Reduced melt on debris-covered glaciers: investigations from Changri Nup Glacier, Nepal
International audience Approximately 25 % of the glacierized area in the Everest region is covered by debris, yet the surface mass balance of debris-covered portions of these glaciers has not been measured directly. In this study, ground-based measurements of surface elevation and ice depth are comb...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2016
|
Subjects: | |
Online Access: | https://insu.hal.science/insu-01389475 https://insu.hal.science/insu-01389475/document https://insu.hal.science/insu-01389475/file/CRYOSPHERE%20-%20Reduced%20melt%20on%20debris-covered%20glaciers%20investigations%20from%20Changri%20Nup%20Glacier%20Nepal.pdf https://doi.org/10.5194/tc-10-1845-2016 |
id |
ftinsu:oai:HAL:insu-01389475v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Vincent, Christian Wagnon, Patrick, W Shea, Joseph, M Immerzeel, Walter, W Kraaijenbrink, Philip Shrestha, Dibas Soruco, Alvaro, M Arnaud, Yves Brun, Fanny Berthier, Etienne Sherpa, Sonam, Futi Reduced melt on debris-covered glaciers: investigations from Changri Nup Glacier, Nepal |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience Approximately 25 % of the glacierized area in the Everest region is covered by debris, yet the surface mass balance of debris-covered portions of these glaciers has not been measured directly. In this study, ground-based measurements of surface elevation and ice depth are combined with terrestrial photogrammetry, unmanned aerial vehicle (UAV) and satellite elevation models to derive the surface mass balance of the debris-covered tongue of Changri Nup Glacier, located in the Everest region. Over the debris-covered tongue, the mean elevation change between 2011 and 2015 is −0.93 m year−1 or −0.84 m water equivalent per year (w.e. a−1). The mean emergence velocity over this region, estimated from the total ice flux through a cross section immediately above the debris-covered zone, is +0.37 m w.e. a−1. The debris-covered portion of the glacier thus has an area-averaged mass balance of −1.21 ± 0.2 m w.e. a−1 between 5240 and 5525 m above sea level (m a.s.l.). Surface mass balances observed on nearby debris-free glaciers suggest that the ablation is strongly reduced (by ca. 1.8 m w.e. a−1) by the debris cover. The insulating effect of the debris cover has a larger effect on total mass loss than the enhanced ice ablation due to supraglacial ponds and exposed ice cliffs. This finding contradicts earlier geodetic studies and should be considered for modelling the future evolution of debris-covered glaciers. |
author2 |
Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ) 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 Grenoble Alpes 2016-2019 (UGA 2016-2019 )-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)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) International Centre for Integrated Mountain Development (ICIMOD) Laboratoire d'étude des transferts en hydrologie et environnement (LTHE) Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ) 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 Grenoble Alpes 2016-2019 (UGA 2016-2019 )-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 Grenoble Alpes 2016-2019 (UGA 2016-2019 ) Universiteit Utrecht / Utrecht University Utrecht Nepal Academy of Science and Technology Universidad Mayor de San Andrés (UMSA) 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 Environmental Science and Engineering Dulikhel Kathmandu University |
format |
Article in Journal/Newspaper |
author |
Vincent, Christian Wagnon, Patrick, W Shea, Joseph, M Immerzeel, Walter, W Kraaijenbrink, Philip Shrestha, Dibas Soruco, Alvaro, M Arnaud, Yves Brun, Fanny Berthier, Etienne Sherpa, Sonam, Futi |
author_facet |
Vincent, Christian Wagnon, Patrick, W Shea, Joseph, M Immerzeel, Walter, W Kraaijenbrink, Philip Shrestha, Dibas Soruco, Alvaro, M Arnaud, Yves Brun, Fanny Berthier, Etienne Sherpa, Sonam, Futi |
author_sort |
Vincent, Christian |
title |
Reduced melt on debris-covered glaciers: investigations from Changri Nup Glacier, Nepal |
title_short |
Reduced melt on debris-covered glaciers: investigations from Changri Nup Glacier, Nepal |
title_full |
Reduced melt on debris-covered glaciers: investigations from Changri Nup Glacier, Nepal |
title_fullStr |
Reduced melt on debris-covered glaciers: investigations from Changri Nup Glacier, Nepal |
title_full_unstemmed |
Reduced melt on debris-covered glaciers: investigations from Changri Nup Glacier, Nepal |
title_sort |
reduced melt on debris-covered glaciers: investigations from changri nup glacier, nepal |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://insu.hal.science/insu-01389475 https://insu.hal.science/insu-01389475/document https://insu.hal.science/insu-01389475/file/CRYOSPHERE%20-%20Reduced%20melt%20on%20debris-covered%20glaciers%20investigations%20from%20Changri%20Nup%20Glacier%20Nepal.pdf https://doi.org/10.5194/tc-10-1845-2016 |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_source |
ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://insu.hal.science/insu-01389475 The Cryosphere, 2016, 10, pp.1845 - 1858. ⟨10.5194/tc-10-1845-2016⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-10-1845-2016 insu-01389475 https://insu.hal.science/insu-01389475 https://insu.hal.science/insu-01389475/document https://insu.hal.science/insu-01389475/file/CRYOSPHERE%20-%20Reduced%20melt%20on%20debris-covered%20glaciers%20investigations%20from%20Changri%20Nup%20Glacier%20Nepal.pdf doi:10.5194/tc-10-1845-2016 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/tc-10-1845-2016 |
container_title |
The Cryosphere |
container_volume |
10 |
container_issue |
4 |
container_start_page |
1845 |
op_container_end_page |
1858 |
_version_ |
1797571080599109632 |
spelling |
ftinsu:oai:HAL:insu-01389475v1 2024-04-28T08:40:27+00:00 Reduced melt on debris-covered glaciers: investigations from Changri Nup Glacier, Nepal Vincent, Christian Wagnon, Patrick, W Shea, Joseph, M Immerzeel, Walter, W Kraaijenbrink, Philip Shrestha, Dibas Soruco, Alvaro, M Arnaud, Yves Brun, Fanny Berthier, Etienne Sherpa, Sonam, Futi Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ) 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 Grenoble Alpes 2016-2019 (UGA 2016-2019 )-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)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) International Centre for Integrated Mountain Development (ICIMOD) Laboratoire d'étude des transferts en hydrologie et environnement (LTHE) Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ) 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 Grenoble Alpes 2016-2019 (UGA 2016-2019 )-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 Grenoble Alpes 2016-2019 (UGA 2016-2019 ) Universiteit Utrecht / Utrecht University Utrecht Nepal Academy of Science and Technology Universidad Mayor de San Andrés (UMSA) 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 Environmental Science and Engineering Dulikhel Kathmandu University 2016 https://insu.hal.science/insu-01389475 https://insu.hal.science/insu-01389475/document https://insu.hal.science/insu-01389475/file/CRYOSPHERE%20-%20Reduced%20melt%20on%20debris-covered%20glaciers%20investigations%20from%20Changri%20Nup%20Glacier%20Nepal.pdf https://doi.org/10.5194/tc-10-1845-2016 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-10-1845-2016 insu-01389475 https://insu.hal.science/insu-01389475 https://insu.hal.science/insu-01389475/document https://insu.hal.science/insu-01389475/file/CRYOSPHERE%20-%20Reduced%20melt%20on%20debris-covered%20glaciers%20investigations%20from%20Changri%20Nup%20Glacier%20Nepal.pdf doi:10.5194/tc-10-1845-2016 info:eu-repo/semantics/OpenAccess ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://insu.hal.science/insu-01389475 The Cryosphere, 2016, 10, pp.1845 - 1858. ⟨10.5194/tc-10-1845-2016⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2016 ftinsu https://doi.org/10.5194/tc-10-1845-2016 2024-04-05T00:48:45Z International audience Approximately 25 % of the glacierized area in the Everest region is covered by debris, yet the surface mass balance of debris-covered portions of these glaciers has not been measured directly. In this study, ground-based measurements of surface elevation and ice depth are combined with terrestrial photogrammetry, unmanned aerial vehicle (UAV) and satellite elevation models to derive the surface mass balance of the debris-covered tongue of Changri Nup Glacier, located in the Everest region. Over the debris-covered tongue, the mean elevation change between 2011 and 2015 is −0.93 m year−1 or −0.84 m water equivalent per year (w.e. a−1). The mean emergence velocity over this region, estimated from the total ice flux through a cross section immediately above the debris-covered zone, is +0.37 m w.e. a−1. The debris-covered portion of the glacier thus has an area-averaged mass balance of −1.21 ± 0.2 m w.e. a−1 between 5240 and 5525 m above sea level (m a.s.l.). Surface mass balances observed on nearby debris-free glaciers suggest that the ablation is strongly reduced (by ca. 1.8 m w.e. a−1) by the debris cover. The insulating effect of the debris cover has a larger effect on total mass loss than the enhanced ice ablation due to supraglacial ponds and exposed ice cliffs. This finding contradicts earlier geodetic studies and should be considered for modelling the future evolution of debris-covered glaciers. Article in Journal/Newspaper The Cryosphere Institut national des sciences de l'Univers: HAL-INSU The Cryosphere 10 4 1845 1858 |