Rapid dynamic thinning on Upernavik Icestream, West Greenland
The main outlet glaciers in Greenland have more than doubled their contribution to global sea level rise over the last decade. Several studies have shown increase in ice discharge from the main outlet glaciers (notably Kangerdlugssuaq (KG) and Helheim glaciers (HG) in Southeast Greenland, and Jakobs...
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ftdtupubl:oai:pure.atira.dk:publications/af5705ab-b410-423b-8e59-f4388e500adc 2024-09-15T17:35:21+00:00 Rapid dynamic thinning on Upernavik Icestream, West Greenland Khan, Shfaqat Abbas Kjær, Kurt H. Korsgaard, Niels Jákup Csatho, Bea M Joughin, Ian R Bamber, Jonathan L Hjortborg Timm, Lars Wahr, John M 2011 https://orbit.dtu.dk/en/publications/af5705ab-b410-423b-8e59-f4388e500adc eng eng https://orbit.dtu.dk/en/publications/af5705ab-b410-423b-8e59-f4388e500adc info:eu-repo/semantics/restrictedAccess Khan , S A , Kjær , K H , Korsgaard , N J , Csatho , B M , Joughin , I R , Bamber , J L , Hjortborg Timm , L & Wahr , J M 2011 , ' Rapid dynamic thinning on Upernavik Icestream, West Greenland ' , Geophysical Research Abstracts , vol. 13 . conferenceObject 2011 ftdtupubl 2024-07-01T23:52:53Z The main outlet glaciers in Greenland have more than doubled their contribution to global sea level rise over the last decade. Several studies have shown increase in ice discharge from the main outlet glaciers (notably Kangerdlugssuaq (KG) and Helheim glaciers (HG) in Southeast Greenland, and Jakobshavn Isbræ (JI) in West Greenland) as a result of significant accelerations in flow speed. The situation across Greenland continues to evolve. Evidence from GRACE (Velicogna, 2009), GPS (Khan, 2010) and ICESat (Pritchard, 2009) suggest that there is an ongoing northward migration of increasing ice loss. Here, we focus on Upernavik Icesteam, Northwest Greenland, and show that dynamic thinning on short timescales has been dominating the region at least twice between 1985 and 2010. We map changes on Upernavik Icesteram during 2003-2009 using high-resolution ICESat (Ice, Cloud and land Elevation Satellite) laser altimetry data supplemented with altimeter surveys from NASA’s Airborne Topographic Mapper (ATM). To assess thinning prior to 2003, we analyze 1985 aerial photos and derived a 2x2 m grid digital elevation model (DEM). Conference Object Airborne Topographic Mapper Greenland Jakobshavn Jakobshavn isbræ Upernavik Technical University of Denmark: DTU Orbit |
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Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
description |
The main outlet glaciers in Greenland have more than doubled their contribution to global sea level rise over the last decade. Several studies have shown increase in ice discharge from the main outlet glaciers (notably Kangerdlugssuaq (KG) and Helheim glaciers (HG) in Southeast Greenland, and Jakobshavn Isbræ (JI) in West Greenland) as a result of significant accelerations in flow speed. The situation across Greenland continues to evolve. Evidence from GRACE (Velicogna, 2009), GPS (Khan, 2010) and ICESat (Pritchard, 2009) suggest that there is an ongoing northward migration of increasing ice loss. Here, we focus on Upernavik Icesteam, Northwest Greenland, and show that dynamic thinning on short timescales has been dominating the region at least twice between 1985 and 2010. We map changes on Upernavik Icesteram during 2003-2009 using high-resolution ICESat (Ice, Cloud and land Elevation Satellite) laser altimetry data supplemented with altimeter surveys from NASA’s Airborne Topographic Mapper (ATM). To assess thinning prior to 2003, we analyze 1985 aerial photos and derived a 2x2 m grid digital elevation model (DEM). |
format |
Conference Object |
author |
Khan, Shfaqat Abbas Kjær, Kurt H. Korsgaard, Niels Jákup Csatho, Bea M Joughin, Ian R Bamber, Jonathan L Hjortborg Timm, Lars Wahr, John M |
spellingShingle |
Khan, Shfaqat Abbas Kjær, Kurt H. Korsgaard, Niels Jákup Csatho, Bea M Joughin, Ian R Bamber, Jonathan L Hjortborg Timm, Lars Wahr, John M Rapid dynamic thinning on Upernavik Icestream, West Greenland |
author_facet |
Khan, Shfaqat Abbas Kjær, Kurt H. Korsgaard, Niels Jákup Csatho, Bea M Joughin, Ian R Bamber, Jonathan L Hjortborg Timm, Lars Wahr, John M |
author_sort |
Khan, Shfaqat Abbas |
title |
Rapid dynamic thinning on Upernavik Icestream, West Greenland |
title_short |
Rapid dynamic thinning on Upernavik Icestream, West Greenland |
title_full |
Rapid dynamic thinning on Upernavik Icestream, West Greenland |
title_fullStr |
Rapid dynamic thinning on Upernavik Icestream, West Greenland |
title_full_unstemmed |
Rapid dynamic thinning on Upernavik Icestream, West Greenland |
title_sort |
rapid dynamic thinning on upernavik icestream, west greenland |
publishDate |
2011 |
url |
https://orbit.dtu.dk/en/publications/af5705ab-b410-423b-8e59-f4388e500adc |
genre |
Airborne Topographic Mapper Greenland Jakobshavn Jakobshavn isbræ Upernavik |
genre_facet |
Airborne Topographic Mapper Greenland Jakobshavn Jakobshavn isbræ Upernavik |
op_source |
Khan , S A , Kjær , K H , Korsgaard , N J , Csatho , B M , Joughin , I R , Bamber , J L , Hjortborg Timm , L & Wahr , J M 2011 , ' Rapid dynamic thinning on Upernavik Icestream, West Greenland ' , Geophysical Research Abstracts , vol. 13 . |
op_relation |
https://orbit.dtu.dk/en/publications/af5705ab-b410-423b-8e59-f4388e500adc |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1810453338091683840 |