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dc.contributor.authorHall, Dorothy K.  Concept link
dc.contributor.authorWilliams, Richard S.  Concept link
dc.contributor.authorLuthcke, Scott B.  Concept link
dc.contributor.authorDigirolamo, Nicolo E.  Concept link
dc.date.accessioned2010-08-12T18:40:44Z
dc.date.available2010-08-12T18:40:44Z
dc.date.issued2008
dc.identifier.citationJournal of Glaciology 54 (2008): 81-93en_US
dc.identifier.urihttps://hdl.handle.net/1912/3847
dc.descriptionAuthor Posting. © International Glaciological Society, 2008. This article is posted here by permission of International Glaciological Society for personal use, not for redistribution. The definitive version was published in Journal of Glaciology 54 (2008): 81-93, doi:10.3189/002214308784409170.en_US
dc.description.abstractA daily time series of 'clear-sky' surface temperature has been compiled of the Greenland ice sheet (GIS) using 1 km resolution moderate-resolution imaging spectroradiometer (MODIS) land-surface temperature (LST) maps from 2000 to 2006. We also used mass-concentration data from the Gravity Recovery and Climate Experiment (GRACE) to study mass change in relationship to surface melt from 2003 to 2006. The mean LST of the GIS increased during the study period by ∼0.27°C a−1. The increase was especially notable in the northern half of the ice sheet during the winter months. Melt-season length and timing were also studied in each of the six major drainage basins. Rapid (<15 days) and sustained mass loss below 2000 m elevation was triggered in 2004 and 2005 as recorded by GRACE when surface melt begins. Initiation of large-scale surface melt was followed rapidly by mass loss. This indicates that surface meltwater is flowing rapidly to the base of the ice sheet, causing acceleration of outlet glaciers, thus highlighting the metastability of parts of the GIS and the vulnerability of the ice sheet to air-temperature increases. If air temperatures continue to rise over Greenland, increased surface melt will play a large role in ice-sheet mass loss.en_US
dc.description.sponsorshipThis work was supported by NASA’s Cryospheric Sciences Program.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherInternational Glaciological Societyen_US
dc.relation.urihttps://doi.org/10.3189/002214308784409170
dc.titleGreenland ice sheet surface temperature, melt and mass loss : 2000-06en_US
dc.typeArticleen_US
dc.identifier.doi10.3189/002214308784409170


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