Estimating Ice Discharge at Greenland's Three Largest Outlet Glaciers Using Local Bedrock Uplift
peer reviewed We present a novel method to estimate dynamic ice loss of Greenland's three largest outlet glaciers: Jakobshavn Isbræ, Kangerlussuaq Glacier, and Helheim Glacier. We use Global Navigation Satellite System (GNSS) stations attached to bedrock to measure elastic displacements of the...
Published in: | Geophysical Research Letters |
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Main Authors: | , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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John Wiley and Sons Inc
2021
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Online Access: | https://orbi.uliege.be/handle/2268/301946 https://orbi.uliege.be/bitstream/2268/301946/1/Hansen_2021_GRL.pdf https://doi.org/10.1029/2021GL094252 |
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ftorbi:oai:orbi.ulg.ac.be:2268/301946 2024-04-21T08:02:26+00:00 Estimating Ice Discharge at Greenland's Three Largest Outlet Glaciers Using Local Bedrock Uplift Hansen, Karina Truffer, Martin Aschwanden, Andy Mankoff, Kenneth Bevis, Michael Humbert, Angelika van den Broeke, Michiel R. Noël, Brice Bjørk, Anders Colgan, William Kjær, Kurt H. Adhikari, Surendra Barletta, Valentina Khan, Shfaqat A. 2021-07-28 https://orbi.uliege.be/handle/2268/301946 https://orbi.uliege.be/bitstream/2268/301946/1/Hansen_2021_GRL.pdf https://doi.org/10.1029/2021GL094252 en eng John Wiley and Sons Inc https://onlinelibrary.wiley.com/doi/pdf/10.1029/2021GL094252 urn:issn:0094-8276 urn:issn:1944-8007 https://orbi.uliege.be/handle/2268/301946 info:hdl:2268/301946 https://orbi.uliege.be/bitstream/2268/301946/1/Hansen_2021_GRL.pdf doi:10.1029/2021GL094252 scopus-id:2-s2.0-85111492929 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess Geophysical Research Letters, 48 (14) (2021-07-28) glaciers Greenland ice discharge ice loss land uplift surface mass balance Dynamic thinning Elastic displacements Estimate dynamics Global Navigation Satellite Systems Ice discharges Short term Solid earth Geophysics Earth and Planetary Sciences (all) General Earth and Planetary Sciences Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2021 ftorbi https://doi.org/10.1029/2021GL094252 2024-03-27T14:57:53Z peer reviewed We present a novel method to estimate dynamic ice loss of Greenland's three largest outlet glaciers: Jakobshavn Isbræ, Kangerlussuaq Glacier, and Helheim Glacier. We use Global Navigation Satellite System (GNSS) stations attached to bedrock to measure elastic displacements of the solid Earth caused by dynamic thinning near the glacier terminus. When we compare our results with discharge, we find a time lag between glacier speedup/slowdown and onset of dynamic thinning/thickening. Our results show that dynamic thinning/thickening on Jakobshavn Isbræ occurs 0.87 ± 0.07 years before speedup/slowdown. This implies that using GNSS time series we are able to predict speedup/slowdown of Jakobshavn Isbræ by up to 10.4 months. For Kangerlussuaq Glacier the lag between thinning/thickening and speedup/slowdown is 0.37 ± 0.17 years (4.4 months). Our methodology and results could be important for studies that attempt to model and understand mechanisms controlling short-term dynamic fluctuations of outlet glaciers in Greenland. Article in Journal/Newspaper glacier Greenland Jakobshavn Jakobshavn isbræ Kangerlussuaq University of Liège: ORBi (Open Repository and Bibliography) Geophysical Research Letters 48 14 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
glaciers Greenland ice discharge ice loss land uplift surface mass balance Dynamic thinning Elastic displacements Estimate dynamics Global Navigation Satellite Systems Ice discharges Short term Solid earth Geophysics Earth and Planetary Sciences (all) General Earth and Planetary Sciences Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
glaciers Greenland ice discharge ice loss land uplift surface mass balance Dynamic thinning Elastic displacements Estimate dynamics Global Navigation Satellite Systems Ice discharges Short term Solid earth Geophysics Earth and Planetary Sciences (all) General Earth and Planetary Sciences Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Hansen, Karina Truffer, Martin Aschwanden, Andy Mankoff, Kenneth Bevis, Michael Humbert, Angelika van den Broeke, Michiel R. Noël, Brice Bjørk, Anders Colgan, William Kjær, Kurt H. Adhikari, Surendra Barletta, Valentina Khan, Shfaqat A. Estimating Ice Discharge at Greenland's Three Largest Outlet Glaciers Using Local Bedrock Uplift |
topic_facet |
glaciers Greenland ice discharge ice loss land uplift surface mass balance Dynamic thinning Elastic displacements Estimate dynamics Global Navigation Satellite Systems Ice discharges Short term Solid earth Geophysics Earth and Planetary Sciences (all) General Earth and Planetary Sciences Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
description |
peer reviewed We present a novel method to estimate dynamic ice loss of Greenland's three largest outlet glaciers: Jakobshavn Isbræ, Kangerlussuaq Glacier, and Helheim Glacier. We use Global Navigation Satellite System (GNSS) stations attached to bedrock to measure elastic displacements of the solid Earth caused by dynamic thinning near the glacier terminus. When we compare our results with discharge, we find a time lag between glacier speedup/slowdown and onset of dynamic thinning/thickening. Our results show that dynamic thinning/thickening on Jakobshavn Isbræ occurs 0.87 ± 0.07 years before speedup/slowdown. This implies that using GNSS time series we are able to predict speedup/slowdown of Jakobshavn Isbræ by up to 10.4 months. For Kangerlussuaq Glacier the lag between thinning/thickening and speedup/slowdown is 0.37 ± 0.17 years (4.4 months). Our methodology and results could be important for studies that attempt to model and understand mechanisms controlling short-term dynamic fluctuations of outlet glaciers in Greenland. |
format |
Article in Journal/Newspaper |
author |
Hansen, Karina Truffer, Martin Aschwanden, Andy Mankoff, Kenneth Bevis, Michael Humbert, Angelika van den Broeke, Michiel R. Noël, Brice Bjørk, Anders Colgan, William Kjær, Kurt H. Adhikari, Surendra Barletta, Valentina Khan, Shfaqat A. |
author_facet |
Hansen, Karina Truffer, Martin Aschwanden, Andy Mankoff, Kenneth Bevis, Michael Humbert, Angelika van den Broeke, Michiel R. Noël, Brice Bjørk, Anders Colgan, William Kjær, Kurt H. Adhikari, Surendra Barletta, Valentina Khan, Shfaqat A. |
author_sort |
Hansen, Karina |
title |
Estimating Ice Discharge at Greenland's Three Largest Outlet Glaciers Using Local Bedrock Uplift |
title_short |
Estimating Ice Discharge at Greenland's Three Largest Outlet Glaciers Using Local Bedrock Uplift |
title_full |
Estimating Ice Discharge at Greenland's Three Largest Outlet Glaciers Using Local Bedrock Uplift |
title_fullStr |
Estimating Ice Discharge at Greenland's Three Largest Outlet Glaciers Using Local Bedrock Uplift |
title_full_unstemmed |
Estimating Ice Discharge at Greenland's Three Largest Outlet Glaciers Using Local Bedrock Uplift |
title_sort |
estimating ice discharge at greenland's three largest outlet glaciers using local bedrock uplift |
publisher |
John Wiley and Sons Inc |
publishDate |
2021 |
url |
https://orbi.uliege.be/handle/2268/301946 https://orbi.uliege.be/bitstream/2268/301946/1/Hansen_2021_GRL.pdf https://doi.org/10.1029/2021GL094252 |
genre |
glacier Greenland Jakobshavn Jakobshavn isbræ Kangerlussuaq |
genre_facet |
glacier Greenland Jakobshavn Jakobshavn isbræ Kangerlussuaq |
op_source |
Geophysical Research Letters, 48 (14) (2021-07-28) |
op_relation |
https://onlinelibrary.wiley.com/doi/pdf/10.1029/2021GL094252 urn:issn:0094-8276 urn:issn:1944-8007 https://orbi.uliege.be/handle/2268/301946 info:hdl:2268/301946 https://orbi.uliege.be/bitstream/2268/301946/1/Hansen_2021_GRL.pdf doi:10.1029/2021GL094252 scopus-id:2-s2.0-85111492929 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2021GL094252 |
container_title |
Geophysical Research Letters |
container_volume |
48 |
container_issue |
14 |
_version_ |
1796942632461533184 |