Rapid dynamic thinning events during 1985-2010 on Upernavik Isstrøm, West Greenland:C21C-04

Many glaciers along the southeast and northwest coast of Greenland have accelerated, increasing the ice sheet's contribution to global sea-level rise. Here, we map elevation changes on Upernavik Isstrøm (UI), West Greenland, during 2003-2009 using high-resolution Ice, Cloud and land Elevation S...

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Main Authors: Khan, Shfaqat Abbas, Kjær, Kurt H., Korsgaard, Niels Jákup, Wahr, John M, Joughin, Ian R, Bamber, Jonathan L, Csatho, Beata M, Broeke, Michiel R van den, Stearns, Leigh A, Nielsen, Karina, Babonis, Gregory S, Hamilton, Gordon S, Hurkmans, Ruud TWL, Timm, Lars H
Format: Conference Object
Language:English
Published: 2011
Subjects:
Online Access:https://curis.ku.dk/portal/da/publications/rapid-dynamic-thinning-events-during-19852010-on-upernavik-isstroem-west-greenland(a6c59f93-7bc2-4090-baa5-dda87328cb10).html
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record_format openpolar
spelling ftcopenhagenunip:oai:pure.atira.dk:publications/a6c59f93-7bc2-4090-baa5-dda87328cb10 2023-05-15T13:07:32+02:00 Rapid dynamic thinning events during 1985-2010 on Upernavik Isstrøm, West Greenland:C21C-04 Khan, Shfaqat Abbas Kjær, Kurt H. Korsgaard, Niels Jákup Wahr, John M Joughin, Ian R Bamber, Jonathan L Csatho, Beata M Broeke, Michiel R van den Stearns, Leigh A Nielsen, Karina Babonis, Gregory S Hamilton, Gordon S Hurkmans, Ruud TWL Timm, Lars H 2011-12 https://curis.ku.dk/portal/da/publications/rapid-dynamic-thinning-events-during-19852010-on-upernavik-isstroem-west-greenland(a6c59f93-7bc2-4090-baa5-dda87328cb10).html eng eng info:eu-repo/semantics/restrictedAccess Khan , S A , Kjær , K H , Korsgaard , N J , Wahr , J M , Joughin , I R , Bamber , J L , Csatho , B M , Broeke , M R V D , Stearns , L A , Nielsen , K , Babonis , G S , Hamilton , G S , Hurkmans , R TWL & Timm , L H 2011 , ' Rapid dynamic thinning events during 1985-2010 on Upernavik Isstrøm, West Greenland : C21C-04 ' , American Geophysical Union Fall Meeting 2011 , San Francisco , United States , 05/12/2011 - 09/12/2011 . conferenceObject 2011 ftcopenhagenunip 2022-12-28T23:53:49Z Many glaciers along the southeast and northwest coast of Greenland have accelerated, increasing the ice sheet's contribution to global sea-level rise. Here, we map elevation changes on Upernavik Isstrøm (UI), West Greenland, during 2003-2009 using high-resolution Ice, Cloud and land Elevation Satellite (ICESat) laser altimeter data supplemented with altimeter surveys from NASA's Airborne Topographic Mapper (ATM) during 2002-2010. To assess thinning prior to 2002, we analyze aerial photographs from 1985. We document at least two distinct ice loss events characterized by rapid dynamic thinning, increased ice speed, and a retreat of the calving front. The most recent event coincides with the speedup of several glaciers along the northwest coast of Greenland in 2005, and with changes in the rate of mass loss observed using data from the Gravity Recovery and Climate Experiment (GRACE) satellite gravity mission. The first event of increased ice loss could have also taken place along the extended northwest coast. The total dynamic induced ice volume loss on the frontal portion of UI caused by the two events is 45.5 +/- 5.4 km3 (during 1985-2010), while the total melt induced ice volume loss during this same period is 7.4 +/- 1.3 km3. Conference Object Airborne Topographic Mapper Greenland Upernavik University of Copenhagen: Research Greenland Upernavik Isstrøm ENVELOPE(-54.500,-54.500,72.917,72.917)
institution Open Polar
collection University of Copenhagen: Research
op_collection_id ftcopenhagenunip
language English
description Many glaciers along the southeast and northwest coast of Greenland have accelerated, increasing the ice sheet's contribution to global sea-level rise. Here, we map elevation changes on Upernavik Isstrøm (UI), West Greenland, during 2003-2009 using high-resolution Ice, Cloud and land Elevation Satellite (ICESat) laser altimeter data supplemented with altimeter surveys from NASA's Airborne Topographic Mapper (ATM) during 2002-2010. To assess thinning prior to 2002, we analyze aerial photographs from 1985. We document at least two distinct ice loss events characterized by rapid dynamic thinning, increased ice speed, and a retreat of the calving front. The most recent event coincides with the speedup of several glaciers along the northwest coast of Greenland in 2005, and with changes in the rate of mass loss observed using data from the Gravity Recovery and Climate Experiment (GRACE) satellite gravity mission. The first event of increased ice loss could have also taken place along the extended northwest coast. The total dynamic induced ice volume loss on the frontal portion of UI caused by the two events is 45.5 +/- 5.4 km3 (during 1985-2010), while the total melt induced ice volume loss during this same period is 7.4 +/- 1.3 km3.
format Conference Object
author Khan, Shfaqat Abbas
Kjær, Kurt H.
Korsgaard, Niels Jákup
Wahr, John M
Joughin, Ian R
Bamber, Jonathan L
Csatho, Beata M
Broeke, Michiel R van den
Stearns, Leigh A
Nielsen, Karina
Babonis, Gregory S
Hamilton, Gordon S
Hurkmans, Ruud TWL
Timm, Lars H
spellingShingle Khan, Shfaqat Abbas
Kjær, Kurt H.
Korsgaard, Niels Jákup
Wahr, John M
Joughin, Ian R
Bamber, Jonathan L
Csatho, Beata M
Broeke, Michiel R van den
Stearns, Leigh A
Nielsen, Karina
Babonis, Gregory S
Hamilton, Gordon S
Hurkmans, Ruud TWL
Timm, Lars H
Rapid dynamic thinning events during 1985-2010 on Upernavik Isstrøm, West Greenland:C21C-04
author_facet Khan, Shfaqat Abbas
Kjær, Kurt H.
Korsgaard, Niels Jákup
Wahr, John M
Joughin, Ian R
Bamber, Jonathan L
Csatho, Beata M
Broeke, Michiel R van den
Stearns, Leigh A
Nielsen, Karina
Babonis, Gregory S
Hamilton, Gordon S
Hurkmans, Ruud TWL
Timm, Lars H
author_sort Khan, Shfaqat Abbas
title Rapid dynamic thinning events during 1985-2010 on Upernavik Isstrøm, West Greenland:C21C-04
title_short Rapid dynamic thinning events during 1985-2010 on Upernavik Isstrøm, West Greenland:C21C-04
title_full Rapid dynamic thinning events during 1985-2010 on Upernavik Isstrøm, West Greenland:C21C-04
title_fullStr Rapid dynamic thinning events during 1985-2010 on Upernavik Isstrøm, West Greenland:C21C-04
title_full_unstemmed Rapid dynamic thinning events during 1985-2010 on Upernavik Isstrøm, West Greenland:C21C-04
title_sort rapid dynamic thinning events during 1985-2010 on upernavik isstrøm, west greenland:c21c-04
publishDate 2011
url https://curis.ku.dk/portal/da/publications/rapid-dynamic-thinning-events-during-19852010-on-upernavik-isstroem-west-greenland(a6c59f93-7bc2-4090-baa5-dda87328cb10).html
long_lat ENVELOPE(-54.500,-54.500,72.917,72.917)
geographic Greenland
Upernavik Isstrøm
geographic_facet Greenland
Upernavik Isstrøm
genre Airborne Topographic Mapper
Greenland
Upernavik
genre_facet Airborne Topographic Mapper
Greenland
Upernavik
op_source Khan , S A , Kjær , K H , Korsgaard , N J , Wahr , J M , Joughin , I R , Bamber , J L , Csatho , B M , Broeke , M R V D , Stearns , L A , Nielsen , K , Babonis , G S , Hamilton , G S , Hurkmans , R TWL & Timm , L H 2011 , ' Rapid dynamic thinning events during 1985-2010 on Upernavik Isstrøm, West Greenland : C21C-04 ' , American Geophysical Union Fall Meeting 2011 , San Francisco , United States , 05/12/2011 - 09/12/2011 .
op_rights info:eu-repo/semantics/restrictedAccess
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