Sustained retreat of the Pine Island Glacier
International audience We use satellite observations to show that, between 1992 and 2011, the Pine Island Glacier hinge line retreated at a rate of 0.95 ± 0.09 km yr−1 despite a progressive steepening and shoaling of the glacier surface and bedrock slopes, respectively, which ought to impede retreat...
Published in: | Geophysical Research Letters |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://hal.archives-ouvertes.fr/hal-00856384 https://hal.archives-ouvertes.fr/hal-00856384/document https://hal.archives-ouvertes.fr/hal-00856384/file/grl.50379.pdf https://doi.org/10.1002/grl.50379 |
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ftccsdartic:oai:HAL:hal-00856384v1 2023-05-15T13:35:00+02:00 Sustained retreat of the Pine Island Glacier Park, J. W. Gourmelen, N. Shepherd, A. Kim, S. W. Vaughan, D. G. Wingham, D. J. Yonsei University Dynamique globale et déformation active (IPGS) (IPGS-DGDA) Institut de physique du globe de Strasbourg (IPGS) Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS) Institute for Climate and Atmospheric Science Leeds (ICAS) School of Earth and Environment Leeds (SEE) University of Leeds-University of Leeds Sejong University British Antarctic Survey (BAS) Natural Environment Research Council (NERC) University College of London London (UCL) 2013 https://hal.archives-ouvertes.fr/hal-00856384 https://hal.archives-ouvertes.fr/hal-00856384/document https://hal.archives-ouvertes.fr/hal-00856384/file/grl.50379.pdf https://doi.org/10.1002/grl.50379 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1002/grl.50379 hal-00856384 https://hal.archives-ouvertes.fr/hal-00856384 https://hal.archives-ouvertes.fr/hal-00856384/document https://hal.archives-ouvertes.fr/hal-00856384/file/grl.50379.pdf doi:10.1002/grl.50379 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.archives-ouvertes.fr/hal-00856384 Geophysical Research Letters, American Geophysical Union, 2013, 40 (10), pp.2137--2142. ⟨10.1002/grl.50379⟩ Antarctica InSAR [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2013 ftccsdartic https://doi.org/10.1002/grl.50379 2021-10-23T22:32:50Z International audience We use satellite observations to show that, between 1992 and 2011, the Pine Island Glacier hinge line retreated at a rate of 0.95 ± 0.09 km yr−1 despite a progressive steepening and shoaling of the glacier surface and bedrock slopes, respectively, which ought to impede retreat. The retreat has remained constant because the glacier terminus has thinned at an accelerating rate of 0.53 ± 0.15 m yr−2, with comparable changes upstream. This acceleration is consistent with an intensification of ocean-driven melting in the cavity beneath the floating section of the glacier. The pattern of hinge-line retreat meanders and is concentrated in isolated regions until ice becomes locally buoyant. Because the glacier-ocean system does not appear to have reached a position of relative stability, the lower limit of sea level projections may be too conservative. Article in Journal/Newspaper Antarc* Antarctica Pine Island Pine Island Glacier Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) Geophysical Research Letters 40 10 2137 2142 |
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 |
Antarctica InSAR [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
Antarctica InSAR [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes Park, J. W. Gourmelen, N. Shepherd, A. Kim, S. W. Vaughan, D. G. Wingham, D. J. Sustained retreat of the Pine Island Glacier |
topic_facet |
Antarctica InSAR [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience We use satellite observations to show that, between 1992 and 2011, the Pine Island Glacier hinge line retreated at a rate of 0.95 ± 0.09 km yr−1 despite a progressive steepening and shoaling of the glacier surface and bedrock slopes, respectively, which ought to impede retreat. The retreat has remained constant because the glacier terminus has thinned at an accelerating rate of 0.53 ± 0.15 m yr−2, with comparable changes upstream. This acceleration is consistent with an intensification of ocean-driven melting in the cavity beneath the floating section of the glacier. The pattern of hinge-line retreat meanders and is concentrated in isolated regions until ice becomes locally buoyant. Because the glacier-ocean system does not appear to have reached a position of relative stability, the lower limit of sea level projections may be too conservative. |
author2 |
Yonsei University Dynamique globale et déformation active (IPGS) (IPGS-DGDA) Institut de physique du globe de Strasbourg (IPGS) Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS) Institute for Climate and Atmospheric Science Leeds (ICAS) School of Earth and Environment Leeds (SEE) University of Leeds-University of Leeds Sejong University British Antarctic Survey (BAS) Natural Environment Research Council (NERC) University College of London London (UCL) |
format |
Article in Journal/Newspaper |
author |
Park, J. W. Gourmelen, N. Shepherd, A. Kim, S. W. Vaughan, D. G. Wingham, D. J. |
author_facet |
Park, J. W. Gourmelen, N. Shepherd, A. Kim, S. W. Vaughan, D. G. Wingham, D. J. |
author_sort |
Park, J. W. |
title |
Sustained retreat of the Pine Island Glacier |
title_short |
Sustained retreat of the Pine Island Glacier |
title_full |
Sustained retreat of the Pine Island Glacier |
title_fullStr |
Sustained retreat of the Pine Island Glacier |
title_full_unstemmed |
Sustained retreat of the Pine Island Glacier |
title_sort |
sustained retreat of the pine island glacier |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.archives-ouvertes.fr/hal-00856384 https://hal.archives-ouvertes.fr/hal-00856384/document https://hal.archives-ouvertes.fr/hal-00856384/file/grl.50379.pdf https://doi.org/10.1002/grl.50379 |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Pine Island Glacier |
geographic_facet |
Pine Island Glacier |
genre |
Antarc* Antarctica Pine Island Pine Island Glacier |
genre_facet |
Antarc* Antarctica Pine Island Pine Island Glacier |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.archives-ouvertes.fr/hal-00856384 Geophysical Research Letters, American Geophysical Union, 2013, 40 (10), pp.2137--2142. ⟨10.1002/grl.50379⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/grl.50379 hal-00856384 https://hal.archives-ouvertes.fr/hal-00856384 https://hal.archives-ouvertes.fr/hal-00856384/document https://hal.archives-ouvertes.fr/hal-00856384/file/grl.50379.pdf doi:10.1002/grl.50379 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1002/grl.50379 |
container_title |
Geophysical Research Letters |
container_volume |
40 |
container_issue |
10 |
container_start_page |
2137 |
op_container_end_page |
2142 |
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1766060013200080896 |