Changes in glacier equilibrium-line altitude in the western Alps from 1984 to 2010: evaluation by remote sensing and modeling of the morpho-topographic and climate controls
We present time series of equilibrium-line altitude (ELA) measured from the end-of-summer snow line altitude computed using satellite images, for 43 glaciers in the western Alps over the 1984-2010 period. More than 120 satellite images acquired by Landsat, SPOT and ASTER were used. In parallel, chan...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , |
Other Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2013
|
Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-00923554 https://hal.archives-ouvertes.fr/hal-00923554/document https://hal.archives-ouvertes.fr/hal-00923554/file/gr2013-pub00039493.pdf https://doi.org/10.5194/tc-7-1455-2013 |
id |
ftccsdartic:oai:HAL:hal-00923554v1 |
---|---|
record_format |
openpolar |
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 |
ALPES OCCIDENTALES STATISTIQUE BAYESIENNE TELEDETECTION MORPHOLOGIE TOPOGRAPHIE ALTITUDE GLACIER CHANGEMENT CLIMATIQUE BAYESIAN ANALYSIS CLIMATE EFFECT EQUILIBRIUM LINE GLACIER DYNAMICS PRECIPITATION REMOTE SENSING SATELLITE IMAGERY TIME SERIES ANALYSIS TOPOGRAPHY [SDE]Environmental Sciences |
spellingShingle |
ALPES OCCIDENTALES STATISTIQUE BAYESIENNE TELEDETECTION MORPHOLOGIE TOPOGRAPHIE ALTITUDE GLACIER CHANGEMENT CLIMATIQUE BAYESIAN ANALYSIS CLIMATE EFFECT EQUILIBRIUM LINE GLACIER DYNAMICS PRECIPITATION REMOTE SENSING SATELLITE IMAGERY TIME SERIES ANALYSIS TOPOGRAPHY [SDE]Environmental Sciences Rabatel, A. Letréguilly, A. Dedieu, J.P. Eckert, Nicolas Changes in glacier equilibrium-line altitude in the western Alps from 1984 to 2010: evaluation by remote sensing and modeling of the morpho-topographic and climate controls |
topic_facet |
ALPES OCCIDENTALES STATISTIQUE BAYESIENNE TELEDETECTION MORPHOLOGIE TOPOGRAPHIE ALTITUDE GLACIER CHANGEMENT CLIMATIQUE BAYESIAN ANALYSIS CLIMATE EFFECT EQUILIBRIUM LINE GLACIER DYNAMICS PRECIPITATION REMOTE SENSING SATELLITE IMAGERY TIME SERIES ANALYSIS TOPOGRAPHY [SDE]Environmental Sciences |
description |
We present time series of equilibrium-line altitude (ELA) measured from the end-of-summer snow line altitude computed using satellite images, for 43 glaciers in the western Alps over the 1984-2010 period. More than 120 satellite images acquired by Landsat, SPOT and ASTER were used. In parallel, changes in climate variables, summer cumulative positive degree days (CPDD) and winter precipitation, were analyzed over the same time period using 22 weather stations located inside and around the study area. Assuming a continuous linear trend over the study period: (1) the average ELA of the 43 glaciers increased by about 170 m; (2) summer CPDD increased by about 150 PDD at 3000 m a.s.l.; and (3) winter precipitation remained rather stationary. Summer CPDD showed homogeneous spatial and temporal variability; winter precipitation showed homogeneous temporal variability, but some stations showed a slightly different spatial pattern. Regarding ELAs, temporal variability between the 43 glaciers was also homogeneous, but spatially, glaciers in the southern part of the study area differed from glaciers in the northern part, mainly due to a different precipitation pattern. A sensitivity analysis of the ELAs to climate and morpho-topographic variables (elevation, aspect, latitude) highlighted the following: (1) the average ELA over the study period of each glacier is strongly controlled by morpho-topographic variables; and (2) the interannual variability of the ELA is strongly controlled by climate variables, with the observed increasing trend mainly driven by increasing temperatures, even if significant nonlinear, low-frequency fluctuations appear to be driven by winter precipitation anomalies. Finally, we used an expansion of Lliboutry's approach to reconstruct fluctuations in the ELA of any glacier of the study area with respect to morpho-topographic and climate variables, by quantifying their respective weight and the related uncertainties in a consistent manner within a hierarchical Bayesian framework. This method was ... |
author2 |
Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-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 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) Laboratoire d'étude des transferts en hydrologie et environnement (LTHE) Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-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) Erosion torrentielle neige et avalanches (UR ETGR (ETNA)) Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) CNES/SPOT-Image ISIS program : 0103-1570412-7252010-4052010-435 |
format |
Article in Journal/Newspaper |
author |
Rabatel, A. Letréguilly, A. Dedieu, J.P. Eckert, Nicolas |
author_facet |
Rabatel, A. Letréguilly, A. Dedieu, J.P. Eckert, Nicolas |
author_sort |
Rabatel, A. |
title |
Changes in glacier equilibrium-line altitude in the western Alps from 1984 to 2010: evaluation by remote sensing and modeling of the morpho-topographic and climate controls |
title_short |
Changes in glacier equilibrium-line altitude in the western Alps from 1984 to 2010: evaluation by remote sensing and modeling of the morpho-topographic and climate controls |
title_full |
Changes in glacier equilibrium-line altitude in the western Alps from 1984 to 2010: evaluation by remote sensing and modeling of the morpho-topographic and climate controls |
title_fullStr |
Changes in glacier equilibrium-line altitude in the western Alps from 1984 to 2010: evaluation by remote sensing and modeling of the morpho-topographic and climate controls |
title_full_unstemmed |
Changes in glacier equilibrium-line altitude in the western Alps from 1984 to 2010: evaluation by remote sensing and modeling of the morpho-topographic and climate controls |
title_sort |
changes in glacier equilibrium-line altitude in the western alps from 1984 to 2010: evaluation by remote sensing and modeling of the morpho-topographic and climate controls |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.archives-ouvertes.fr/hal-00923554 https://hal.archives-ouvertes.fr/hal-00923554/document https://hal.archives-ouvertes.fr/hal-00923554/file/gr2013-pub00039493.pdf https://doi.org/10.5194/tc-7-1455-2013 |
long_lat |
ENVELOPE(9.642,9.642,63.170,63.170) ENVELOPE(167.833,167.833,-72.983,-72.983) |
geographic |
Ela Line Glacier |
geographic_facet |
Ela Line Glacier |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_source |
ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.archives-ouvertes.fr/hal-00923554 The Cryosphere, Copernicus 2013, 7 (5), p. 1455 - p. 1471. ⟨10.5194/tc-7-1455-2013⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-7-1455-2013 hal-00923554 https://hal.archives-ouvertes.fr/hal-00923554 https://hal.archives-ouvertes.fr/hal-00923554/document https://hal.archives-ouvertes.fr/hal-00923554/file/gr2013-pub00039493.pdf doi:10.5194/tc-7-1455-2013 IRSTEA: PUB00039493 WOS: 000328544800010 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/tc-7-1455-2013 |
container_title |
The Cryosphere |
container_volume |
7 |
container_issue |
5 |
container_start_page |
1455 |
op_container_end_page |
1471 |
_version_ |
1766216334749728768 |
spelling |
ftccsdartic:oai:HAL:hal-00923554v1 2023-05-15T18:32:15+02:00 Changes in glacier equilibrium-line altitude in the western Alps from 1984 to 2010: evaluation by remote sensing and modeling of the morpho-topographic and climate controls Rabatel, A. Letréguilly, A. Dedieu, J.P. Eckert, Nicolas Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-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 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) Laboratoire d'étude des transferts en hydrologie et environnement (LTHE) Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS)-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) Erosion torrentielle neige et avalanches (UR ETGR (ETNA)) Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) CNES/SPOT-Image ISIS program : 0103-1570412-7252010-4052010-435 2013 https://hal.archives-ouvertes.fr/hal-00923554 https://hal.archives-ouvertes.fr/hal-00923554/document https://hal.archives-ouvertes.fr/hal-00923554/file/gr2013-pub00039493.pdf https://doi.org/10.5194/tc-7-1455-2013 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-7-1455-2013 hal-00923554 https://hal.archives-ouvertes.fr/hal-00923554 https://hal.archives-ouvertes.fr/hal-00923554/document https://hal.archives-ouvertes.fr/hal-00923554/file/gr2013-pub00039493.pdf doi:10.5194/tc-7-1455-2013 IRSTEA: PUB00039493 WOS: 000328544800010 info:eu-repo/semantics/OpenAccess ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.archives-ouvertes.fr/hal-00923554 The Cryosphere, Copernicus 2013, 7 (5), p. 1455 - p. 1471. ⟨10.5194/tc-7-1455-2013⟩ ALPES OCCIDENTALES STATISTIQUE BAYESIENNE TELEDETECTION MORPHOLOGIE TOPOGRAPHIE ALTITUDE GLACIER CHANGEMENT CLIMATIQUE BAYESIAN ANALYSIS CLIMATE EFFECT EQUILIBRIUM LINE GLACIER DYNAMICS PRECIPITATION REMOTE SENSING SATELLITE IMAGERY TIME SERIES ANALYSIS TOPOGRAPHY [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2013 ftccsdartic https://doi.org/10.5194/tc-7-1455-2013 2021-10-24T14:11:22Z We present time series of equilibrium-line altitude (ELA) measured from the end-of-summer snow line altitude computed using satellite images, for 43 glaciers in the western Alps over the 1984-2010 period. More than 120 satellite images acquired by Landsat, SPOT and ASTER were used. In parallel, changes in climate variables, summer cumulative positive degree days (CPDD) and winter precipitation, were analyzed over the same time period using 22 weather stations located inside and around the study area. Assuming a continuous linear trend over the study period: (1) the average ELA of the 43 glaciers increased by about 170 m; (2) summer CPDD increased by about 150 PDD at 3000 m a.s.l.; and (3) winter precipitation remained rather stationary. Summer CPDD showed homogeneous spatial and temporal variability; winter precipitation showed homogeneous temporal variability, but some stations showed a slightly different spatial pattern. Regarding ELAs, temporal variability between the 43 glaciers was also homogeneous, but spatially, glaciers in the southern part of the study area differed from glaciers in the northern part, mainly due to a different precipitation pattern. A sensitivity analysis of the ELAs to climate and morpho-topographic variables (elevation, aspect, latitude) highlighted the following: (1) the average ELA over the study period of each glacier is strongly controlled by morpho-topographic variables; and (2) the interannual variability of the ELA is strongly controlled by climate variables, with the observed increasing trend mainly driven by increasing temperatures, even if significant nonlinear, low-frequency fluctuations appear to be driven by winter precipitation anomalies. Finally, we used an expansion of Lliboutry's approach to reconstruct fluctuations in the ELA of any glacier of the study area with respect to morpho-topographic and climate variables, by quantifying their respective weight and the related uncertainties in a consistent manner within a hierarchical Bayesian framework. This method was ... Article in Journal/Newspaper The Cryosphere Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Ela ENVELOPE(9.642,9.642,63.170,63.170) Line Glacier ENVELOPE(167.833,167.833,-72.983,-72.983) The Cryosphere 7 5 1455 1471 |