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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Online Access: | https://hal.science/hal-00537722 https://hal.science/hal-00537722/document https://hal.science/hal-00537722/file/Berthier_et_al_NGeo_2010_PrePrint.pdf https://doi.org/10.1038/ngeo737 |
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ftutoulouse3hal:oai:HAL:hal-00537722v1 2024-09-15T18:07:31+00:00 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 de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-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.science/hal-00537722 https://hal.science/hal-00537722/document https://hal.science/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.science/hal-00537722 https://hal.science/hal-00537722/document https://hal.science/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.science/hal-00537722 Nature Geoscience, 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 ftutoulouse3hal https://doi.org/10.1038/ngeo737 2024-06-25T00:00:59Z 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 Université Toulouse III - Paul Sabatier: HAL-UPS Nature Geoscience 3 2 92 95 |
institution |
Open Polar |
collection |
Université Toulouse III - Paul Sabatier: HAL-UPS |
op_collection_id |
ftutoulouse3hal |
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 de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-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.science/hal-00537722 https://hal.science/hal-00537722/document https://hal.science/hal-00537722/file/Berthier_et_al_NGeo_2010_PrePrint.pdf https://doi.org/10.1038/ngeo737 |
genre |
glacier glaciers Alaska |
genre_facet |
glacier glaciers Alaska |
op_source |
ISSN: 1752-0894 Nature Geoscience https://hal.science/hal-00537722 Nature Geoscience, 2010, 3 (2), pp.92-95. ⟨10.1038/ngeo737⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/ngeo737 hal-00537722 https://hal.science/hal-00537722 https://hal.science/hal-00537722/document https://hal.science/hal-00537722/file/Berthier_et_al_NGeo_2010_PrePrint.pdf doi:10.1038/ngeo737 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1038/ngeo737 |
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Nature Geoscience |
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container_start_page |
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