Marginal thinning in Northwest Greenland during 2002-2011
Many glaciers along the southeast and northwest coast of Greenland have accelerated, increasing the Greenland ice sheet's (GrIS) contribution to global sea-level rise. Here, we map elevation changes in northwest Greenland during 2003-2009 using high-resolution Ice, Cloud and land Elevation Sate...
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ftdtupubl:oai:pure.atira.dk:publications/ad020591-7112-46fe-9855-8ea360ec6ab8 2024-09-15T17:35:21+00:00 Marginal thinning in Northwest Greenland during 2002-2011 Khan, Shfaqat Abbas Kjær, K. H. Wahr, J. M. Bevis, M. Korsgaard, N. Bjørk, A. A. Kjeldsen, K. K. Timm, L. M. Dam, T. v. 2012 application/pdf https://orbit.dtu.dk/en/publications/ad020591-7112-46fe-9855-8ea360ec6ab8 https://backend.orbit.dtu.dk/ws/files/51156185/17.pdf eng eng https://orbit.dtu.dk/en/publications/ad020591-7112-46fe-9855-8ea360ec6ab8 info:eu-repo/semantics/openAccess Khan , S A , Kjær , K H , Wahr , J M , Bevis , M , Korsgaard , N , Bjørk , A A , Kjeldsen , K K , Timm , L M & Dam , T V 2012 , ' Marginal thinning in Northwest Greenland during 2002-2011 ' , Geophysical Research Abstracts , vol. 14 , pp. EGU2012-1852 . /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action conferenceObject 2012 ftdtupubl 2024-07-01T23:52:53Z Many glaciers along the southeast and northwest coast of Greenland have accelerated, increasing the Greenland ice sheet's (GrIS) contribution to global sea-level rise. Here, we map elevation changes in northwest Greenland during 2003-2009 using high-resolution Ice, Cloud and land Elevation Satellite (ICESat) laser altimeter data (Zwally, 2010) supplemented with altimeter surveys from NASA's Airborne Topographic Mapper (ATM) during 2002-2011 (Krabill, 2011). We use the measurements of elevation change to estimate catchment-wide ice volume loss (convert is to mass loss) and compare with independent measurements from GPS and the Gravity Recovery and Climate Experiment (GRACE) satellite gravity mission, launched in March, 2002. The GRACE results provide a direct measure of mass loss averaged over the entire northwest sector, while the GPS data are used to monitor crustal uplift caused by ice mass loss close to the sites. GPS data from a long term site at Thule Airbase show accelerated uplift starting in 2005 and a minor deceleration in 2009-2010. The deceleration is more dominant at GPS stations deployed in 2007 in northwest Greenland as part of the Greenland GPS Network (GNET). Independently, all three methods suggest increased ice loss in northwest Greenland starting in 2005 and a slowdown in 2009-2010. Conference Object Airborne Topographic Mapper Greenland Thule Technical University of Denmark: DTU Orbit |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
spellingShingle |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action Khan, Shfaqat Abbas Kjær, K. H. Wahr, J. M. Bevis, M. Korsgaard, N. Bjørk, A. A. Kjeldsen, K. K. Timm, L. M. Dam, T. v. Marginal thinning in Northwest Greenland during 2002-2011 |
topic_facet |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
description |
Many glaciers along the southeast and northwest coast of Greenland have accelerated, increasing the Greenland ice sheet's (GrIS) contribution to global sea-level rise. Here, we map elevation changes in northwest Greenland during 2003-2009 using high-resolution Ice, Cloud and land Elevation Satellite (ICESat) laser altimeter data (Zwally, 2010) supplemented with altimeter surveys from NASA's Airborne Topographic Mapper (ATM) during 2002-2011 (Krabill, 2011). We use the measurements of elevation change to estimate catchment-wide ice volume loss (convert is to mass loss) and compare with independent measurements from GPS and the Gravity Recovery and Climate Experiment (GRACE) satellite gravity mission, launched in March, 2002. The GRACE results provide a direct measure of mass loss averaged over the entire northwest sector, while the GPS data are used to monitor crustal uplift caused by ice mass loss close to the sites. GPS data from a long term site at Thule Airbase show accelerated uplift starting in 2005 and a minor deceleration in 2009-2010. The deceleration is more dominant at GPS stations deployed in 2007 in northwest Greenland as part of the Greenland GPS Network (GNET). Independently, all three methods suggest increased ice loss in northwest Greenland starting in 2005 and a slowdown in 2009-2010. |
format |
Conference Object |
author |
Khan, Shfaqat Abbas Kjær, K. H. Wahr, J. M. Bevis, M. Korsgaard, N. Bjørk, A. A. Kjeldsen, K. K. Timm, L. M. Dam, T. v. |
author_facet |
Khan, Shfaqat Abbas Kjær, K. H. Wahr, J. M. Bevis, M. Korsgaard, N. Bjørk, A. A. Kjeldsen, K. K. Timm, L. M. Dam, T. v. |
author_sort |
Khan, Shfaqat Abbas |
title |
Marginal thinning in Northwest Greenland during 2002-2011 |
title_short |
Marginal thinning in Northwest Greenland during 2002-2011 |
title_full |
Marginal thinning in Northwest Greenland during 2002-2011 |
title_fullStr |
Marginal thinning in Northwest Greenland during 2002-2011 |
title_full_unstemmed |
Marginal thinning in Northwest Greenland during 2002-2011 |
title_sort |
marginal thinning in northwest greenland during 2002-2011 |
publishDate |
2012 |
url |
https://orbit.dtu.dk/en/publications/ad020591-7112-46fe-9855-8ea360ec6ab8 https://backend.orbit.dtu.dk/ws/files/51156185/17.pdf |
genre |
Airborne Topographic Mapper Greenland Thule |
genre_facet |
Airborne Topographic Mapper Greenland Thule |
op_source |
Khan , S A , Kjær , K H , Wahr , J M , Bevis , M , Korsgaard , N , Bjørk , A A , Kjeldsen , K K , Timm , L M & Dam , T V 2012 , ' Marginal thinning in Northwest Greenland during 2002-2011 ' , Geophysical Research Abstracts , vol. 14 , pp. EGU2012-1852 . |
op_relation |
https://orbit.dtu.dk/en/publications/ad020591-7112-46fe-9855-8ea360ec6ab8 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1810453475039903744 |