Resolving Seasonal Ice Velocity of 45 Greenlandic Glaciers With Very High Temporal Details
Seasonal glacier ice velocities are important for understanding controlling mechanisms of ice flow. For many Greenlandic glaciers, however, these measurements are limited by low temporal resolution. We present seasonal ice velocity changes, melt season onset and extent, and ice front positions for 4...
Published in: | Geophysical Research Letters |
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Language: | English |
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2019
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Online Access: | https://orbit.dtu.dk/en/publications/1c748f1f-9a18-40be-a386-2d8df37b32cb https://doi.org/10.1029/2018GL081503 https://backend.orbit.dtu.dk/ws/files/169254604/Vijay_et_al_2019_Geophysical_Research_Letters.pdf |
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ftdtupubl:oai:pure.atira.dk:publications/1c748f1f-9a18-40be-a386-2d8df37b32cb 2024-09-15T18:07:46+00:00 Resolving Seasonal Ice Velocity of 45 Greenlandic Glaciers With Very High Temporal Details Vijay, Saurabh Khan, Shfaqat Abbas Kusk, Anders Solgaard, Anne M. Moon, Twila Bjørk, Anders Anker 2019 application/pdf https://orbit.dtu.dk/en/publications/1c748f1f-9a18-40be-a386-2d8df37b32cb https://doi.org/10.1029/2018GL081503 https://backend.orbit.dtu.dk/ws/files/169254604/Vijay_et_al_2019_Geophysical_Research_Letters.pdf eng eng https://orbit.dtu.dk/en/publications/1c748f1f-9a18-40be-a386-2d8df37b32cb info:eu-repo/semantics/openAccess Vijay , S , Khan , S A , Kusk , A , Solgaard , A M , Moon , T & Bjørk , A A 2019 , ' Resolving Seasonal Ice Velocity of 45 Greenlandic Glaciers With Very High Temporal Details ' , Geophysical Research Letters , vol. 46 , pp. 1485-1495 . https://doi.org/10.1029/2018GL081503 article 2019 ftdtupubl https://doi.org/10.1029/2018GL081503 2024-07-01T23:52:53Z Seasonal glacier ice velocities are important for understanding controlling mechanisms of ice flow. For many Greenlandic glaciers, however, these measurements are limited by low temporal resolution. We present seasonal ice velocity changes, melt season onset and extent, and ice front positions for 45 Greenlandic glaciers using 2015–2017 Sentinel-1 synthetic aperture radar data. Seasonal velocity fluctuations of roughly half of the glaciers appear to be primarily controlled by surface melt-induced changes in the subglacial hydrology. This includes (1) glaciers that speed up with the onset of surface melt and (2) glaciers with comparable late winter and early melt season velocities that show significant slowdown during most of the melt season and speedup during winter. In contrast, less than a quarter of the study glaciers show strong correspondence between seasonal ice speed and terminus changes. Our results pinpoint seasonal variations across Greenland, highlighting the variable influence of meltwater on year-round ice velocities. Article in Journal/Newspaper glacier Greenland greenlandic Technical University of Denmark: DTU Orbit Geophysical Research Letters 46 3 1485 1495 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
description |
Seasonal glacier ice velocities are important for understanding controlling mechanisms of ice flow. For many Greenlandic glaciers, however, these measurements are limited by low temporal resolution. We present seasonal ice velocity changes, melt season onset and extent, and ice front positions for 45 Greenlandic glaciers using 2015–2017 Sentinel-1 synthetic aperture radar data. Seasonal velocity fluctuations of roughly half of the glaciers appear to be primarily controlled by surface melt-induced changes in the subglacial hydrology. This includes (1) glaciers that speed up with the onset of surface melt and (2) glaciers with comparable late winter and early melt season velocities that show significant slowdown during most of the melt season and speedup during winter. In contrast, less than a quarter of the study glaciers show strong correspondence between seasonal ice speed and terminus changes. Our results pinpoint seasonal variations across Greenland, highlighting the variable influence of meltwater on year-round ice velocities. |
format |
Article in Journal/Newspaper |
author |
Vijay, Saurabh Khan, Shfaqat Abbas Kusk, Anders Solgaard, Anne M. Moon, Twila Bjørk, Anders Anker |
spellingShingle |
Vijay, Saurabh Khan, Shfaqat Abbas Kusk, Anders Solgaard, Anne M. Moon, Twila Bjørk, Anders Anker Resolving Seasonal Ice Velocity of 45 Greenlandic Glaciers With Very High Temporal Details |
author_facet |
Vijay, Saurabh Khan, Shfaqat Abbas Kusk, Anders Solgaard, Anne M. Moon, Twila Bjørk, Anders Anker |
author_sort |
Vijay, Saurabh |
title |
Resolving Seasonal Ice Velocity of 45 Greenlandic Glaciers With Very High Temporal Details |
title_short |
Resolving Seasonal Ice Velocity of 45 Greenlandic Glaciers With Very High Temporal Details |
title_full |
Resolving Seasonal Ice Velocity of 45 Greenlandic Glaciers With Very High Temporal Details |
title_fullStr |
Resolving Seasonal Ice Velocity of 45 Greenlandic Glaciers With Very High Temporal Details |
title_full_unstemmed |
Resolving Seasonal Ice Velocity of 45 Greenlandic Glaciers With Very High Temporal Details |
title_sort |
resolving seasonal ice velocity of 45 greenlandic glaciers with very high temporal details |
publishDate |
2019 |
url |
https://orbit.dtu.dk/en/publications/1c748f1f-9a18-40be-a386-2d8df37b32cb https://doi.org/10.1029/2018GL081503 https://backend.orbit.dtu.dk/ws/files/169254604/Vijay_et_al_2019_Geophysical_Research_Letters.pdf |
genre |
glacier Greenland greenlandic |
genre_facet |
glacier Greenland greenlandic |
op_source |
Vijay , S , Khan , S A , Kusk , A , Solgaard , A M , Moon , T & Bjørk , A A 2019 , ' Resolving Seasonal Ice Velocity of 45 Greenlandic Glaciers With Very High Temporal Details ' , Geophysical Research Letters , vol. 46 , pp. 1485-1495 . https://doi.org/10.1029/2018GL081503 |
op_relation |
https://orbit.dtu.dk/en/publications/1c748f1f-9a18-40be-a386-2d8df37b32cb |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2018GL081503 |
container_title |
Geophysical Research Letters |
container_volume |
46 |
container_issue |
3 |
container_start_page |
1485 |
op_container_end_page |
1495 |
_version_ |
1810445135140356096 |