The 2015 surge of Hispar Glacier in the Karakoram
The Karakoram mountain range is well known for its numerous surge-type glaciers of which several have recently surged or are still doing so. Analysis of multi-temporal satellite images and digital elevation models have revealed impressive details about the related changes (e.g., in glacier length, s...
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ftunivzuerich:oai:www.zora.uzh.ch:142413 2024-06-23T07:52:59+00:00 The 2015 surge of Hispar Glacier in the Karakoram Paul, Frank Strozzi, Tazio Schellenberger, Thomas Kääb, Andreas 2017 application/pdf https://www.zora.uzh.ch/id/eprint/142413/ https://www.zora.uzh.ch/id/eprint/142413/1/2017_remotesensing-09-00888-v4.pdf https://doi.org/10.5167/uzh-142413 https://doi.org/10.3390/rs9090888 eng eng MDPI Publishing https://www.zora.uzh.ch/id/eprint/142413/1/2017_remotesensing-09-00888-v4.pdf doi:10.5167/uzh-142413 doi:10.3390/rs9090888 urn:issn:2072-4292 info:eu-repo/semantics/openAccess Creative Commons: Attribution 4.0 International (CC BY 4.0) http://creativecommons.org/licenses/by/4.0/ Paul, Frank; Strozzi, Tazio; Schellenberger, Thomas; Kääb, Andreas (2017). The 2015 surge of Hispar Glacier in the Karakoram. Remote Sensing, 9(9):888. Institute of Geography 910 Geography & travel Journal Article PeerReviewed info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2017 ftunivzuerich https://doi.org/10.5167/uzh-14241310.3390/rs9090888 2024-05-29T00:41:00Z The Karakoram mountain range is well known for its numerous surge-type glaciers of which several have recently surged or are still doing so. Analysis of multi-temporal satellite images and digital elevation models have revealed impressive details about the related changes (e.g., in glacier length, surface elevation and flow velocities) and considerably expanded the database of known surge-type glaciers. One glacier that has so far only been reported as impacted by surging tributaries, rather than surging itself, is the 50 km long main trunk of Hispar Glacier in the Hunza catchment. We here present the evolution of flow velocities and surface features from its 2015/16 surge as revealed from a dense time series of SAR and optical images along with an analysis of historic satellite images. We observed maximum flow velocities of up to 14 m d−1 (5 km a−1) in spring 2015, sudden drops in summer velocities, a second increase in winter 2015/16 and a total advance of the surge front of about 6 km. During a few months the surge front velocity was much higher (about 90 m d−1) than the maximum flow velocity. We assume that one of its northern tributary glaciers, Yutmaru, initiated the surge at the end of summer 2014 and that the variability in flow velocities was driven by changes in the basal hydrologic regime (Alaska-type surge). We further provide evidence that Hispar Glacier has surged before (around 1960) over a distance of about 10 km so that it can also be regarded as a surge-type glacier. Article in Journal/Newspaper glacier glaciers Alaska University of Zurich (UZH): ZORA (Zurich Open Repository and Archive |
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 |
spellingShingle |
Institute of Geography 910 Geography & travel Paul, Frank Strozzi, Tazio Schellenberger, Thomas Kääb, Andreas The 2015 surge of Hispar Glacier in the Karakoram |
topic_facet |
Institute of Geography 910 Geography & travel |
description |
The Karakoram mountain range is well known for its numerous surge-type glaciers of which several have recently surged or are still doing so. Analysis of multi-temporal satellite images and digital elevation models have revealed impressive details about the related changes (e.g., in glacier length, surface elevation and flow velocities) and considerably expanded the database of known surge-type glaciers. One glacier that has so far only been reported as impacted by surging tributaries, rather than surging itself, is the 50 km long main trunk of Hispar Glacier in the Hunza catchment. We here present the evolution of flow velocities and surface features from its 2015/16 surge as revealed from a dense time series of SAR and optical images along with an analysis of historic satellite images. We observed maximum flow velocities of up to 14 m d−1 (5 km a−1) in spring 2015, sudden drops in summer velocities, a second increase in winter 2015/16 and a total advance of the surge front of about 6 km. During a few months the surge front velocity was much higher (about 90 m d−1) than the maximum flow velocity. We assume that one of its northern tributary glaciers, Yutmaru, initiated the surge at the end of summer 2014 and that the variability in flow velocities was driven by changes in the basal hydrologic regime (Alaska-type surge). We further provide evidence that Hispar Glacier has surged before (around 1960) over a distance of about 10 km so that it can also be regarded as a surge-type glacier. |
format |
Article in Journal/Newspaper |
author |
Paul, Frank Strozzi, Tazio Schellenberger, Thomas Kääb, Andreas |
author_facet |
Paul, Frank Strozzi, Tazio Schellenberger, Thomas Kääb, Andreas |
author_sort |
Paul, Frank |
title |
The 2015 surge of Hispar Glacier in the Karakoram |
title_short |
The 2015 surge of Hispar Glacier in the Karakoram |
title_full |
The 2015 surge of Hispar Glacier in the Karakoram |
title_fullStr |
The 2015 surge of Hispar Glacier in the Karakoram |
title_full_unstemmed |
The 2015 surge of Hispar Glacier in the Karakoram |
title_sort |
2015 surge of hispar glacier in the karakoram |
publisher |
MDPI Publishing |
publishDate |
2017 |
url |
https://www.zora.uzh.ch/id/eprint/142413/ https://www.zora.uzh.ch/id/eprint/142413/1/2017_remotesensing-09-00888-v4.pdf https://doi.org/10.5167/uzh-142413 https://doi.org/10.3390/rs9090888 |
genre |
glacier glaciers Alaska |
genre_facet |
glacier glaciers Alaska |
op_source |
Paul, Frank; Strozzi, Tazio; Schellenberger, Thomas; Kääb, Andreas (2017). The 2015 surge of Hispar Glacier in the Karakoram. Remote Sensing, 9(9):888. |
op_relation |
https://www.zora.uzh.ch/id/eprint/142413/1/2017_remotesensing-09-00888-v4.pdf doi:10.5167/uzh-142413 doi:10.3390/rs9090888 urn:issn:2072-4292 |
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-14241310.3390/rs9090888 |
_version_ |
1802644454933266432 |