Timing and origin of recent regional ice-mass loss in Greenland
Within the last decade, the Greenland ice sheet (GrIS) and its surroundings have experienced record high surface temperatures (Mote, 2007; Box et al., 2010), ice sheet melt extent (Fettweis et al., 2011) and record-low summer sea-ice extent (Nghiem et al., 2007). Using three independent data sets, w...
Published in: | Earth and Planetary Science Letters |
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2012
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Online Access: | https://hdl.handle.net/1983/6ba6715d-eea6-4634-a532-8efd1c32b319 https://research-information.bris.ac.uk/en/publications/6ba6715d-eea6-4634-a532-8efd1c32b319 https://doi.org/10.1016/j.epsl.2012.03.033 |
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ftubristolcris:oai:research-information.bris.ac.uk:publications/6ba6715d-eea6-4634-a532-8efd1c32b319 2024-02-04T10:00:49+01:00 Timing and origin of recent regional ice-mass loss in Greenland Sasgen, Ingo van den Broeke, Michiel Bamber, Jonathan L. Rignot, Eric Sorensen, Louise Sandberg Wouters, Bert Martinec, Zdenek Velicogna, Isabella Simonsen, Sebastian B. 2012-06-01 https://hdl.handle.net/1983/6ba6715d-eea6-4634-a532-8efd1c32b319 https://research-information.bris.ac.uk/en/publications/6ba6715d-eea6-4634-a532-8efd1c32b319 https://doi.org/10.1016/j.epsl.2012.03.033 eng eng info:eu-repo/semantics/restrictedAccess Sasgen , I , van den Broeke , M , Bamber , J L , Rignot , E , Sorensen , L S , Wouters , B , Martinec , Z , Velicogna , I & Simonsen , S B 2012 , ' Timing and origin of recent regional ice-mass loss in Greenland ' , Earth and Planetary Science Letters , vol. 333 , pp. 293-303 . https://doi.org/10.1016/j.epsl.2012.03.033 article 2012 ftubristolcris https://doi.org/10.1016/j.epsl.2012.03.033 2024-01-11T23:37:36Z Within the last decade, the Greenland ice sheet (GrIS) and its surroundings have experienced record high surface temperatures (Mote, 2007; Box et al., 2010), ice sheet melt extent (Fettweis et al., 2011) and record-low summer sea-ice extent (Nghiem et al., 2007). Using three independent data sets, we derive, for the first time, consistent ice-mass trends and temporal variations within seven major drainage basins from gravity fields from the Gravity Recovery and Climate Experiment (GRACE; Tapley et al., 2004), surface-ice velocities from Inteferometric Synthetic Aperture Radar (InSAR; Rignot and Kanagaratnam, 2006) together with output of the regional atmospheric climate modelling (RACMO2/GR; Ettema et al., 2009), and surface-elevation changes from the Ice, cloud and land elevation satellite (ICESat; Sorensen et al., 2011). We show that changing ice discharge (D), surface melting and subsequent run-off (M/R) and precipitation (P) all contribute, in a complex and regionally variable interplay, to the increasingly negative mass balance of the GrIS observed within the last decade. Interannual variability in P along the northwest and west coasts of the GrIS largely explains the apparent regional mass loss increase during 2002-2010, and obscures increasing M/R and D since the 1990s. In winter 2002/2003 and 2008/2009, accumulation anomalies in the east and southeast temporarily outweighed the losses by M/R and D that prevailed during 2003-2008, and after summer 2010. Overall, for all basins of the GrIS, the decadal variability of anomalies in P, M/R and D between 1958 and 2010 (w.r.t. 1961-1990) was significantly exceeded by the regional trends observed during the GRACE period (2002-2011). (C) 2012 Elsevier B.V. All rights reserved. Article in Journal/Newspaper Greenland Ice Sheet Sea ice University of Bristol: Bristol Research Greenland Earth and Planetary Science Letters 333-334 293 303 |
institution |
Open Polar |
collection |
University of Bristol: Bristol Research |
op_collection_id |
ftubristolcris |
language |
English |
description |
Within the last decade, the Greenland ice sheet (GrIS) and its surroundings have experienced record high surface temperatures (Mote, 2007; Box et al., 2010), ice sheet melt extent (Fettweis et al., 2011) and record-low summer sea-ice extent (Nghiem et al., 2007). Using three independent data sets, we derive, for the first time, consistent ice-mass trends and temporal variations within seven major drainage basins from gravity fields from the Gravity Recovery and Climate Experiment (GRACE; Tapley et al., 2004), surface-ice velocities from Inteferometric Synthetic Aperture Radar (InSAR; Rignot and Kanagaratnam, 2006) together with output of the regional atmospheric climate modelling (RACMO2/GR; Ettema et al., 2009), and surface-elevation changes from the Ice, cloud and land elevation satellite (ICESat; Sorensen et al., 2011). We show that changing ice discharge (D), surface melting and subsequent run-off (M/R) and precipitation (P) all contribute, in a complex and regionally variable interplay, to the increasingly negative mass balance of the GrIS observed within the last decade. Interannual variability in P along the northwest and west coasts of the GrIS largely explains the apparent regional mass loss increase during 2002-2010, and obscures increasing M/R and D since the 1990s. In winter 2002/2003 and 2008/2009, accumulation anomalies in the east and southeast temporarily outweighed the losses by M/R and D that prevailed during 2003-2008, and after summer 2010. Overall, for all basins of the GrIS, the decadal variability of anomalies in P, M/R and D between 1958 and 2010 (w.r.t. 1961-1990) was significantly exceeded by the regional trends observed during the GRACE period (2002-2011). (C) 2012 Elsevier B.V. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Sasgen, Ingo van den Broeke, Michiel Bamber, Jonathan L. Rignot, Eric Sorensen, Louise Sandberg Wouters, Bert Martinec, Zdenek Velicogna, Isabella Simonsen, Sebastian B. |
spellingShingle |
Sasgen, Ingo van den Broeke, Michiel Bamber, Jonathan L. Rignot, Eric Sorensen, Louise Sandberg Wouters, Bert Martinec, Zdenek Velicogna, Isabella Simonsen, Sebastian B. Timing and origin of recent regional ice-mass loss in Greenland |
author_facet |
Sasgen, Ingo van den Broeke, Michiel Bamber, Jonathan L. Rignot, Eric Sorensen, Louise Sandberg Wouters, Bert Martinec, Zdenek Velicogna, Isabella Simonsen, Sebastian B. |
author_sort |
Sasgen, Ingo |
title |
Timing and origin of recent regional ice-mass loss in Greenland |
title_short |
Timing and origin of recent regional ice-mass loss in Greenland |
title_full |
Timing and origin of recent regional ice-mass loss in Greenland |
title_fullStr |
Timing and origin of recent regional ice-mass loss in Greenland |
title_full_unstemmed |
Timing and origin of recent regional ice-mass loss in Greenland |
title_sort |
timing and origin of recent regional ice-mass loss in greenland |
publishDate |
2012 |
url |
https://hdl.handle.net/1983/6ba6715d-eea6-4634-a532-8efd1c32b319 https://research-information.bris.ac.uk/en/publications/6ba6715d-eea6-4634-a532-8efd1c32b319 https://doi.org/10.1016/j.epsl.2012.03.033 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet Sea ice |
genre_facet |
Greenland Ice Sheet Sea ice |
op_source |
Sasgen , I , van den Broeke , M , Bamber , J L , Rignot , E , Sorensen , L S , Wouters , B , Martinec , Z , Velicogna , I & Simonsen , S B 2012 , ' Timing and origin of recent regional ice-mass loss in Greenland ' , Earth and Planetary Science Letters , vol. 333 , pp. 293-303 . https://doi.org/10.1016/j.epsl.2012.03.033 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.epsl.2012.03.033 |
container_title |
Earth and Planetary Science Letters |
container_volume |
333-334 |
container_start_page |
293 |
op_container_end_page |
303 |
_version_ |
1789966292211466240 |