Spatial pattern of mass loss processes across the Greenland Ice Sheet from the Little Ice Age to 2010
The Greenland Ice Sheet loses mass through surface meltwater runoff and discharge from marine terminating outlet glaciers. The spatial variability and magnitude of these processes have been studied and described in detail for the past decades. Here, we combine the mass loss between the LIA to 2010 w...
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ftdtupubl:oai:pure.atira.dk:publications/1e321fb0-dd0f-4bae-9da8-bc548af1c339 2023-05-15T13:07:37+02:00 Spatial pattern of mass loss processes across the Greenland Ice Sheet from the Little Ice Age to 2010 Kjaer, K. H. Korsgaard, N. J. Kjeldsen, K. K. Bjork, A. A. Khan, Shfaqat Abbas Funder, S. Nuth, C. Larsen, N. K. Vinther, B. Andresen, C.S. Long, A. J. Woodroffe, S. Hansen, E. S. Odgaard, B. V. Olsen, J. Bamber, J. L. van den Broeke, M. R. Box, J. E. Willerslev, E. 2013 application/pdf https://orbit.dtu.dk/en/publications/1e321fb0-dd0f-4bae-9da8-bc548af1c339 https://backend.orbit.dtu.dk/ws/files/84760456/prod11389870829612.AGU2.pdf eng eng info:eu-repo/semantics/openAccess Kjaer , K H , Korsgaard , N J , Kjeldsen , K K , Bjork , A A , Khan , S A , Funder , S , Nuth , C , Larsen , N K , Vinther , B , Andresen , C S , Long , A J , Woodroffe , S , Hansen , E S , Odgaard , B V , Olsen , J , Bamber , J L , van den Broeke , M R , Box , J E & Willerslev , E 2013 , ' Spatial pattern of mass loss processes across the Greenland Ice Sheet from the Little Ice Age to 2010 ' , AGU Fall Meeting 2013 , San Francisco , United States , 09/12/2013 - 13/12/2013 . /dk/atira/pure/sustainabledevelopmentgoals/life_below_water SDG 14 - Life Below Water conferenceObject 2013 ftdtupubl 2022-08-14T08:17:36Z The Greenland Ice Sheet loses mass through surface meltwater runoff and discharge from marine terminating outlet glaciers. The spatial variability and magnitude of these processes have been studied and described in detail for the past decades. Here, we combine the mass loss between the LIA to 2010 with a SMB model extending back to ~1900 in order to investigate the spatial distribution of mass loss processes. We use high quality aerial stereo photogrammetric imagery recorded between 1978 and 1987 to map morphological features such as trim lines and end moraines marking the maximum ice extent of the LIA, which enables us to obtain vertical point-based differences associated with former ice extent. These point measurements are combined with contemporary ice surface differences derived using NASA's Airborne Topographic Mapper (ATM) from 2003-2010, NASA's Ice, Cloud, and land Elevation Satellite (ICESat) from 2003-2009, NASA's Land, Vegetation, and Ice Sensor (LVIS) from 2010, and ASTER (Silcast AST14DMO) co-registered to ICESat, to estimate mass loss throughout the 20th and early 21st Century. The mass balance estimates of the GrIS since retreat from maximum LIA is combined with a SMB model for the period for three intervals, LIAmax (~1900) - 1978/87, 1978/87 - 2003, and 2003 - 2010. Across the GrIS the total mass loss if found to be spatially- and temporally variable. However, when assessing the mass loss due to SMB and mass loss due to dynamic ice loss, we find that that the ratios between these components are variable between the different sectors of the GrIS, e.g. in the southeast sector of the GrIS we find substantial mass loss, possibly driven by high precipitation rates but also the presence of a large number of marine terminating glaciers. Furthermore many areas currently undergoing changes correspond to those that experienced considerable thinning throughout the 20th century. Consequently, comparing the 20th century thinning pattern to that of the last decade, and assuming a similar warming pattern, we ... Conference Object Airborne Topographic Mapper Greenland Ice Sheet Technical University of Denmark: DTU Orbit Greenland Vertical Point ENVELOPE(-131.621,-131.621,52.900,52.900) |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water SDG 14 - Life Below Water |
spellingShingle |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water SDG 14 - Life Below Water Kjaer, K. H. Korsgaard, N. J. Kjeldsen, K. K. Bjork, A. A. Khan, Shfaqat Abbas Funder, S. Nuth, C. Larsen, N. K. Vinther, B. Andresen, C.S. Long, A. J. Woodroffe, S. Hansen, E. S. Odgaard, B. V. Olsen, J. Bamber, J. L. van den Broeke, M. R. Box, J. E. Willerslev, E. Spatial pattern of mass loss processes across the Greenland Ice Sheet from the Little Ice Age to 2010 |
topic_facet |
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water SDG 14 - Life Below Water |
description |
The Greenland Ice Sheet loses mass through surface meltwater runoff and discharge from marine terminating outlet glaciers. The spatial variability and magnitude of these processes have been studied and described in detail for the past decades. Here, we combine the mass loss between the LIA to 2010 with a SMB model extending back to ~1900 in order to investigate the spatial distribution of mass loss processes. We use high quality aerial stereo photogrammetric imagery recorded between 1978 and 1987 to map morphological features such as trim lines and end moraines marking the maximum ice extent of the LIA, which enables us to obtain vertical point-based differences associated with former ice extent. These point measurements are combined with contemporary ice surface differences derived using NASA's Airborne Topographic Mapper (ATM) from 2003-2010, NASA's Ice, Cloud, and land Elevation Satellite (ICESat) from 2003-2009, NASA's Land, Vegetation, and Ice Sensor (LVIS) from 2010, and ASTER (Silcast AST14DMO) co-registered to ICESat, to estimate mass loss throughout the 20th and early 21st Century. The mass balance estimates of the GrIS since retreat from maximum LIA is combined with a SMB model for the period for three intervals, LIAmax (~1900) - 1978/87, 1978/87 - 2003, and 2003 - 2010. Across the GrIS the total mass loss if found to be spatially- and temporally variable. However, when assessing the mass loss due to SMB and mass loss due to dynamic ice loss, we find that that the ratios between these components are variable between the different sectors of the GrIS, e.g. in the southeast sector of the GrIS we find substantial mass loss, possibly driven by high precipitation rates but also the presence of a large number of marine terminating glaciers. Furthermore many areas currently undergoing changes correspond to those that experienced considerable thinning throughout the 20th century. Consequently, comparing the 20th century thinning pattern to that of the last decade, and assuming a similar warming pattern, we ... |
format |
Conference Object |
author |
Kjaer, K. H. Korsgaard, N. J. Kjeldsen, K. K. Bjork, A. A. Khan, Shfaqat Abbas Funder, S. Nuth, C. Larsen, N. K. Vinther, B. Andresen, C.S. Long, A. J. Woodroffe, S. Hansen, E. S. Odgaard, B. V. Olsen, J. Bamber, J. L. van den Broeke, M. R. Box, J. E. Willerslev, E. |
author_facet |
Kjaer, K. H. Korsgaard, N. J. Kjeldsen, K. K. Bjork, A. A. Khan, Shfaqat Abbas Funder, S. Nuth, C. Larsen, N. K. Vinther, B. Andresen, C.S. Long, A. J. Woodroffe, S. Hansen, E. S. Odgaard, B. V. Olsen, J. Bamber, J. L. van den Broeke, M. R. Box, J. E. Willerslev, E. |
author_sort |
Kjaer, K. H. |
title |
Spatial pattern of mass loss processes across the Greenland Ice Sheet from the Little Ice Age to 2010 |
title_short |
Spatial pattern of mass loss processes across the Greenland Ice Sheet from the Little Ice Age to 2010 |
title_full |
Spatial pattern of mass loss processes across the Greenland Ice Sheet from the Little Ice Age to 2010 |
title_fullStr |
Spatial pattern of mass loss processes across the Greenland Ice Sheet from the Little Ice Age to 2010 |
title_full_unstemmed |
Spatial pattern of mass loss processes across the Greenland Ice Sheet from the Little Ice Age to 2010 |
title_sort |
spatial pattern of mass loss processes across the greenland ice sheet from the little ice age to 2010 |
publishDate |
2013 |
url |
https://orbit.dtu.dk/en/publications/1e321fb0-dd0f-4bae-9da8-bc548af1c339 https://backend.orbit.dtu.dk/ws/files/84760456/prod11389870829612.AGU2.pdf |
long_lat |
ENVELOPE(-131.621,-131.621,52.900,52.900) |
geographic |
Greenland Vertical Point |
geographic_facet |
Greenland Vertical Point |
genre |
Airborne Topographic Mapper Greenland Ice Sheet |
genre_facet |
Airborne Topographic Mapper Greenland Ice Sheet |
op_source |
Kjaer , K H , Korsgaard , N J , Kjeldsen , K K , Bjork , A A , Khan , S A , Funder , S , Nuth , C , Larsen , N K , Vinther , B , Andresen , C S , Long , A J , Woodroffe , S , Hansen , E S , Odgaard , B V , Olsen , J , Bamber , J L , van den Broeke , M R , Box , J E & Willerslev , E 2013 , ' Spatial pattern of mass loss processes across the Greenland Ice Sheet from the Little Ice Age to 2010 ' , AGU Fall Meeting 2013 , San Francisco , United States , 09/12/2013 - 13/12/2013 . |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766061350729023488 |