Physics
Scientific paper
Jun 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3612501e&link_type=abstract
Geophysical Research Letters, Volume 36, Issue 12, CiteID L12501
Physics
49
Cryosphere: Ice Sheets, Cryosphere: Mass Balance (1218, 1223), Global Change: Cryospheric Change (0776), Atmospheric Processes: Regional Modeling, Atmospheric Processes: Polar Meteorology
Scientific paper
High-resolution (˜11 km) regional climate modeling shows total annual precipitation on the Greenland ice sheet for 1958-2007 to be up to 24% and surface mass balance up to 63% higher than previously thought. The largest differences occur in coastal southeast Greenland, where the much higher resolution facilitates capturing snow accumulation peaks that past five-fold coarser resolution regional climate models missed. The surface mass balance trend over the full 1958-2007 period reveals the classic pattern expected in a warming climate, with increased snowfall in the interior and enhanced runoff from the marginal ablation zone. In the period 1990-2007, total runoff increased significantly, 3% per year. The absolute increase in runoff is especially pronounced in the southeast, where several outlet glaciers have recently accelerated. This detailed knowledge of Greenland's surface mass balance provides the foundation for estimating and predicting the overall mass balance and freshwater discharge of the ice sheet.
Bales Roger C.
Bamber Jonathan L.
Box Jason E.
Ettema Janneke
van de Berg Willem Jan
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