Recurring dynamically induced thinning during 1985 to 2010 on Upernavik Isstrom, West Greenland
Many glaciers along the southeast and northwest coasts of Greenland have accelerated, increasing the ice sheet's contribution to global sea-level rise. In this article, we map elevation changes on Upernavik Isstrom (UI), West Greenland, during 2003 to 2009 using high-resolution ice, cloud and l...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/322209 2023-11-12T03:59:54+01:00 Recurring dynamically induced thinning during 1985 to 2010 on Upernavik Isstrom, West Greenland Khan, Shfaqat Abbas Kjaer, Kurt H. Korsgaard, Niels J. Wahr, John Joughin, Ian R. Timm, Lars H. Bamber, Jonathan L. van den Broeke, Michiel R. Stearns, Leigh A. Hamilton, Gordon S. Csatho, Bea M. Nielsen, Karina Hurkmans, Ruud Babonis, Greg Sub Dynamics Meteorology Marine and Atmospheric Research 2013-03 image/pdf https://dspace.library.uu.nl/handle/1874/322209 en eng 2169-9003 https://dspace.library.uu.nl/handle/1874/322209 info:eu-repo/semantics/OpenAccess ICE-SHEET CRUSTAL UPLIFT MASS-LOSS VARIABILITY ELEVATION GRACE ACCELERATION GLACIER MODEL Article 2013 ftunivutrecht 2023-11-01T23:13:11Z Many glaciers along the southeast and northwest coasts of Greenland have accelerated, increasing the ice sheet's contribution to global sea-level rise. In this article, we map elevation changes on Upernavik Isstrom (UI), West Greenland, during 2003 to 2009 using high-resolution ice, cloud and land elevation satellite laser altimeter data supplemented with altimeter surveys from NASA's Airborne Topographic Mapper during 2002 to 2010. To assess thinning prior to 2002, we analyze aerial photographs from 1985. We document at least two distinct periods of dynamically induced ice loss during 1985 to 2010 characterized by a rapid retreat of the calving front, increased ice speed, and lowering of the ice surface. The first period occurred before 1991, whereas the latter occurred during 2005 to 2009. Analyses of air and sea-surface temperature suggest a combination of relatively warm air and ocean water as a potential trigger for the dynamically induced ice loss. We estimate a total catchment-wide ice-mass loss of UI caused by the two events of 72.3 +/- 15.8 Gt during 1985 to 2010, whereas the total melt-induced ice-mass loss during this same period is 19.8 +/- 2.8 Gt. Thus, 79% of the total ice-mass loss of the UI catchment was caused by ice dynamics, indicating the importance of including dynamically induced ice loss in the total mass change budget of the Greenland ice sheet. Article in Journal/Newspaper Airborne Topographic Mapper glacier Greenland Ice Sheet Upernavik Utrecht University Repository Greenland |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
ICE-SHEET CRUSTAL UPLIFT MASS-LOSS VARIABILITY ELEVATION GRACE ACCELERATION GLACIER MODEL |
spellingShingle |
ICE-SHEET CRUSTAL UPLIFT MASS-LOSS VARIABILITY ELEVATION GRACE ACCELERATION GLACIER MODEL Khan, Shfaqat Abbas Kjaer, Kurt H. Korsgaard, Niels J. Wahr, John Joughin, Ian R. Timm, Lars H. Bamber, Jonathan L. van den Broeke, Michiel R. Stearns, Leigh A. Hamilton, Gordon S. Csatho, Bea M. Nielsen, Karina Hurkmans, Ruud Babonis, Greg Recurring dynamically induced thinning during 1985 to 2010 on Upernavik Isstrom, West Greenland |
topic_facet |
ICE-SHEET CRUSTAL UPLIFT MASS-LOSS VARIABILITY ELEVATION GRACE ACCELERATION GLACIER MODEL |
description |
Many glaciers along the southeast and northwest coasts of Greenland have accelerated, increasing the ice sheet's contribution to global sea-level rise. In this article, we map elevation changes on Upernavik Isstrom (UI), West Greenland, during 2003 to 2009 using high-resolution ice, cloud and land elevation satellite laser altimeter data supplemented with altimeter surveys from NASA's Airborne Topographic Mapper during 2002 to 2010. To assess thinning prior to 2002, we analyze aerial photographs from 1985. We document at least two distinct periods of dynamically induced ice loss during 1985 to 2010 characterized by a rapid retreat of the calving front, increased ice speed, and lowering of the ice surface. The first period occurred before 1991, whereas the latter occurred during 2005 to 2009. Analyses of air and sea-surface temperature suggest a combination of relatively warm air and ocean water as a potential trigger for the dynamically induced ice loss. We estimate a total catchment-wide ice-mass loss of UI caused by the two events of 72.3 +/- 15.8 Gt during 1985 to 2010, whereas the total melt-induced ice-mass loss during this same period is 19.8 +/- 2.8 Gt. Thus, 79% of the total ice-mass loss of the UI catchment was caused by ice dynamics, indicating the importance of including dynamically induced ice loss in the total mass change budget of the Greenland ice sheet. |
author2 |
Sub Dynamics Meteorology Marine and Atmospheric Research |
format |
Article in Journal/Newspaper |
author |
Khan, Shfaqat Abbas Kjaer, Kurt H. Korsgaard, Niels J. Wahr, John Joughin, Ian R. Timm, Lars H. Bamber, Jonathan L. van den Broeke, Michiel R. Stearns, Leigh A. Hamilton, Gordon S. Csatho, Bea M. Nielsen, Karina Hurkmans, Ruud Babonis, Greg |
author_facet |
Khan, Shfaqat Abbas Kjaer, Kurt H. Korsgaard, Niels J. Wahr, John Joughin, Ian R. Timm, Lars H. Bamber, Jonathan L. van den Broeke, Michiel R. Stearns, Leigh A. Hamilton, Gordon S. Csatho, Bea M. Nielsen, Karina Hurkmans, Ruud Babonis, Greg |
author_sort |
Khan, Shfaqat Abbas |
title |
Recurring dynamically induced thinning during 1985 to 2010 on Upernavik Isstrom, West Greenland |
title_short |
Recurring dynamically induced thinning during 1985 to 2010 on Upernavik Isstrom, West Greenland |
title_full |
Recurring dynamically induced thinning during 1985 to 2010 on Upernavik Isstrom, West Greenland |
title_fullStr |
Recurring dynamically induced thinning during 1985 to 2010 on Upernavik Isstrom, West Greenland |
title_full_unstemmed |
Recurring dynamically induced thinning during 1985 to 2010 on Upernavik Isstrom, West Greenland |
title_sort |
recurring dynamically induced thinning during 1985 to 2010 on upernavik isstrom, west greenland |
publishDate |
2013 |
url |
https://dspace.library.uu.nl/handle/1874/322209 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Airborne Topographic Mapper glacier Greenland Ice Sheet Upernavik |
genre_facet |
Airborne Topographic Mapper glacier Greenland Ice Sheet Upernavik |
op_relation |
2169-9003 https://dspace.library.uu.nl/handle/1874/322209 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782339969544617984 |