Contribution of Alaskan glaciers to sea level rise derived from satellite imagery
International audience Over the last 50 years, retreating glaciers and ice caps (GIC) contributed 0.5 mm/yr to sea level rises (SLR), and one third is believed to originate from ice masses bordering the Gulf of Alaska. However, these estimates of ice wastage in Alaska are based on methods that measu...
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ftccsdartic:oai:HAL:hal-00537722v1 2023-05-15T16:20:20+02:00 Contribution of Alaskan glaciers to sea level rise derived from satellite imagery Berthier, Etienne Schiefer, Eric Clarke, Garry K. C. Menounos, Brian Rémy, Frédérique Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS) Department of Geography, Planning and Recreation (NAU) Northern Arizona University Flagstaff Earth and Ocean Sciences (EOS) University of British Columbia (UBC) Geography Program and Natural Resources Environmental Studies Institute (UNBC) University of Northern British Columbia Prince George (UNBC) 2010 https://hal.archives-ouvertes.fr/hal-00537722 https://hal.archives-ouvertes.fr/hal-00537722/document https://hal.archives-ouvertes.fr/hal-00537722/file/Berthier_et_al_NGeo_2010_PrePrint.pdf https://doi.org/10.1038/ngeo737 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/ngeo737 hal-00537722 https://hal.archives-ouvertes.fr/hal-00537722 https://hal.archives-ouvertes.fr/hal-00537722/document https://hal.archives-ouvertes.fr/hal-00537722/file/Berthier_et_al_NGeo_2010_PrePrint.pdf doi:10.1038/ngeo737 info:eu-repo/semantics/OpenAccess ISSN: 1752-0894 Nature Geoscience https://hal.archives-ouvertes.fr/hal-00537722 Nature Geoscience, Nature Publishing Group, 2010, 3 (2), pp.92-95. ⟨10.1038/ngeo737⟩ Glacier Alaska Sea level rise satellite ASTER SPOT5 [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2010 ftccsdartic https://doi.org/10.1038/ngeo737 2021-10-24T18:23:00Z International audience Over the last 50 years, retreating glaciers and ice caps (GIC) contributed 0.5 mm/yr to sea level rises (SLR), and one third is believed to originate from ice masses bordering the Gulf of Alaska. However, these estimates of ice wastage in Alaska are based on methods that measure a limited number of glaciers and extrapolate the results to estimate ice loss for the many thousands of others. How these methods capture the complex pattern of decadal elevation changes at the scale of individual glacier and mountain range is unclear. Here, combining a comprehensive glacier inventory with elevation changes derived from sequential digital elevation models (DEMs), we found that, between 1962 and 2006, Alaskan glaciers lost 41.9 ± 8.6 km**3/yr water equivalent (w.e.) and contributed 0.12±0.02 mm/yr to SLR. Our ice loss is 34% lower than previous estimates. Reasons for our lower values include the higher spatial resolution of our glacier inventory and the reduction of ice thinning under debris and at the glacier margins which were not resolved in earlier work. Estimates of mass loss from GIC in other mountain regions could be subject to similar revisions. Article in Journal/Newspaper glacier glaciers Alaska Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Gulf of Alaska Nature Geoscience 3 2 92 95 |
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 |
Glacier Alaska Sea level rise satellite ASTER SPOT5 [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
Glacier Alaska Sea level rise satellite ASTER SPOT5 [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Berthier, Etienne Schiefer, Eric Clarke, Garry K. C. Menounos, Brian Rémy, Frédérique Contribution of Alaskan glaciers to sea level rise derived from satellite imagery |
topic_facet |
Glacier Alaska Sea level rise satellite ASTER SPOT5 [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Over the last 50 years, retreating glaciers and ice caps (GIC) contributed 0.5 mm/yr to sea level rises (SLR), and one third is believed to originate from ice masses bordering the Gulf of Alaska. However, these estimates of ice wastage in Alaska are based on methods that measure a limited number of glaciers and extrapolate the results to estimate ice loss for the many thousands of others. How these methods capture the complex pattern of decadal elevation changes at the scale of individual glacier and mountain range is unclear. Here, combining a comprehensive glacier inventory with elevation changes derived from sequential digital elevation models (DEMs), we found that, between 1962 and 2006, Alaskan glaciers lost 41.9 ± 8.6 km**3/yr water equivalent (w.e.) and contributed 0.12±0.02 mm/yr to SLR. Our ice loss is 34% lower than previous estimates. Reasons for our lower values include the higher spatial resolution of our glacier inventory and the reduction of ice thinning under debris and at the glacier margins which were not resolved in earlier work. Estimates of mass loss from GIC in other mountain regions could be subject to similar revisions. |
author2 |
Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS) Department of Geography, Planning and Recreation (NAU) Northern Arizona University Flagstaff Earth and Ocean Sciences (EOS) University of British Columbia (UBC) Geography Program and Natural Resources Environmental Studies Institute (UNBC) University of Northern British Columbia Prince George (UNBC) |
format |
Article in Journal/Newspaper |
author |
Berthier, Etienne Schiefer, Eric Clarke, Garry K. C. Menounos, Brian Rémy, Frédérique |
author_facet |
Berthier, Etienne Schiefer, Eric Clarke, Garry K. C. Menounos, Brian Rémy, Frédérique |
author_sort |
Berthier, Etienne |
title |
Contribution of Alaskan glaciers to sea level rise derived from satellite imagery |
title_short |
Contribution of Alaskan glaciers to sea level rise derived from satellite imagery |
title_full |
Contribution of Alaskan glaciers to sea level rise derived from satellite imagery |
title_fullStr |
Contribution of Alaskan glaciers to sea level rise derived from satellite imagery |
title_full_unstemmed |
Contribution of Alaskan glaciers to sea level rise derived from satellite imagery |
title_sort |
contribution of alaskan glaciers to sea level rise derived from satellite imagery |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.archives-ouvertes.fr/hal-00537722 https://hal.archives-ouvertes.fr/hal-00537722/document https://hal.archives-ouvertes.fr/hal-00537722/file/Berthier_et_al_NGeo_2010_PrePrint.pdf https://doi.org/10.1038/ngeo737 |
geographic |
Gulf of Alaska |
geographic_facet |
Gulf of Alaska |
genre |
glacier glaciers Alaska |
genre_facet |
glacier glaciers Alaska |
op_source |
ISSN: 1752-0894 Nature Geoscience https://hal.archives-ouvertes.fr/hal-00537722 Nature Geoscience, Nature Publishing Group, 2010, 3 (2), pp.92-95. ⟨10.1038/ngeo737⟩ |
op_relation |
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info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1038/ngeo737 |
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Nature Geoscience |
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