continental scale, significant SMB anomalies (i.e greater than the interannual variability) are found for the largest combined SST/SIC perturbations. This is notably due to moisture anomalies above the ocean, reaching sufficiently high atmospheric levels to influence accumulation rates further inland. Sensitivity experiments with warmer SSCs based on the CMIP5 biases reveal integrated SMB anomalies (+5 % to +13 %) over the present climate (1979–2015) in the lower range of the SMB increase projected for the end of the 21st century. |
format |
Article in Journal/Newspaper |
author |
Kittel, Christoph Amory, Charles Agosta, Cécile Delhasse, Alison Doutreloup, Sébastien Huot, Pierre-Vincent Wyard, Coraline Fichefet, Thierry Fettweis, Xavier |
author_facet |
Kittel, Christoph Amory, Charles Agosta, Cécile Delhasse, Alison Doutreloup, Sébastien Huot, Pierre-Vincent Wyard, Coraline Fichefet, Thierry Fettweis, Xavier |
author_sort |
Kittel, Christoph |
title |
Sensitivity of the current Antarctic surface mass balance to sea surface conditions using MAR |
title_short |
Sensitivity of the current Antarctic surface mass balance to sea surface conditions using MAR |
title_full |
Sensitivity of the current Antarctic surface mass balance to sea surface conditions using MAR |
title_fullStr |
Sensitivity of the current Antarctic surface mass balance to sea surface conditions using MAR |
title_full_unstemmed |
Sensitivity of the current Antarctic surface mass balance to sea surface conditions using MAR |
title_sort |
sensitivity of the current antarctic surface mass balance to sea surface conditions using mar |
publisher |
Copernicus Group |
publishDate |
2018 |
url |
https://orbi.uliege.be/handle/2268/229973 https://orbi.uliege.be/bitstream/2268/229973/1/tc-12-3827-2018.pdf https://doi.org/10.5194/tc-12-3827-2018 |
genre |
Antarc* Antarctic Ice Sheet Sea ice Southern Ocean The Cryosphere |
genre_facet |
Antarc* Antarctic Ice Sheet Sea ice Southern Ocean The Cryosphere |
op_source |
The Cryosphere, 12, 3827–3839 (2018-12-07) |
op_relation |
https://www.the-cryosphere.net/12/3827/2018/ urn:issn:1994-0416 urn:issn:1994-0424 https://orbi.uliege.be/handle/2268/229973 info:hdl:2268/229973 https://orbi.uliege.be/bitstream/2268/229973/1/tc-12-3827-2018.pdf doi:10.5194/tc-12-3827-2018 scopus-id:2-s2.0-85058168403 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-12-3827-2018 |
container_title |
The Cryosphere |
container_volume |
12 |
container_issue |
12 |
container_start_page |
3827 |
op_container_end_page |
3839 |
_version_ |
1796952893728751616 |