Glacier thickening and decay analysis from 50 years of glaciological observations performed on Glacier d'Argentière, Mont Blanc area, France
International audience Numerous glaciological data have been obtained from measurements carried out on Glacier d'Argentière, Mont Blanc area, France, since the beginning of the 20th century. Moreover, data on annual mass balance, ice-flow velocity, thickness variation and length fluctuation hav...
Published in: | Annals of Glaciology |
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Main Authors: | , , , |
Other Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2009
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Subjects: | |
Online Access: | https://hal-insu.archives-ouvertes.fr/insu-00420650 https://hal-insu.archives-ouvertes.fr/insu-00420650/document https://hal-insu.archives-ouvertes.fr/insu-00420650/file/glacier-thickening-and-decay-analysis-from-50-years-of-glaciological-observations-performed-on-glacier-dargentiere-mont-blanc-area-france.pdf https://doi.org/10.3189/172756409787769500 |
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ftunivnantes:oai:HAL:insu-00420650v1 |
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openpolar |
institution |
Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Vincent, Christian Soruco, Alvaro Six, Delphine Le Meur, Emmanuel Glacier thickening and decay analysis from 50 years of glaciological observations performed on Glacier d'Argentière, Mont Blanc area, France |
topic_facet |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience Numerous glaciological data have been obtained from measurements carried out on Glacier d'Argentière, Mont Blanc area, France, since the beginning of the 20th century. Moreover, data on annual mass balance, ice-flow velocity, thickness variation and length fluctuation have been obtained from yearly measurements performed since 1975. This dataset provides an excellent opportunity to analyze the relationships between surface mass balance and dynamic response over time periods during which net mass balance changed from positive to negative. Following a positive specific-net-balance period between 1960 and 1981, the ablation zone experienced a large increase in thickness and ice-flow velocities. Conversely, the highly negative specific-net-balance period since 1982 has led to strong thinning, deceleration and retreat of the tongue. The response of these observed dynamics to surface mass balance is analyzed from ice-flux calculations performed on three transverse cross-sections. Our results reveal that the ice fluxes are largely accommodated by ice-flow velocities. Velocity fluctuations are synchronous over the entire area studied. In the largest part of the glacier, no compressing/extending flow change has been observed over the last 30 years and thickness changes are solely driven by surface mass-balance changes. However, on the tongue of the glacier, thickness changes do not depend on surface mass balance but are mainly driven by changes in the longitudinal strain rate. |
author2 |
Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-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 Joseph Fourier - Grenoble 1 (UJF)-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)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Vincent, Christian Soruco, Alvaro Six, Delphine Le Meur, Emmanuel |
author_facet |
Vincent, Christian Soruco, Alvaro Six, Delphine Le Meur, Emmanuel |
author_sort |
Vincent, Christian |
title |
Glacier thickening and decay analysis from 50 years of glaciological observations performed on Glacier d'Argentière, Mont Blanc area, France |
title_short |
Glacier thickening and decay analysis from 50 years of glaciological observations performed on Glacier d'Argentière, Mont Blanc area, France |
title_full |
Glacier thickening and decay analysis from 50 years of glaciological observations performed on Glacier d'Argentière, Mont Blanc area, France |
title_fullStr |
Glacier thickening and decay analysis from 50 years of glaciological observations performed on Glacier d'Argentière, Mont Blanc area, France |
title_full_unstemmed |
Glacier thickening and decay analysis from 50 years of glaciological observations performed on Glacier d'Argentière, Mont Blanc area, France |
title_sort |
glacier thickening and decay analysis from 50 years of glaciological observations performed on glacier d'argentière, mont blanc area, france |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://hal-insu.archives-ouvertes.fr/insu-00420650 https://hal-insu.archives-ouvertes.fr/insu-00420650/document https://hal-insu.archives-ouvertes.fr/insu-00420650/file/glacier-thickening-and-decay-analysis-from-50-years-of-glaciological-observations-performed-on-glacier-dargentiere-mont-blanc-area-france.pdf https://doi.org/10.3189/172756409787769500 |
long_lat |
ENVELOPE(69.468,69.468,-49.461,-49.461) |
geographic |
Mont Blanc |
geographic_facet |
Mont Blanc |
genre |
Annals of Glaciology |
genre_facet |
Annals of Glaciology |
op_source |
ISSN: 0260-3055 EISSN: 1727-5644 Annals of Glaciology https://hal-insu.archives-ouvertes.fr/insu-00420650 Annals of Glaciology, 2009, 50 (50), pp.73-79. ⟨10.3189/172756409787769500⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3189/172756409787769500 insu-00420650 https://hal-insu.archives-ouvertes.fr/insu-00420650 https://hal-insu.archives-ouvertes.fr/insu-00420650/document https://hal-insu.archives-ouvertes.fr/insu-00420650/file/glacier-thickening-and-decay-analysis-from-50-years-of-glaciological-observations-performed-on-glacier-dargentiere-mont-blanc-area-france.pdf doi:10.3189/172756409787769500 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3189/172756409787769500 |
container_title |
Annals of Glaciology |
container_volume |
50 |
container_issue |
50 |
container_start_page |
73 |
op_container_end_page |
79 |
_version_ |
1766000475118764032 |
spelling |
ftunivnantes:oai:HAL:insu-00420650v1 2023-05-15T13:29:25+02:00 Glacier thickening and decay analysis from 50 years of glaciological observations performed on Glacier d'Argentière, Mont Blanc area, France Vincent, Christian Soruco, Alvaro Six, Delphine Le Meur, Emmanuel Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-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 Joseph Fourier - Grenoble 1 (UJF)-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)-Centre National de la Recherche Scientifique (CNRS) 2009-03 https://hal-insu.archives-ouvertes.fr/insu-00420650 https://hal-insu.archives-ouvertes.fr/insu-00420650/document https://hal-insu.archives-ouvertes.fr/insu-00420650/file/glacier-thickening-and-decay-analysis-from-50-years-of-glaciological-observations-performed-on-glacier-dargentiere-mont-blanc-area-france.pdf https://doi.org/10.3189/172756409787769500 en eng HAL CCSD Cambridge University Press info:eu-repo/semantics/altIdentifier/doi/10.3189/172756409787769500 insu-00420650 https://hal-insu.archives-ouvertes.fr/insu-00420650 https://hal-insu.archives-ouvertes.fr/insu-00420650/document https://hal-insu.archives-ouvertes.fr/insu-00420650/file/glacier-thickening-and-decay-analysis-from-50-years-of-glaciological-observations-performed-on-glacier-dargentiere-mont-blanc-area-france.pdf doi:10.3189/172756409787769500 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0260-3055 EISSN: 1727-5644 Annals of Glaciology https://hal-insu.archives-ouvertes.fr/insu-00420650 Annals of Glaciology, 2009, 50 (50), pp.73-79. ⟨10.3189/172756409787769500⟩ [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2009 ftunivnantes https://doi.org/10.3189/172756409787769500 2023-03-01T02:31:41Z International audience Numerous glaciological data have been obtained from measurements carried out on Glacier d'Argentière, Mont Blanc area, France, since the beginning of the 20th century. Moreover, data on annual mass balance, ice-flow velocity, thickness variation and length fluctuation have been obtained from yearly measurements performed since 1975. This dataset provides an excellent opportunity to analyze the relationships between surface mass balance and dynamic response over time periods during which net mass balance changed from positive to negative. Following a positive specific-net-balance period between 1960 and 1981, the ablation zone experienced a large increase in thickness and ice-flow velocities. Conversely, the highly negative specific-net-balance period since 1982 has led to strong thinning, deceleration and retreat of the tongue. The response of these observed dynamics to surface mass balance is analyzed from ice-flux calculations performed on three transverse cross-sections. Our results reveal that the ice fluxes are largely accommodated by ice-flow velocities. Velocity fluctuations are synchronous over the entire area studied. In the largest part of the glacier, no compressing/extending flow change has been observed over the last 30 years and thickness changes are solely driven by surface mass-balance changes. However, on the tongue of the glacier, thickness changes do not depend on surface mass balance but are mainly driven by changes in the longitudinal strain rate. Article in Journal/Newspaper Annals of Glaciology Université de Nantes: HAL-UNIV-NANTES Mont Blanc ENVELOPE(69.468,69.468,-49.461,-49.461) Annals of Glaciology 50 50 73 79 |