Vertical and horizontal surface displacements near Jakobshavn Isbræ driven by melt-induced and dynamic ice loss
We analyze Global Positioning System (GPS) time series of relative vertical and horizontal surface displacements from 2006 to 2012 at four GPS sites located between ∼5 and ∼150 km from the front of Jakobshavn Isbræ (JI) in west Greenland. Horizontal displacements during 2006–2010 at KAGA, ILUL, and...
Published in: | Journal of Geophysical Research: Solid Earth |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2013
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Online Access: | https://orbit.dtu.dk/en/publications/be84aeac-1708-45b2-9474-cd5180267bfe https://doi.org/10.1002/jgrb.50145 |
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ftdtupubl:oai:pure.atira.dk:publications/be84aeac-1708-45b2-9474-cd5180267bfe 2024-09-15T17:35:21+00:00 Vertical and horizontal surface displacements near Jakobshavn Isbræ driven by melt-induced and dynamic ice loss Nielsen, Karina Khan, Shfaqat Abbas Spada, G. Wahr, J. M. Bevis, M. G. Liu, L. van Dam, T. M. 2013 https://orbit.dtu.dk/en/publications/be84aeac-1708-45b2-9474-cd5180267bfe https://doi.org/10.1002/jgrb.50145 eng eng https://orbit.dtu.dk/en/publications/be84aeac-1708-45b2-9474-cd5180267bfe info:eu-repo/semantics/closedAccess Nielsen , K , Khan , S A , Spada , G , Wahr , J M , Bevis , M G , Liu , L & van Dam , T M 2013 , ' Vertical and horizontal surface displacements near Jakobshavn Isbræ driven by melt-induced and dynamic ice loss ' , Journal of Geophysical Research: Atmospheres , vol. 118 , no. 4 , pp. 1837-1844 . https://doi.org/10.1002/jgrb.50145 article 2013 ftdtupubl https://doi.org/10.1002/jgrb.50145 2024-07-01T23:52:53Z We analyze Global Positioning System (GPS) time series of relative vertical and horizontal surface displacements from 2006 to 2012 at four GPS sites located between ∼5 and ∼150 km from the front of Jakobshavn Isbræ (JI) in west Greenland. Horizontal displacements during 2006–2010 at KAGA, ILUL, and QEQE, relative to the site AASI, are directed toward north-west, suggesting that the main mass loss signal is located near the frontal portion of JI. The directions of the observed displacements are supported by modeled displacements, derived from NASA's Airborne Topographic Mapper (ATM) surveys of surface elevations from 2006, 2009, and 2010. However, horizontal displacements during 2010–2012 at KAGA and ILUL are directed more towards the west suggesting a change in the spatial distribution of the ice mass loss. In addition, we observe an increase in the uplift rate during 2010–2012 as compared to 2006–2010. The sudden change in vertical and horizontal displacements is due to enhanced melt-induced ice loss in 2010 and 2012. Article in Journal/Newspaper Airborne Topographic Mapper Greenland Jakobshavn Jakobshavn isbræ Technical University of Denmark: DTU Orbit Journal of Geophysical Research: Solid Earth 118 4 1837 1844 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
description |
We analyze Global Positioning System (GPS) time series of relative vertical and horizontal surface displacements from 2006 to 2012 at four GPS sites located between ∼5 and ∼150 km from the front of Jakobshavn Isbræ (JI) in west Greenland. Horizontal displacements during 2006–2010 at KAGA, ILUL, and QEQE, relative to the site AASI, are directed toward north-west, suggesting that the main mass loss signal is located near the frontal portion of JI. The directions of the observed displacements are supported by modeled displacements, derived from NASA's Airborne Topographic Mapper (ATM) surveys of surface elevations from 2006, 2009, and 2010. However, horizontal displacements during 2010–2012 at KAGA and ILUL are directed more towards the west suggesting a change in the spatial distribution of the ice mass loss. In addition, we observe an increase in the uplift rate during 2010–2012 as compared to 2006–2010. The sudden change in vertical and horizontal displacements is due to enhanced melt-induced ice loss in 2010 and 2012. |
format |
Article in Journal/Newspaper |
author |
Nielsen, Karina Khan, Shfaqat Abbas Spada, G. Wahr, J. M. Bevis, M. G. Liu, L. van Dam, T. M. |
spellingShingle |
Nielsen, Karina Khan, Shfaqat Abbas Spada, G. Wahr, J. M. Bevis, M. G. Liu, L. van Dam, T. M. Vertical and horizontal surface displacements near Jakobshavn Isbræ driven by melt-induced and dynamic ice loss |
author_facet |
Nielsen, Karina Khan, Shfaqat Abbas Spada, G. Wahr, J. M. Bevis, M. G. Liu, L. van Dam, T. M. |
author_sort |
Nielsen, Karina |
title |
Vertical and horizontal surface displacements near Jakobshavn Isbræ driven by melt-induced and dynamic ice loss |
title_short |
Vertical and horizontal surface displacements near Jakobshavn Isbræ driven by melt-induced and dynamic ice loss |
title_full |
Vertical and horizontal surface displacements near Jakobshavn Isbræ driven by melt-induced and dynamic ice loss |
title_fullStr |
Vertical and horizontal surface displacements near Jakobshavn Isbræ driven by melt-induced and dynamic ice loss |
title_full_unstemmed |
Vertical and horizontal surface displacements near Jakobshavn Isbræ driven by melt-induced and dynamic ice loss |
title_sort |
vertical and horizontal surface displacements near jakobshavn isbræ driven by melt-induced and dynamic ice loss |
publishDate |
2013 |
url |
https://orbit.dtu.dk/en/publications/be84aeac-1708-45b2-9474-cd5180267bfe https://doi.org/10.1002/jgrb.50145 |
genre |
Airborne Topographic Mapper Greenland Jakobshavn Jakobshavn isbræ |
genre_facet |
Airborne Topographic Mapper Greenland Jakobshavn Jakobshavn isbræ |
op_source |
Nielsen , K , Khan , S A , Spada , G , Wahr , J M , Bevis , M G , Liu , L & van Dam , T M 2013 , ' Vertical and horizontal surface displacements near Jakobshavn Isbræ driven by melt-induced and dynamic ice loss ' , Journal of Geophysical Research: Atmospheres , vol. 118 , no. 4 , pp. 1837-1844 . https://doi.org/10.1002/jgrb.50145 |
op_relation |
https://orbit.dtu.dk/en/publications/be84aeac-1708-45b2-9474-cd5180267bfe |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1002/jgrb.50145 |
container_title |
Journal of Geophysical Research: Solid Earth |
container_volume |
118 |
container_issue |
4 |
container_start_page |
1837 |
op_container_end_page |
1844 |
_version_ |
1810453318669959168 |