Estimating Ice Discharge at Greenland's Three Largest Outlet Glaciers Using Local Bedrock Uplift
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 ca...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/412754 2023-12-10T09:48:50+01:00 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. Sub Dynamics Meteorology Marine and Atmospheric Research 2021-07-28 application/pdf https://dspace.library.uu.nl/handle/1874/412754 eng eng https://dspace.library.uu.nl/handle/1874/412754 info:eu-repo/semantics/OpenAccess 2021 ftunivutrecht 2023-11-15T23:18:08Z 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. Other/Unknown Material glacier Greenland Jakobshavn Jakobshavn isbræ Kangerlussuaq Utrecht University Repository Greenland Jakobshavn Isbræ ENVELOPE(-49.917,-49.917,69.167,69.167) Kangerlussuaq ENVELOPE(-55.633,-55.633,72.633,72.633) |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
description |
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. |
author2 |
Sub Dynamics Meteorology Marine and Atmospheric Research |
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. |
spellingShingle |
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 |
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 |
publishDate |
2021 |
url |
https://dspace.library.uu.nl/handle/1874/412754 |
long_lat |
ENVELOPE(-49.917,-49.917,69.167,69.167) ENVELOPE(-55.633,-55.633,72.633,72.633) |
geographic |
Greenland Jakobshavn Isbræ Kangerlussuaq |
geographic_facet |
Greenland Jakobshavn Isbræ Kangerlussuaq |
genre |
glacier Greenland Jakobshavn Jakobshavn isbræ Kangerlussuaq |
genre_facet |
glacier Greenland Jakobshavn Jakobshavn isbræ Kangerlussuaq |
op_relation |
https://dspace.library.uu.nl/handle/1874/412754 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1784893000951791616 |