Temperature thresholds for degree-day modelling of Greenland ice sheet melt rates

被引：53
|
作者：
van den Broeke, Michiel [1 ]
Bus, Carlijn [1 ]
Ettema, Janneke [1 ]
Smeets, Paul [1 ]
机构：
[1] Univ Utrecht, Inst Marine & Atmospher Res, NL-3508 TA Utrecht, Netherlands
来源：
GEOPHYSICAL RESEARCH LETTERS | 2010年 / 37卷
关键词：
ABLATION; ENERGY;
D O I：
10.1029/2010GL044123
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
Degree-day factors (DDFs) are calculated for the ice sheet ablation zone in southwest Greenland, using measurements of automatic weather stations and a regional atmospheric climate model. The rapid increase of DDFs for snow and ice towards higher elevations is caused by the increasing dominance of short daytime melting and nocturnal refreezing. This spatial inhomogeneity can be avoided by choosing a lower threshold for daily average 2 m air temperature (268 K instead of 273.15 K) for the degree-day calculation. Citation: van den Broeke, M., C. Bus, J. Ettema, and P. Smeets (2010), Temperature thresholds for degree-day modelling of Greenland ice sheet melt rates, Geophys. Res. Lett., 37, L18501, doi:10.1029/2010GL044123.
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页数：5
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