Channelized Melting Drives Thinning Under a Rapidly Melting Antarctic Ice Shelf
International audience Ice shelves play a vital role in regulating loss of grounded ice and in supplying freshwater to coastal seas. However, melt variability within ice shelves is poorly constrained and may be instrumental in driving ice shelf imbalance and collapse. High-resolution altimetry measu...
Published in: | Geophysical Research Letters |
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Format: | Article in Journal/Newspaper |
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-03707642 https://hal-insu.archives-ouvertes.fr/insu-03707642/document https://hal-insu.archives-ouvertes.fr/insu-03707642/file/Geophysical%20Research%20Letters%20-%202017%20-%20Gourmelen%20-%20Channelized%20Melting%20Drives%20Thinning%20Under%20a%20Rapidly%20Melting%20Antarctic%20Ice.pdf https://doi.org/10.1002/2017GL074929 |
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ftinsu:oai:HAL:insu-03707642v1 2023-06-18T03:36:27+02:00 Channelized Melting Drives Thinning Under a Rapidly Melting Antarctic Ice Shelf Gourmelen, Noel Goldberg, Dan N. Snow, Kate Henley, Sian F. Bingham, Robert G. Kimura, Satoshi Hogg, Anna E. Shepherd, Andrew Mouginot, Jeremie Lenaerts, Jan T. M. Ligtenberg, Stefan R. M. van de Berg, Willem Jan Institut de physique du globe de Strasbourg (IPGS) Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 2017 https://hal-insu.archives-ouvertes.fr/insu-03707642 https://hal-insu.archives-ouvertes.fr/insu-03707642/document https://hal-insu.archives-ouvertes.fr/insu-03707642/file/Geophysical%20Research%20Letters%20-%202017%20-%20Gourmelen%20-%20Channelized%20Melting%20Drives%20Thinning%20Under%20a%20Rapidly%20Melting%20Antarctic%20Ice.pdf https://doi.org/10.1002/2017GL074929 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1002/2017GL074929 insu-03707642 https://hal-insu.archives-ouvertes.fr/insu-03707642 https://hal-insu.archives-ouvertes.fr/insu-03707642/document https://hal-insu.archives-ouvertes.fr/insu-03707642/file/Geophysical%20Research%20Letters%20-%202017%20-%20Gourmelen%20-%20Channelized%20Melting%20Drives%20Thinning%20Under%20a%20Rapidly%20Melting%20Antarctic%20Ice.pdf BIBCODE: 2017GeoRL.44.9796G doi:10.1002/2017GL074929 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal-insu.archives-ouvertes.fr/insu-03707642 Geophysical Research Letters, 2017, 44, pp.9796-9804. ⟨10.1002/2017GL074929⟩ sea level ice shelves basal melt altimetry thinning collapse [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2017 ftinsu https://doi.org/10.1002/2017GL074929 2023-06-05T20:26:36Z International audience Ice shelves play a vital role in regulating loss of grounded ice and in supplying freshwater to coastal seas. However, melt variability within ice shelves is poorly constrained and may be instrumental in driving ice shelf imbalance and collapse. High-resolution altimetry measurements from 2010 to 2016 show that Dotson Ice Shelf (DIS), West Antarctica, thins in response to basal melting focused along a single 5 km-wide and 60 km-long channel extending from the ice shelf's grounding zone to its calving front. If focused thinning continues at present rates, the channel will melt through, and the ice shelf collapse, within 40-50 years, almost two centuries before collapse is projected from the average thinning rate. Our findings provide evidence of basal melt-driven sub-ice shelf channel formation and its potential for accelerating the weakening of ice shelves. Article in Journal/Newspaper Antarc* Antarctic Antarctica Dotson Ice Shelf Ice Shelf Ice Shelves West Antarctica Institut national des sciences de l'Univers: HAL-INSU Antarctic Dotson Ice Shelf ENVELOPE(-112.367,-112.367,-74.400,-74.400) Long Channel ENVELOPE(-103.834,-103.834,59.750,59.750) West Antarctica Geophysical Research Letters 44 19 9796 9804 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
sea level ice shelves basal melt altimetry thinning collapse [SDU]Sciences of the Universe [physics] |
spellingShingle |
sea level ice shelves basal melt altimetry thinning collapse [SDU]Sciences of the Universe [physics] Gourmelen, Noel Goldberg, Dan N. Snow, Kate Henley, Sian F. Bingham, Robert G. Kimura, Satoshi Hogg, Anna E. Shepherd, Andrew Mouginot, Jeremie Lenaerts, Jan T. M. Ligtenberg, Stefan R. M. van de Berg, Willem Jan Channelized Melting Drives Thinning Under a Rapidly Melting Antarctic Ice Shelf |
topic_facet |
sea level ice shelves basal melt altimetry thinning collapse [SDU]Sciences of the Universe [physics] |
description |
International audience Ice shelves play a vital role in regulating loss of grounded ice and in supplying freshwater to coastal seas. However, melt variability within ice shelves is poorly constrained and may be instrumental in driving ice shelf imbalance and collapse. High-resolution altimetry measurements from 2010 to 2016 show that Dotson Ice Shelf (DIS), West Antarctica, thins in response to basal melting focused along a single 5 km-wide and 60 km-long channel extending from the ice shelf's grounding zone to its calving front. If focused thinning continues at present rates, the channel will melt through, and the ice shelf collapse, within 40-50 years, almost two centuries before collapse is projected from the average thinning rate. Our findings provide evidence of basal melt-driven sub-ice shelf channel formation and its potential for accelerating the weakening of ice shelves. |
author2 |
Institut de physique du globe de Strasbourg (IPGS) Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Gourmelen, Noel Goldberg, Dan N. Snow, Kate Henley, Sian F. Bingham, Robert G. Kimura, Satoshi Hogg, Anna E. Shepherd, Andrew Mouginot, Jeremie Lenaerts, Jan T. M. Ligtenberg, Stefan R. M. van de Berg, Willem Jan |
author_facet |
Gourmelen, Noel Goldberg, Dan N. Snow, Kate Henley, Sian F. Bingham, Robert G. Kimura, Satoshi Hogg, Anna E. Shepherd, Andrew Mouginot, Jeremie Lenaerts, Jan T. M. Ligtenberg, Stefan R. M. van de Berg, Willem Jan |
author_sort |
Gourmelen, Noel |
title |
Channelized Melting Drives Thinning Under a Rapidly Melting Antarctic Ice Shelf |
title_short |
Channelized Melting Drives Thinning Under a Rapidly Melting Antarctic Ice Shelf |
title_full |
Channelized Melting Drives Thinning Under a Rapidly Melting Antarctic Ice Shelf |
title_fullStr |
Channelized Melting Drives Thinning Under a Rapidly Melting Antarctic Ice Shelf |
title_full_unstemmed |
Channelized Melting Drives Thinning Under a Rapidly Melting Antarctic Ice Shelf |
title_sort |
channelized melting drives thinning under a rapidly melting antarctic ice shelf |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal-insu.archives-ouvertes.fr/insu-03707642 https://hal-insu.archives-ouvertes.fr/insu-03707642/document https://hal-insu.archives-ouvertes.fr/insu-03707642/file/Geophysical%20Research%20Letters%20-%202017%20-%20Gourmelen%20-%20Channelized%20Melting%20Drives%20Thinning%20Under%20a%20Rapidly%20Melting%20Antarctic%20Ice.pdf https://doi.org/10.1002/2017GL074929 |
long_lat |
ENVELOPE(-112.367,-112.367,-74.400,-74.400) ENVELOPE(-103.834,-103.834,59.750,59.750) |
geographic |
Antarctic Dotson Ice Shelf Long Channel West Antarctica |
geographic_facet |
Antarctic Dotson Ice Shelf Long Channel West Antarctica |
genre |
Antarc* Antarctic Antarctica Dotson Ice Shelf Ice Shelf Ice Shelves West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Dotson Ice Shelf Ice Shelf Ice Shelves West Antarctica |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal-insu.archives-ouvertes.fr/insu-03707642 Geophysical Research Letters, 2017, 44, pp.9796-9804. ⟨10.1002/2017GL074929⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2017GL074929 insu-03707642 https://hal-insu.archives-ouvertes.fr/insu-03707642 https://hal-insu.archives-ouvertes.fr/insu-03707642/document https://hal-insu.archives-ouvertes.fr/insu-03707642/file/Geophysical%20Research%20Letters%20-%202017%20-%20Gourmelen%20-%20Channelized%20Melting%20Drives%20Thinning%20Under%20a%20Rapidly%20Melting%20Antarctic%20Ice.pdf BIBCODE: 2017GeoRL.44.9796G doi:10.1002/2017GL074929 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/2017GL074929 |
container_title |
Geophysical Research Letters |
container_volume |
44 |
container_issue |
19 |
container_start_page |
9796 |
op_container_end_page |
9804 |
_version_ |
1769006322793054208 |