Halving of Swiss glacier volume since 1931 observed from terrestrial image photogrammetry
International audience The monitoring of glaciers in Switzerland has a long tradition, yet glacier changes during the 20th century are only known through sparse observations. Here, we estimate a halving of Swiss glacier volumes between 1931 and 2016 by mapping historical glacier elevation changes at...
Published in: | The Cryosphere |
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Main Authors: | , , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2022
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-03859268 https://hal-insu.archives-ouvertes.fr/insu-03859268/document https://hal-insu.archives-ouvertes.fr/insu-03859268/file/tc-16-3249-2022.pdf https://doi.org/10.5194/tc-16-3249-2022 |
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Université de Nantes: HAL-UNIV-NANTES |
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English |
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[SDU]Sciences of the Universe [physics] [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
[SDU]Sciences of the Universe [physics] [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Schytt Mannerfelt, Erik Dehecq, Amaury Hugonnet, Romain Hodel, Elias Huss, Matthias Bauder, Andreas Farinotti, Daniel Halving of Swiss glacier volume since 1931 observed from terrestrial image photogrammetry |
topic_facet |
[SDU]Sciences of the Universe [physics] [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience The monitoring of glaciers in Switzerland has a long tradition, yet glacier changes during the 20th century are only known through sparse observations. Here, we estimate a halving of Swiss glacier volumes between 1931 and 2016 by mapping historical glacier elevation changes at high resolution. Our analysis relies on a terrestrial image archive known as TerrA, which covers about 86 % of the Swiss glacierised area with 21 703 images acquired during the period 1916-1947 (with a median date of 1931). We developed a semi-automated workflow to generate digital elevation models (DEMs) from these images, resulting in a 45 % total glacier coverage. Using the geodetic method, we estimate a Swiss-wide glacier mass balance of −0.52 ± 0.09 m w.e. a −1 between 1931 and 2016. This equates to a 51.5 ± 8.0 % loss in glacier volume. We find that low-elevation, high-debris-cover, and gently sloping glacier termini are conducive to particularly high mass losses. In addition to these glacier-specific, quasi-centennial elevation changes, we present a new inventory of glacier outlines with known timestamps and complete attributes from around 1931. The fragmented spatial coverage and temporal heterogeneity of the TerrA archive are the largest sources of uncertainty in our glacier-specific estimates, reaching up to 0.50 m w.e. a −1 . We suggest that the high-resolution mapping of historical surface elevations could also unlock great potential for research fields other than glaciology. |
author2 |
Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) 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) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-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)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Schytt Mannerfelt, Erik Dehecq, Amaury Hugonnet, Romain Hodel, Elias Huss, Matthias Bauder, Andreas Farinotti, Daniel |
author_facet |
Schytt Mannerfelt, Erik Dehecq, Amaury Hugonnet, Romain Hodel, Elias Huss, Matthias Bauder, Andreas Farinotti, Daniel |
author_sort |
Schytt Mannerfelt, Erik |
title |
Halving of Swiss glacier volume since 1931 observed from terrestrial image photogrammetry |
title_short |
Halving of Swiss glacier volume since 1931 observed from terrestrial image photogrammetry |
title_full |
Halving of Swiss glacier volume since 1931 observed from terrestrial image photogrammetry |
title_fullStr |
Halving of Swiss glacier volume since 1931 observed from terrestrial image photogrammetry |
title_full_unstemmed |
Halving of Swiss glacier volume since 1931 observed from terrestrial image photogrammetry |
title_sort |
halving of swiss glacier volume since 1931 observed from terrestrial image photogrammetry |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal-insu.archives-ouvertes.fr/insu-03859268 https://hal-insu.archives-ouvertes.fr/insu-03859268/document https://hal-insu.archives-ouvertes.fr/insu-03859268/file/tc-16-3249-2022.pdf https://doi.org/10.5194/tc-16-3249-2022 |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_source |
ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal-insu.archives-ouvertes.fr/insu-03859268 The Cryosphere, 2022, 16, pp.3249-3268. ⟨10.5194/tc-16-3249-2022⟩ |
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info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-16-3249-2022 insu-03859268 https://hal-insu.archives-ouvertes.fr/insu-03859268 https://hal-insu.archives-ouvertes.fr/insu-03859268/document https://hal-insu.archives-ouvertes.fr/insu-03859268/file/tc-16-3249-2022.pdf BIBCODE: 2022TCry.16.3249S doi:10.5194/tc-16-3249-2022 IRD: fdi:010086009 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/tc-16-3249-2022 |
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The Cryosphere |
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16 |
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8 |
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3249 |
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3268 |
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ftunivnantes:oai:HAL:insu-03859268v1 2023-05-15T18:32:20+02:00 Halving of Swiss glacier volume since 1931 observed from terrestrial image photogrammetry Schytt Mannerfelt, Erik Dehecq, Amaury Hugonnet, Romain Hodel, Elias Huss, Matthias Bauder, Andreas Farinotti, Daniel Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) 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) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-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)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) 2022 https://hal-insu.archives-ouvertes.fr/insu-03859268 https://hal-insu.archives-ouvertes.fr/insu-03859268/document https://hal-insu.archives-ouvertes.fr/insu-03859268/file/tc-16-3249-2022.pdf https://doi.org/10.5194/tc-16-3249-2022 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-16-3249-2022 insu-03859268 https://hal-insu.archives-ouvertes.fr/insu-03859268 https://hal-insu.archives-ouvertes.fr/insu-03859268/document https://hal-insu.archives-ouvertes.fr/insu-03859268/file/tc-16-3249-2022.pdf BIBCODE: 2022TCry.16.3249S doi:10.5194/tc-16-3249-2022 IRD: fdi:010086009 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal-insu.archives-ouvertes.fr/insu-03859268 The Cryosphere, 2022, 16, pp.3249-3268. ⟨10.5194/tc-16-3249-2022⟩ [SDU]Sciences of the Universe [physics] [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2022 ftunivnantes https://doi.org/10.5194/tc-16-3249-2022 2023-03-01T01:18:21Z International audience The monitoring of glaciers in Switzerland has a long tradition, yet glacier changes during the 20th century are only known through sparse observations. Here, we estimate a halving of Swiss glacier volumes between 1931 and 2016 by mapping historical glacier elevation changes at high resolution. Our analysis relies on a terrestrial image archive known as TerrA, which covers about 86 % of the Swiss glacierised area with 21 703 images acquired during the period 1916-1947 (with a median date of 1931). We developed a semi-automated workflow to generate digital elevation models (DEMs) from these images, resulting in a 45 % total glacier coverage. Using the geodetic method, we estimate a Swiss-wide glacier mass balance of −0.52 ± 0.09 m w.e. a −1 between 1931 and 2016. This equates to a 51.5 ± 8.0 % loss in glacier volume. We find that low-elevation, high-debris-cover, and gently sloping glacier termini are conducive to particularly high mass losses. In addition to these glacier-specific, quasi-centennial elevation changes, we present a new inventory of glacier outlines with known timestamps and complete attributes from around 1931. The fragmented spatial coverage and temporal heterogeneity of the TerrA archive are the largest sources of uncertainty in our glacier-specific estimates, reaching up to 0.50 m w.e. a −1 . We suggest that the high-resolution mapping of historical surface elevations could also unlock great potential for research fields other than glaciology. Article in Journal/Newspaper The Cryosphere Université de Nantes: HAL-UNIV-NANTES The Cryosphere 16 8 3249 3268 |