A model reconstruction of the Antarctic sea ice thickness and volume changes over 1980-2008 using data assimilation
International audience Sea ice variability in the Southern Ocean has a complex spatio-temporal structure. In a global warming context, the Antarctic sea ice cover has slightly expanded over the recent decades. This increase in sea ice extent results, however, from the sum of positive and negative re...
Published in: | Ocean Modelling |
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Main Authors: | , , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2013
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Online Access: | https://hal.science/hal-00912619 https://doi.org/10.1016/J.OCEMOD.2013.01.003 |
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École Polytechnique, Université Paris-Saclay: HAL |
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English |
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[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes Massonnet, François Mathiot, Pierre Fichefet, Thierry Goosse, Hugues König Beatty, Christof Vancoppenolle, Martin Lavergne, Thomas A model reconstruction of the Antarctic sea ice thickness and volume changes over 1980-2008 using data assimilation |
topic_facet |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience Sea ice variability in the Southern Ocean has a complex spatio-temporal structure. In a global warming context, the Antarctic sea ice cover has slightly expanded over the recent decades. This increase in sea ice extent results, however, from the sum of positive and negative regional trends and is influenced by a wide range of modes of climate variability. An additional view on sea ice thickness and volume changes would improve our understanding. Still, no large-scale multi-decadal well-sampled record of Antarctic sea ice thickness exists to date. To address this issue, we assimilate real sea ice concentration data into the ocean-sea ice model NEMO-LIM2 using an ensemble Kalman filter and demonstrate the positive impacts on the global sea ice cover. This paper reports the 1980-2008 evolution (monthly anomalies, trends plus their uncertainty ranges) of sea ice volume and thickness in different sectors of the Southern Ocean. We find that the global Antarctic sea ice volume has risen at a pace of 355±338 km 3 /decade (5.6±5.3%/decade) during this period, with an increase in the Ross and Weddell Seas (150±124 and 209±362 km 3 /decade, respectively) and a decrease in the Amundsen-Bellingshausen Seas (-45±54 km 3 /decade). Sea ice volume anomalies co-vary well with extent anomalies, and exhibit yearly to decadal fluctuations. The results stress the need to analyze sea ice changes at the regional level first and then at the hemispheric level. |
author2 |
Institut d'Astronomie et de Géophysique Georges Lemaître (UCL-ASTR) Université Catholique de Louvain = Catholic University of Louvain (UCL) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Massonnet, François Mathiot, Pierre Fichefet, Thierry Goosse, Hugues König Beatty, Christof Vancoppenolle, Martin Lavergne, Thomas |
author_facet |
Massonnet, François Mathiot, Pierre Fichefet, Thierry Goosse, Hugues König Beatty, Christof Vancoppenolle, Martin Lavergne, Thomas |
author_sort |
Massonnet, François |
title |
A model reconstruction of the Antarctic sea ice thickness and volume changes over 1980-2008 using data assimilation |
title_short |
A model reconstruction of the Antarctic sea ice thickness and volume changes over 1980-2008 using data assimilation |
title_full |
A model reconstruction of the Antarctic sea ice thickness and volume changes over 1980-2008 using data assimilation |
title_fullStr |
A model reconstruction of the Antarctic sea ice thickness and volume changes over 1980-2008 using data assimilation |
title_full_unstemmed |
A model reconstruction of the Antarctic sea ice thickness and volume changes over 1980-2008 using data assimilation |
title_sort |
model reconstruction of the antarctic sea ice thickness and volume changes over 1980-2008 using data assimilation |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.science/hal-00912619 https://doi.org/10.1016/J.OCEMOD.2013.01.003 |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_source |
ISSN: 1463-5003 Ocean Modelling https://hal.science/hal-00912619 Ocean Modelling, 2013, 64, pp.67-75. ⟨10.1016/J.OCEMOD.2013.01.003⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/J.OCEMOD.2013.01.003 hal-00912619 https://hal.science/hal-00912619 BIBCODE: 2013OcMod.64.67M doi:10.1016/J.OCEMOD.2013.01.003 |
op_doi |
https://doi.org/10.1016/J.OCEMOD.2013.01.003 |
container_title |
Ocean Modelling |
container_volume |
64 |
container_start_page |
67 |
op_container_end_page |
75 |
_version_ |
1799482713432915968 |
spelling |
ftepunivpsaclay:oai:HAL:hal-00912619v1 2024-05-19T07:29:58+00:00 A model reconstruction of the Antarctic sea ice thickness and volume changes over 1980-2008 using data assimilation Massonnet, François Mathiot, Pierre Fichefet, Thierry Goosse, Hugues König Beatty, Christof Vancoppenolle, Martin Lavergne, Thomas Institut d'Astronomie et de Géophysique Georges Lemaître (UCL-ASTR) Université Catholique de Louvain = Catholic University of Louvain (UCL) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 2013-04 https://hal.science/hal-00912619 https://doi.org/10.1016/J.OCEMOD.2013.01.003 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/J.OCEMOD.2013.01.003 hal-00912619 https://hal.science/hal-00912619 BIBCODE: 2013OcMod.64.67M doi:10.1016/J.OCEMOD.2013.01.003 ISSN: 1463-5003 Ocean Modelling https://hal.science/hal-00912619 Ocean Modelling, 2013, 64, pp.67-75. ⟨10.1016/J.OCEMOD.2013.01.003⟩ [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2013 ftepunivpsaclay https://doi.org/10.1016/J.OCEMOD.2013.01.003 2024-05-01T23:59:41Z International audience Sea ice variability in the Southern Ocean has a complex spatio-temporal structure. In a global warming context, the Antarctic sea ice cover has slightly expanded over the recent decades. This increase in sea ice extent results, however, from the sum of positive and negative regional trends and is influenced by a wide range of modes of climate variability. An additional view on sea ice thickness and volume changes would improve our understanding. Still, no large-scale multi-decadal well-sampled record of Antarctic sea ice thickness exists to date. To address this issue, we assimilate real sea ice concentration data into the ocean-sea ice model NEMO-LIM2 using an ensemble Kalman filter and demonstrate the positive impacts on the global sea ice cover. This paper reports the 1980-2008 evolution (monthly anomalies, trends plus their uncertainty ranges) of sea ice volume and thickness in different sectors of the Southern Ocean. We find that the global Antarctic sea ice volume has risen at a pace of 355±338 km 3 /decade (5.6±5.3%/decade) during this period, with an increase in the Ross and Weddell Seas (150±124 and 209±362 km 3 /decade, respectively) and a decrease in the Amundsen-Bellingshausen Seas (-45±54 km 3 /decade). Sea ice volume anomalies co-vary well with extent anomalies, and exhibit yearly to decadal fluctuations. The results stress the need to analyze sea ice changes at the regional level first and then at the hemispheric level. Article in Journal/Newspaper Antarc* Antarctic Sea ice Southern Ocean École Polytechnique, Université Paris-Saclay: HAL Ocean Modelling 64 67 75 |