Sensitivity of the current Antarctic surface mass balance to sea surface conditions using MAR
International audience 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 mo...
Published in: | The Cryosphere |
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ftinsu:oai:HAL:insu-03721854v1 2024-04-28T08:02:07+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 Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) 2018 https://insu.hal.science/insu-03721854 https://insu.hal.science/insu-03721854/document https://insu.hal.science/insu-03721854/file/tc-12-3827-2018.pdf https://doi.org/10.5194/tc-12-3827-2018 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-12-3827-2018 insu-03721854 https://insu.hal.science/insu-03721854 https://insu.hal.science/insu-03721854/document https://insu.hal.science/insu-03721854/file/tc-12-3827-2018.pdf BIBCODE: 2018TCry.12.3827K doi:10.5194/tc-12-3827-2018 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://insu.hal.science/insu-03721854 The Cryosphere, 2018, 12, pp.3827-3839. ⟨10.5194/tc-12-3827-2018⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2018 ftinsu https://doi.org/10.5194/tc-12-3827-2018 2024-04-05T00:32:43Z International audience 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 Sea ice Southern Ocean The Cryosphere Institut national des sciences de l'Univers: HAL-INSU The Cryosphere 12 12 3827 3839 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] 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 |
[SDU]Sciences of the Universe [physics] |
description |
International audience 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. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) |
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 |
HAL CCSD |
publishDate |
2018 |
url |
https://insu.hal.science/insu-03721854 https://insu.hal.science/insu-03721854/document https://insu.hal.science/insu-03721854/file/tc-12-3827-2018.pdf https://doi.org/10.5194/tc-12-3827-2018 |
genre |
Antarc* Antarctic Sea ice Southern Ocean The Cryosphere |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean The Cryosphere |
op_source |
ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://insu.hal.science/insu-03721854 The Cryosphere, 2018, 12, pp.3827-3839. ⟨10.5194/tc-12-3827-2018⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-12-3827-2018 insu-03721854 https://insu.hal.science/insu-03721854 https://insu.hal.science/insu-03721854/document https://insu.hal.science/insu-03721854/file/tc-12-3827-2018.pdf BIBCODE: 2018TCry.12.3827K doi:10.5194/tc-12-3827-2018 |
op_rights |
http://creativecommons.org/licenses/by/ 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 |
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1797573582406025216 |