Glacial lake evolution and glacier–lake interactions in the Poiqu River basin, central Himalaya, 1964–2017
Despite previous studies, glacier–lake interactions and future lake development in the Poiqu River basin, central Himalaya, are still not well understood. We mapped glacial lakes, glaciers, their frontal positions and ice flow from optical remote sensing data, and calculated glacier surface elevatio...
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International Glaciological Society
2019
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Online Access: | https://www.zora.uzh.ch/id/eprint/177466/ https://www.zora.uzh.ch/id/eprint/177466/1/2019_Zhang_glacial_lake_evolution_and_glacierlake_interactions_in_the_poiqu_river_basin_central_himalaya_19642017.pdf https://doi.org/10.5167/uzh-177466 https://doi.org/10.1017/jog.2019.13 |
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ftunivzuerich:oai:www.zora.uzh.ch:177466 2024-09-30T14:37:52+00:00 Glacial lake evolution and glacier–lake interactions in the Poiqu River basin, central Himalaya, 1964–2017 Zhang, Guoqing Bolch, Tobias Allen, Simon Linsbauer, Andreas Chen, Wenfeng Wang, Weicai 2019-06-01 application/pdf https://www.zora.uzh.ch/id/eprint/177466/ https://www.zora.uzh.ch/id/eprint/177466/1/2019_Zhang_glacial_lake_evolution_and_glacierlake_interactions_in_the_poiqu_river_basin_central_himalaya_19642017.pdf https://doi.org/10.5167/uzh-177466 https://doi.org/10.1017/jog.2019.13 eng eng International Glaciological Society https://www.zora.uzh.ch/id/eprint/177466/1/2019_Zhang_glacial_lake_evolution_and_glacierlake_interactions_in_the_poiqu_river_basin_central_himalaya_19642017.pdf doi:10.5167/uzh-177466 doi:10.1017/jog.2019.13 urn:issn:0022-1430 info:eu-repo/semantics/openAccess Creative Commons: Attribution 4.0 International (CC BY 4.0) http://creativecommons.org/licenses/by/4.0/ Zhang, Guoqing; Bolch, Tobias; Allen, Simon; Linsbauer, Andreas; Chen, Wenfeng; Wang, Weicai (2019). Glacial lake evolution and glacier–lake interactions in the Poiqu River basin, central Himalaya, 1964–2017. Journal of Glaciology, 65(251):347-365. Institute of Geography 910 Geography & travel Earth-Surface Processes Journal Article PeerReviewed info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2019 ftunivzuerich https://doi.org/10.5167/uzh-17746610.1017/jog.2019.13 2024-09-04T00:39:06Z Despite previous studies, glacier–lake interactions and future lake development in the Poiqu River basin, central Himalaya, are still not well understood. We mapped glacial lakes, glaciers, their frontal positions and ice flow from optical remote sensing data, and calculated glacier surface elevation change from digital terrain models. During 1964–2017, the total glacial-lake area increased by ~110%. Glaciers retreated with an average rate of ~1.4 km² a⁻¹ between 1975 and 2015. Based on rapid area expansion (>150%), and information from previous studies, eight lakes were considered to be potentially dangerous glacial lakes. Corresponding lake-terminating glaciers showed an overall retreat of 6.0 ± 1.4 to 26.6 ± 1.1 m a⁻¹ and accompanying lake expansion. The regional mean glacier elevation change was −0.39 ± 0.13 m a⁻¹ while the glaciers associated with the eight potentially dangerous lakes lowered by −0.71 ± 0.05 m a⁻¹ from 1974 to 2017. The mean ice flow speed of these glaciers was ~10 m a⁻¹ from 2013 to 2017; about double the mean for the entire study area. Analysis of these data along with climate observations suggests that ice melting and calving processes play the dominant role in driving lake enlargement. Modelling of future lake development shows where new lakes might emerge and existing lakes could expand with projected glacial recession. Article in Journal/Newspaper Journal of Glaciology University of Zurich (UZH): ZORA (Zurich Open Repository and Archive Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) New Lakes ENVELOPE(177.649,177.649,51.951,51.951) |
institution |
Open Polar |
collection |
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive |
op_collection_id |
ftunivzuerich |
language |
English |
topic |
Institute of Geography 910 Geography & travel Earth-Surface Processes |
spellingShingle |
Institute of Geography 910 Geography & travel Earth-Surface Processes Zhang, Guoqing Bolch, Tobias Allen, Simon Linsbauer, Andreas Chen, Wenfeng Wang, Weicai Glacial lake evolution and glacier–lake interactions in the Poiqu River basin, central Himalaya, 1964–2017 |
topic_facet |
Institute of Geography 910 Geography & travel Earth-Surface Processes |
description |
Despite previous studies, glacier–lake interactions and future lake development in the Poiqu River basin, central Himalaya, are still not well understood. We mapped glacial lakes, glaciers, their frontal positions and ice flow from optical remote sensing data, and calculated glacier surface elevation change from digital terrain models. During 1964–2017, the total glacial-lake area increased by ~110%. Glaciers retreated with an average rate of ~1.4 km² a⁻¹ between 1975 and 2015. Based on rapid area expansion (>150%), and information from previous studies, eight lakes were considered to be potentially dangerous glacial lakes. Corresponding lake-terminating glaciers showed an overall retreat of 6.0 ± 1.4 to 26.6 ± 1.1 m a⁻¹ and accompanying lake expansion. The regional mean glacier elevation change was −0.39 ± 0.13 m a⁻¹ while the glaciers associated with the eight potentially dangerous lakes lowered by −0.71 ± 0.05 m a⁻¹ from 1974 to 2017. The mean ice flow speed of these glaciers was ~10 m a⁻¹ from 2013 to 2017; about double the mean for the entire study area. Analysis of these data along with climate observations suggests that ice melting and calving processes play the dominant role in driving lake enlargement. Modelling of future lake development shows where new lakes might emerge and existing lakes could expand with projected glacial recession. |
format |
Article in Journal/Newspaper |
author |
Zhang, Guoqing Bolch, Tobias Allen, Simon Linsbauer, Andreas Chen, Wenfeng Wang, Weicai |
author_facet |
Zhang, Guoqing Bolch, Tobias Allen, Simon Linsbauer, Andreas Chen, Wenfeng Wang, Weicai |
author_sort |
Zhang, Guoqing |
title |
Glacial lake evolution and glacier–lake interactions in the Poiqu River basin, central Himalaya, 1964–2017 |
title_short |
Glacial lake evolution and glacier–lake interactions in the Poiqu River basin, central Himalaya, 1964–2017 |
title_full |
Glacial lake evolution and glacier–lake interactions in the Poiqu River basin, central Himalaya, 1964–2017 |
title_fullStr |
Glacial lake evolution and glacier–lake interactions in the Poiqu River basin, central Himalaya, 1964–2017 |
title_full_unstemmed |
Glacial lake evolution and glacier–lake interactions in the Poiqu River basin, central Himalaya, 1964–2017 |
title_sort |
glacial lake evolution and glacier–lake interactions in the poiqu river basin, central himalaya, 1964–2017 |
publisher |
International Glaciological Society |
publishDate |
2019 |
url |
https://www.zora.uzh.ch/id/eprint/177466/ https://www.zora.uzh.ch/id/eprint/177466/1/2019_Zhang_glacial_lake_evolution_and_glacierlake_interactions_in_the_poiqu_river_basin_central_himalaya_19642017.pdf https://doi.org/10.5167/uzh-177466 https://doi.org/10.1017/jog.2019.13 |
long_lat |
ENVELOPE(-129.463,-129.463,58.259,58.259) ENVELOPE(177.649,177.649,51.951,51.951) |
geographic |
Glacial Lake New Lakes |
geographic_facet |
Glacial Lake New Lakes |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Zhang, Guoqing; Bolch, Tobias; Allen, Simon; Linsbauer, Andreas; Chen, Wenfeng; Wang, Weicai (2019). Glacial lake evolution and glacier–lake interactions in the Poiqu River basin, central Himalaya, 1964–2017. Journal of Glaciology, 65(251):347-365. |
op_relation |
https://www.zora.uzh.ch/id/eprint/177466/1/2019_Zhang_glacial_lake_evolution_and_glacierlake_interactions_in_the_poiqu_river_basin_central_himalaya_19642017.pdf doi:10.5167/uzh-177466 doi:10.1017/jog.2019.13 urn:issn:0022-1430 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons: Attribution 4.0 International (CC BY 4.0) http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.5167/uzh-17746610.1017/jog.2019.13 |
_version_ |
1811640653569851392 |