The safety band of Antarctic ice shelves
International audience The floating ice shelves along the seaboard of the Antarctic ice sheet restrain the outflow of upstream grounded ice. Removal of these ice shelves, as shown by past ice-shelf recession and break-up, accelerates the outflow, which adds to sea-level rise. A key question in predi...
Published in: | Nature Climate Change |
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-01387118 https://doi.org/10.1038/NCLIMATE2912 |
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ftccsdartic:oai:HAL:insu-01387118v1 2023-05-15T13:43:33+02:00 The safety band of Antarctic ice shelves FÜRST, J Durand, Gaël Gillet-Chaulet, F. Tavard, L Rankl, Melanie Braun, Matthias GAGLIARDINI, Olivier Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG ) Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 )-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 )-Centre National de la Recherche Scientifique (CNRS) Friedrich-Alexander Universität Erlangen-Nürnberg (FAU) Institut Universitaire de France (IUF) Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.) 2016-02 https://hal-insu.archives-ouvertes.fr/insu-01387118 https://doi.org/10.1038/NCLIMATE2912 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/NCLIMATE2912 insu-01387118 https://hal-insu.archives-ouvertes.fr/insu-01387118 doi:10.1038/NCLIMATE2912 ISSN: 1758-678X EISSN: 1758-6798 Nature Climate Change https://hal-insu.archives-ouvertes.fr/insu-01387118 Nature Climate Change, Nature Publishing Group, 2016, 2016 (6), pp.479-482. ⟨10.1038/NCLIMATE2912⟩ Climate and Earth system modelling Cryospheric science [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2016 ftccsdartic https://doi.org/10.1038/NCLIMATE2912 2021-11-07T04:12:17Z International audience The floating ice shelves along the seaboard of the Antarctic ice sheet restrain the outflow of upstream grounded ice. Removal of these ice shelves, as shown by past ice-shelf recession and break-up, accelerates the outflow, which adds to sea-level rise. A key question in predicting future outflow is to quantify the extent of calving that might precondition other dynamic consequences and lead to loss of ice-shelf restraint. Here we delineate frontal areas that we label as ‘passive shelf ice’ and that can be removed without major dynamic implications, with contrasting results across the continent. The ice shelves in the Amundsen and Bellingshausen seas have limited or almost no ‘passive’ portion, which implies that further retreat of current ice-shelf fronts will yield important dynamic consequences. This region is particularly vulnerable as ice shelves have been thinning at high rates for two decades and as upstream grounded ice rests on a backward sloping bed, a precondition to marine ice-sheet instability. In contrast to these ice shelves, Larsen C Ice Shelf, in the Weddell Sea, exhibits a large ‘passive’ frontal area, suggesting that the imminent calving of a vast tabular iceberg8 will be unlikely to instantly produce much dynamic change. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Iceberg* Weddell Sea Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic The Antarctic Weddell Weddell Sea Nature Climate Change 6 5 479 482 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Climate and Earth system modelling Cryospheric science [SDE]Environmental Sciences |
spellingShingle |
Climate and Earth system modelling Cryospheric science [SDE]Environmental Sciences FÜRST, J Durand, Gaël Gillet-Chaulet, F. Tavard, L Rankl, Melanie Braun, Matthias GAGLIARDINI, Olivier The safety band of Antarctic ice shelves |
topic_facet |
Climate and Earth system modelling Cryospheric science [SDE]Environmental Sciences |
description |
International audience The floating ice shelves along the seaboard of the Antarctic ice sheet restrain the outflow of upstream grounded ice. Removal of these ice shelves, as shown by past ice-shelf recession and break-up, accelerates the outflow, which adds to sea-level rise. A key question in predicting future outflow is to quantify the extent of calving that might precondition other dynamic consequences and lead to loss of ice-shelf restraint. Here we delineate frontal areas that we label as ‘passive shelf ice’ and that can be removed without major dynamic implications, with contrasting results across the continent. The ice shelves in the Amundsen and Bellingshausen seas have limited or almost no ‘passive’ portion, which implies that further retreat of current ice-shelf fronts will yield important dynamic consequences. This region is particularly vulnerable as ice shelves have been thinning at high rates for two decades and as upstream grounded ice rests on a backward sloping bed, a precondition to marine ice-sheet instability. In contrast to these ice shelves, Larsen C Ice Shelf, in the Weddell Sea, exhibits a large ‘passive’ frontal area, suggesting that the imminent calving of a vast tabular iceberg8 will be unlikely to instantly produce much dynamic change. |
author2 |
Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG ) Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 )-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 )-Centre National de la Recherche Scientifique (CNRS) Friedrich-Alexander Universität Erlangen-Nürnberg (FAU) Institut Universitaire de France (IUF) Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.) |
format |
Article in Journal/Newspaper |
author |
FÜRST, J Durand, Gaël Gillet-Chaulet, F. Tavard, L Rankl, Melanie Braun, Matthias GAGLIARDINI, Olivier |
author_facet |
FÜRST, J Durand, Gaël Gillet-Chaulet, F. Tavard, L Rankl, Melanie Braun, Matthias GAGLIARDINI, Olivier |
author_sort |
FÜRST, J |
title |
The safety band of Antarctic ice shelves |
title_short |
The safety band of Antarctic ice shelves |
title_full |
The safety band of Antarctic ice shelves |
title_fullStr |
The safety band of Antarctic ice shelves |
title_full_unstemmed |
The safety band of Antarctic ice shelves |
title_sort |
safety band of antarctic ice shelves |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal-insu.archives-ouvertes.fr/insu-01387118 https://doi.org/10.1038/NCLIMATE2912 |
geographic |
Antarctic The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Iceberg* Weddell Sea |
genre_facet |
Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Iceberg* Weddell Sea |
op_source |
ISSN: 1758-678X EISSN: 1758-6798 Nature Climate Change https://hal-insu.archives-ouvertes.fr/insu-01387118 Nature Climate Change, Nature Publishing Group, 2016, 2016 (6), pp.479-482. ⟨10.1038/NCLIMATE2912⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/NCLIMATE2912 insu-01387118 https://hal-insu.archives-ouvertes.fr/insu-01387118 doi:10.1038/NCLIMATE2912 |
op_doi |
https://doi.org/10.1038/NCLIMATE2912 |
container_title |
Nature Climate Change |
container_volume |
6 |
container_issue |
5 |
container_start_page |
479 |
op_container_end_page |
482 |
_version_ |
1766190450171969536 |