Constraining ice mass loss from Jakobshavn Isbrae (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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fthighwire:oai:open-archive.highwire.org:gji:188/3/994 2023-05-15T13:07:34+02:00 Constraining ice mass loss from Jakobshavn Isbrae (Greenland) using InSAR-measured crustal uplift Liu, Lin Wahr, John Howat, Ian Khan, Shfaqat Abbas Joughin, Ian Furuya, Masato 2012-03-01 00:00:00.0 text/html http://gji.oxfordjournals.org/cgi/content/short/188/3/994 https://doi.org/10.1111/j.1365-246X.2011.05317.x en eng Oxford University Press http://gji.oxfordjournals.org/cgi/content/short/188/3/994 http://dx.doi.org/10.1111/j.1365-246X.2011.05317.x Copyright (C) 2012, Oxford University Press Gravity geodesy and tides TEXT 2012 fthighwire https://doi.org/10.1111/j.1365-246X.2011.05317.x 2016-11-16T19:05:15Z 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. Text Airborne Topographic Mapper glacier Greenland Jakobshavn Jakobshavn isbræ HighWire Press (Stanford University) Greenland Jakobshavn Isbræ ENVELOPE(-49.917,-49.917,69.167,69.167) Geophysical Journal International 188 3 994 1006 |
institution |
Open Polar |
collection |
HighWire Press (Stanford University) |
op_collection_id |
fthighwire |
language |
English |
topic |
Gravity geodesy and tides |
spellingShingle |
Gravity geodesy and tides Liu, Lin Wahr, John Howat, Ian Khan, Shfaqat Abbas Joughin, Ian Furuya, Masato Constraining ice mass loss from Jakobshavn Isbrae (Greenland) using InSAR-measured crustal uplift |
topic_facet |
Gravity geodesy and tides |
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 |
Text |
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 Isbrae (Greenland) using InSAR-measured crustal uplift |
title_short |
Constraining ice mass loss from Jakobshavn Isbrae (Greenland) using InSAR-measured crustal uplift |
title_full |
Constraining ice mass loss from Jakobshavn Isbrae (Greenland) using InSAR-measured crustal uplift |
title_fullStr |
Constraining ice mass loss from Jakobshavn Isbrae (Greenland) using InSAR-measured crustal uplift |
title_full_unstemmed |
Constraining ice mass loss from Jakobshavn Isbrae (Greenland) using InSAR-measured crustal uplift |
title_sort |
constraining ice mass loss from jakobshavn isbrae (greenland) using insar-measured crustal uplift |
publisher |
Oxford University Press |
publishDate |
2012 |
url |
http://gji.oxfordjournals.org/cgi/content/short/188/3/994 https://doi.org/10.1111/j.1365-246X.2011.05317.x |
long_lat |
ENVELOPE(-49.917,-49.917,69.167,69.167) |
geographic |
Greenland Jakobshavn Isbræ |
geographic_facet |
Greenland Jakobshavn Isbræ |
genre |
Airborne Topographic Mapper glacier Greenland Jakobshavn Jakobshavn isbræ |
genre_facet |
Airborne Topographic Mapper glacier Greenland Jakobshavn Jakobshavn isbræ |
op_relation |
http://gji.oxfordjournals.org/cgi/content/short/188/3/994 http://dx.doi.org/10.1111/j.1365-246X.2011.05317.x |
op_rights |
Copyright (C) 2012, Oxford University Press |
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 |
_version_ |
1766059673951141888 |