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...
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ftcdlib:qt09x7r3hj 2023-05-15T16:28:31+02:00 Timing and origin of recent regional ice-mass loss in Greenland Sasgen, I van den Broeke, M Bamber, JL Rignot, E Sørensen, LS Wouters, B Martinec, Z Velicogna, I Simonsen, SB 293 - 303 2012-06-01 application/pdf http://www.escholarship.org/uc/item/09x7r3hj english eng eScholarship, University of California qt09x7r3hj http://www.escholarship.org/uc/item/09x7r3hj Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ CC-BY Sasgen, I; van den Broeke, M; Bamber, JL; Rignot, E; Sørensen, LS; Wouters, B; et al.(2012). Timing and origin of recent regional ice-mass loss in Greenland. Earth and Planetary Science Letters, 333-334, 293 - 303. doi:10.1016/j.epsl.2012.03.033. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/09x7r3hj article 2012 ftcdlib https://doi.org/10.1016/j.epsl.2012.03.033 2017-10-13T22:52:02Z 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; Sørensen 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). © 2012 Elsevier B.V. Article in Journal/Newspaper Greenland Ice Sheet Sea ice University of California: eScholarship Greenland Earth and Planetary Science Letters 333-334 293 303 |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
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; Sørensen 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). © 2012 Elsevier B.V. |
format |
Article in Journal/Newspaper |
author |
Sasgen, I van den Broeke, M Bamber, JL Rignot, E Sørensen, LS Wouters, B Martinec, Z Velicogna, I Simonsen, SB |
spellingShingle |
Sasgen, I van den Broeke, M Bamber, JL Rignot, E Sørensen, LS Wouters, B Martinec, Z Velicogna, I Simonsen, SB Timing and origin of recent regional ice-mass loss in Greenland |
author_facet |
Sasgen, I van den Broeke, M Bamber, JL Rignot, E Sørensen, LS Wouters, B Martinec, Z Velicogna, I Simonsen, SB |
author_sort |
Sasgen, I |
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 |
publisher |
eScholarship, University of California |
publishDate |
2012 |
url |
http://www.escholarship.org/uc/item/09x7r3hj |
op_coverage |
293 - 303 |
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, JL; Rignot, E; Sørensen, LS; Wouters, B; et al.(2012). Timing and origin of recent regional ice-mass loss in Greenland. Earth and Planetary Science Letters, 333-334, 293 - 303. doi:10.1016/j.epsl.2012.03.033. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/09x7r3hj |
op_relation |
qt09x7r3hj http://www.escholarship.org/uc/item/09x7r3hj |
op_rights |
Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
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_ |
1766018181929893888 |