Reduced melt on debris-covered glaciers: investigations from Changri Nup Glacier, Nepal
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 p...
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2016
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00011635 2023-05-15T18:32:32+02:00 Reduced melt on debris-covered glaciers: investigations from Changri Nup Glacier, Nepal Vincent, Christian Wagnon, Patrick Shea, Joseph M. Immerzeel, Walter W. Kraaijenbrink, Philip Shrestha, Dibas Soruco, Alvaro Arnaud, Yves Brun, Fanny Berthier, Etienne Sherpa, Sonam Futi 2016-08 electronic https://doi.org/10.5194/tc-10-1845-2016 https://noa.gwlb.de/receive/cop_mods_00011635 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00011592/tc-10-1845-2016.pdf https://tc.copernicus.org/articles/10/1845/2016/tc-10-1845-2016.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-10-1845-2016 https://noa.gwlb.de/receive/cop_mods_00011635 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00011592/tc-10-1845-2016.pdf https://tc.copernicus.org/articles/10/1845/2016/tc-10-1845-2016.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2016 ftnonlinearchiv https://doi.org/10.5194/tc-10-1845-2016 2022-02-08T22:56:25Z 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 Niedersächsisches Online-Archiv NOA The Cryosphere 10 4 1845 1858 |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Vincent, Christian Wagnon, Patrick Shea, Joseph M. Immerzeel, Walter W. Kraaijenbrink, Philip Shrestha, Dibas Soruco, Alvaro Arnaud, Yves Brun, Fanny Berthier, Etienne Sherpa, Sonam Futi Reduced melt on debris-covered glaciers: investigations from Changri Nup Glacier, Nepal |
topic_facet |
article Verlagsveröffentlichung |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Vincent, Christian Wagnon, Patrick Shea, Joseph M. Immerzeel, Walter W. Kraaijenbrink, Philip Shrestha, Dibas Soruco, Alvaro Arnaud, Yves Brun, Fanny Berthier, Etienne Sherpa, Sonam Futi |
author_facet |
Vincent, Christian Wagnon, Patrick Shea, Joseph M. Immerzeel, Walter W. Kraaijenbrink, Philip Shrestha, Dibas Soruco, Alvaro 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 |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/tc-10-1845-2016 https://noa.gwlb.de/receive/cop_mods_00011635 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00011592/tc-10-1845-2016.pdf https://tc.copernicus.org/articles/10/1845/2016/tc-10-1845-2016.pdf |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-10-1845-2016 https://noa.gwlb.de/receive/cop_mods_00011635 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00011592/tc-10-1845-2016.pdf https://tc.copernicus.org/articles/10/1845/2016/tc-10-1845-2016.pdf |
op_rights |
uneingeschränkt 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_ |
1766216644102717440 |