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GEOPHYSICAL RESEARCH LETTERS,
VOL. 33,
L11501,
doi:10.1029/2006GL026444,
2006
Satellite-derived, melt-season surface temperature of the Greenland Ice Sheet (2000–2005) and its relationship to mass balance
D. K. Hall
Cryospheric Sciences Branch, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA
R. S. Williams Jr.
U.S. Geological Survey, Woods Hole Science Center, Woods Hole, Massachusetts, USA
K. A. Casey
Science Systems and Applications, Inc., Lanham, Maryland, USA
N. E. DiGirolamo
Science Systems and Applications, Inc., Lanham, Maryland, USA
Z. Wan
Institute for Computational Earth System Science, University of California, Santa Barbara, California, USA
Abstract
Mean, clear-sky surface temperature of the Greenland Ice Sheet was measured for each melt season from 2000 to 2005 using Moderate-Resolution
Imaging Spectroradiometer (MODIS)–derived land-surface temperature (LST) data-product maps. During the period of most-active
melt, the mean, clear-sky surface temperature of the ice sheet was highest in 2002 (−8.29 ± 5.29°C) and 2005 (−8.29 ± 5.43°C),
compared to a 6-year mean of −9.04 ± 5.59°C, in agreement with recent work by other investigators showing unusually extensive
melt in 2002 and 2005. Surface-temperature variability shows a correspondence with the dry-snow facies of the ice sheet; a
reduction in area of the dry-snow facies would indicate a more-negative mass balance. Surface-temperature variability generally
increased during the study period and is most pronounced in the 2005 melt season; this is consistent with surface instability
caused by air-temperature fluctuations.
Received 28
March
2006;
accepted 2
May
2006;
published 8
June
2006.
Index Terms: 0726 Cryosphere: Ice sheets; 0475 Biogeosciences: Permafrost, cryosphere, and high-latitude processes (0702, 0716); 0720 Cryosphere: Glaciers; 0480 Biogeosciences: Remote sensing.
Read Full Article (file size: 2792290 bytes) Cited by
Citation: Hall, D. K., R. S. Williams Jr., K. A. Casey, N. E. DiGirolamo, and Z. Wan
(2006),
Satellite-derived, melt-season surface temperature of the Greenland Ice Sheet (2000–2005) and its relationship to mass balance,
Geophys. Res. Lett.,
33,
L11501,
doi:10.1029/2006GL026444.
Copyright 2006 by the American Geophysical Union.
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