Constraining ice mass loss from Jakobshavn Isbræ (Greenland) using InSAR-measured crustal uplift
Jakobshavn Isbræ in west Greenland has been undergoing dramatic thinning since 1997. Applying the interferometric synthetic aperture radar (InSAR) technique to Radarsat-1 SAR data, we measure crustal uplift near Jakobshavn Isbræ caused by recent ice mass loss. The crustal uplift is predominantly at...
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2012
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Online Access: | https://orbit.dtu.dk/en/publications/8bc022a6-4702-4180-a4a8-452240c91d5e https://doi.org/10.1111/j.1365-246X.2011.05317.x |
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ftdtupubl:oai:pure.atira.dk:publications/8bc022a6-4702-4180-a4a8-452240c91d5e 2023-12-17T10:17:48+01:00 Constraining ice mass loss from Jakobshavn Isbræ (Greenland) using InSAR-measured crustal uplift Liu, Lin Wahr, John Howat, Ian Khan, Shfaqat Abbas Joughin, Ian Furuya, Masato 2012 https://orbit.dtu.dk/en/publications/8bc022a6-4702-4180-a4a8-452240c91d5e https://doi.org/10.1111/j.1365-246X.2011.05317.x eng eng info:eu-repo/semantics/closedAccess Liu , L , Wahr , J , Howat , I , Khan , S A , Joughin , I & Furuya , M 2012 , ' Constraining ice mass loss from Jakobshavn Isbræ (Greenland) using InSAR-measured crustal uplift ' , Geophysical Journal International , vol. 188 , no. 3 , pp. 994-1006 . https://doi.org/10.1111/j.1365-246X.2011.05317.x Arctic region Space geodetic surveys Kinematics of crustal and mantle deformation Radar interferometry Glaciology /dk/atira/pure/sustainabledevelopmentgoals/climate_action SDG 13 - Climate Action article 2012 ftdtupubl https://doi.org/10.1111/j.1365-246X.2011.05317.x 2023-11-22T23:56:56Z Jakobshavn Isbræ in west Greenland has been undergoing dramatic thinning since 1997. Applying the interferometric synthetic aperture radar (InSAR) technique to Radarsat-1 SAR data, we measure crustal uplift near Jakobshavn Isbræ caused by recent ice mass loss. The crustal uplift is predominantly at long spatial wavelengths (larger than 10 km), and thus is difficult to separate from InSAR orbit errors. We reduce the effects of orbit errors by removing long-wavelength deformation signals using conventional InSAR baseline fitting methods. We find good agreement between the remaining short-scale InSAR-estimated deformation rates during 2004–2008 and the corresponding short-scale components of a deformation model that is based on changes in ice elevation measured by NASA’s Airborne Topographic Mapper (ATM). We are also able to use the InSAR-measured deformation to invert for the spatial pattern of ice thinning. Overall, our results suggest that despite the inherent difficulties of working with a signal that has significant large-scale components, InSAR-measured crustal deformation can be used to study the ice mass loss of a rapidly thinning glacier and its surrounding catchment, providing both a constraint on any existing model of ice mass loss and a data source that can be used to invert for ice mass loss. These new applications of InSAR can help to better understand a glacier’s rapid response to a warming climate. Article in Journal/Newspaper Airborne Topographic Mapper Arctic glacier Greenland Jakobshavn Jakobshavn isbræ Technical University of Denmark: DTU Orbit Arctic Greenland Jakobshavn Isbræ ENVELOPE(-49.917,-49.917,69.167,69.167) Geophysical Journal International 188 3 994 1006 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Arctic region Space geodetic surveys Kinematics of crustal and mantle deformation Radar interferometry Glaciology /dk/atira/pure/sustainabledevelopmentgoals/climate_action SDG 13 - Climate Action |
spellingShingle |
Arctic region Space geodetic surveys Kinematics of crustal and mantle deformation Radar interferometry Glaciology /dk/atira/pure/sustainabledevelopmentgoals/climate_action SDG 13 - Climate Action Liu, Lin Wahr, John Howat, Ian Khan, Shfaqat Abbas Joughin, Ian Furuya, Masato Constraining ice mass loss from Jakobshavn Isbræ (Greenland) using InSAR-measured crustal uplift |
topic_facet |
Arctic region Space geodetic surveys Kinematics of crustal and mantle deformation Radar interferometry Glaciology /dk/atira/pure/sustainabledevelopmentgoals/climate_action SDG 13 - Climate Action |
description |
Jakobshavn Isbræ in west Greenland has been undergoing dramatic thinning since 1997. Applying the interferometric synthetic aperture radar (InSAR) technique to Radarsat-1 SAR data, we measure crustal uplift near Jakobshavn Isbræ caused by recent ice mass loss. The crustal uplift is predominantly at long spatial wavelengths (larger than 10 km), and thus is difficult to separate from InSAR orbit errors. We reduce the effects of orbit errors by removing long-wavelength deformation signals using conventional InSAR baseline fitting methods. We find good agreement between the remaining short-scale InSAR-estimated deformation rates during 2004–2008 and the corresponding short-scale components of a deformation model that is based on changes in ice elevation measured by NASA’s Airborne Topographic Mapper (ATM). We are also able to use the InSAR-measured deformation to invert for the spatial pattern of ice thinning. Overall, our results suggest that despite the inherent difficulties of working with a signal that has significant large-scale components, InSAR-measured crustal deformation can be used to study the ice mass loss of a rapidly thinning glacier and its surrounding catchment, providing both a constraint on any existing model of ice mass loss and a data source that can be used to invert for ice mass loss. These new applications of InSAR can help to better understand a glacier’s rapid response to a warming climate. |
format |
Article in Journal/Newspaper |
author |
Liu, Lin Wahr, John Howat, Ian Khan, Shfaqat Abbas Joughin, Ian Furuya, Masato |
author_facet |
Liu, Lin Wahr, John Howat, Ian Khan, Shfaqat Abbas Joughin, Ian Furuya, Masato |
author_sort |
Liu, Lin |
title |
Constraining ice mass loss from Jakobshavn Isbræ (Greenland) using InSAR-measured crustal uplift |
title_short |
Constraining ice mass loss from Jakobshavn Isbræ (Greenland) using InSAR-measured crustal uplift |
title_full |
Constraining ice mass loss from Jakobshavn Isbræ (Greenland) using InSAR-measured crustal uplift |
title_fullStr |
Constraining ice mass loss from Jakobshavn Isbræ (Greenland) using InSAR-measured crustal uplift |
title_full_unstemmed |
Constraining ice mass loss from Jakobshavn Isbræ (Greenland) using InSAR-measured crustal uplift |
title_sort |
constraining ice mass loss from jakobshavn isbræ (greenland) using insar-measured crustal uplift |
publishDate |
2012 |
url |
https://orbit.dtu.dk/en/publications/8bc022a6-4702-4180-a4a8-452240c91d5e https://doi.org/10.1111/j.1365-246X.2011.05317.x |
long_lat |
ENVELOPE(-49.917,-49.917,69.167,69.167) |
geographic |
Arctic Greenland Jakobshavn Isbræ |
geographic_facet |
Arctic Greenland Jakobshavn Isbræ |
genre |
Airborne Topographic Mapper Arctic glacier Greenland Jakobshavn Jakobshavn isbræ |
genre_facet |
Airborne Topographic Mapper Arctic glacier Greenland Jakobshavn Jakobshavn isbræ |
op_source |
Liu , L , Wahr , J , Howat , I , Khan , S A , Joughin , I & Furuya , M 2012 , ' Constraining ice mass loss from Jakobshavn Isbræ (Greenland) using InSAR-measured crustal uplift ' , Geophysical Journal International , vol. 188 , no. 3 , pp. 994-1006 . https://doi.org/10.1111/j.1365-246X.2011.05317.x |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1111/j.1365-246X.2011.05317.x |
container_title |
Geophysical Journal International |
container_volume |
188 |
container_issue |
3 |
container_start_page |
994 |
op_container_end_page |
1006 |
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1785591032557076480 |