Drivers and Reversibility of Abrupt Ocean State Transitions in the Amundsen Sea, Antarctica
International audience The West Antarctic Ice Sheet has lost mass over the last few decades and has thus contributed significantly to global sea level rise. Warming of the oceanic sub-surface seems to have caused an increase in melting under floating ice shelves, particularly in the Amundsen Sea (Je...
Published in: | Journal of Geophysical Research: Oceans |
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Online Access: | https://hal.science/hal-04301354 https://hal.science/hal-04301354/document https://hal.science/hal-04301354/file/caillet_JGR_2023.pdf https://doi.org/10.1029/2022jc018929 |
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ftunigrenoble:oai:HAL:hal-04301354v1 2024-04-14T08:00:50+00:00 Drivers and Reversibility of Abrupt Ocean State Transitions in the Amundsen Sea, Antarctica Caillet, Justine Jourdain, Nicolas, C Mathiot, Pierre Hellmer, Hartmut, H Mouginot, Jérémie Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) Institut de gestion des entreprises -USJ (IGE) Université Saint-Joseph de Beyrouth (USJ) Alfred Wegener Institute for Polar and Marine Research (AWI) ANR-19-CE01-0015,EIS,Elmer/Ice-Sheet : un modèle dédié à l'étude des changements rapides de calottes polaires(2019) European Project: 820575,TiPACCs 2022 https://hal.science/hal-04301354 https://hal.science/hal-04301354/document https://hal.science/hal-04301354/file/caillet_JGR_2023.pdf https://doi.org/10.1029/2022jc018929 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1029/2022jc018929 info:eu-repo/grantAgreement//820575/EU/Tipping Points in Antarctic Climate Components/TiPACCs hal-04301354 https://hal.science/hal-04301354 https://hal.science/hal-04301354/document https://hal.science/hal-04301354/file/caillet_JGR_2023.pdf doi:10.1029/2022jc018929 info:eu-repo/semantics/OpenAccess ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-04301354 Journal of Geophysical Research. Oceans, 2022, 128 (1), pp.e2022JC018929. ⟨10.1029/2022jc018929⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2022 ftunigrenoble https://doi.org/10.1029/2022jc018929 2024-03-21T16:09:22Z International audience The West Antarctic Ice Sheet has lost mass over the last few decades and has thus contributed significantly to global sea level rise. Warming of the oceanic sub-surface seems to have caused an increase in melting under floating ice shelves, particularly in the Amundsen Sea (Jenkins et al., 2018). Depending on the bedrock slope direction (Pattyn et al., 2012; Schoof, 2007) and ice-shelf lateral buttressing (Gudmundsson, 2013), a sufficiently strong and persistent increase in basal melting can lead to a marine ice-sheet instability (MISI), resulting in a self-sustained retreat of the glacier's grounding line and to the acceleration of its flow (Favier et al., 2014; Joughin et al., 2014). Instabilities are triggered above a certain level of ocean warming (critical threshold or tipping point), with the possible existence of multiple thresholds. Thus, Rosier et al. (2021) estimated that Pine Island Glacier would undergo a MISI and major mass loss for an oceanic warming of +1.2°C relative to the present. Garbe et al. (2020) estimated that a tipping point of +2°C global warming relative to preindustrial could cause a MISI of the entire Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Ice Shelves Pine Island Pine Island Glacier Université Grenoble Alpes: HAL Amundsen Sea Antarctic Misi ENVELOPE(26.683,26.683,66.617,66.617) Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) West Antarctic Ice Sheet Journal of Geophysical Research: Oceans 128 1 |
institution |
Open Polar |
collection |
Université Grenoble Alpes: HAL |
op_collection_id |
ftunigrenoble |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Caillet, Justine Jourdain, Nicolas, C Mathiot, Pierre Hellmer, Hartmut, H Mouginot, Jérémie Drivers and Reversibility of Abrupt Ocean State Transitions in the Amundsen Sea, Antarctica |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience The West Antarctic Ice Sheet has lost mass over the last few decades and has thus contributed significantly to global sea level rise. Warming of the oceanic sub-surface seems to have caused an increase in melting under floating ice shelves, particularly in the Amundsen Sea (Jenkins et al., 2018). Depending on the bedrock slope direction (Pattyn et al., 2012; Schoof, 2007) and ice-shelf lateral buttressing (Gudmundsson, 2013), a sufficiently strong and persistent increase in basal melting can lead to a marine ice-sheet instability (MISI), resulting in a self-sustained retreat of the glacier's grounding line and to the acceleration of its flow (Favier et al., 2014; Joughin et al., 2014). Instabilities are triggered above a certain level of ocean warming (critical threshold or tipping point), with the possible existence of multiple thresholds. Thus, Rosier et al. (2021) estimated that Pine Island Glacier would undergo a MISI and major mass loss for an oceanic warming of +1.2°C relative to the present. Garbe et al. (2020) estimated that a tipping point of +2°C global warming relative to preindustrial could cause a MISI of the entire |
author2 |
Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) Institut de gestion des entreprises -USJ (IGE) Université Saint-Joseph de Beyrouth (USJ) Alfred Wegener Institute for Polar and Marine Research (AWI) ANR-19-CE01-0015,EIS,Elmer/Ice-Sheet : un modèle dédié à l'étude des changements rapides de calottes polaires(2019) European Project: 820575,TiPACCs |
format |
Article in Journal/Newspaper |
author |
Caillet, Justine Jourdain, Nicolas, C Mathiot, Pierre Hellmer, Hartmut, H Mouginot, Jérémie |
author_facet |
Caillet, Justine Jourdain, Nicolas, C Mathiot, Pierre Hellmer, Hartmut, H Mouginot, Jérémie |
author_sort |
Caillet, Justine |
title |
Drivers and Reversibility of Abrupt Ocean State Transitions in the Amundsen Sea, Antarctica |
title_short |
Drivers and Reversibility of Abrupt Ocean State Transitions in the Amundsen Sea, Antarctica |
title_full |
Drivers and Reversibility of Abrupt Ocean State Transitions in the Amundsen Sea, Antarctica |
title_fullStr |
Drivers and Reversibility of Abrupt Ocean State Transitions in the Amundsen Sea, Antarctica |
title_full_unstemmed |
Drivers and Reversibility of Abrupt Ocean State Transitions in the Amundsen Sea, Antarctica |
title_sort |
drivers and reversibility of abrupt ocean state transitions in the amundsen sea, antarctica |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.science/hal-04301354 https://hal.science/hal-04301354/document https://hal.science/hal-04301354/file/caillet_JGR_2023.pdf https://doi.org/10.1029/2022jc018929 |
long_lat |
ENVELOPE(26.683,26.683,66.617,66.617) ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Amundsen Sea Antarctic Misi Pine Island Glacier West Antarctic Ice Sheet |
geographic_facet |
Amundsen Sea Antarctic Misi Pine Island Glacier West Antarctic Ice Sheet |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Ice Shelves Pine Island Pine Island Glacier |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Ice Shelves Pine Island Pine Island Glacier |
op_source |
ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-04301354 Journal of Geophysical Research. Oceans, 2022, 128 (1), pp.e2022JC018929. ⟨10.1029/2022jc018929⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2022jc018929 info:eu-repo/grantAgreement//820575/EU/Tipping Points in Antarctic Climate Components/TiPACCs hal-04301354 https://hal.science/hal-04301354 https://hal.science/hal-04301354/document https://hal.science/hal-04301354/file/caillet_JGR_2023.pdf doi:10.1029/2022jc018929 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2022jc018929 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
128 |
container_issue |
1 |
_version_ |
1796304053765931008 |