neighbouring snow-covered and snow-
free surfaces, under either overcast or clear conditions, is negligible. During the day, the impact
of surface
type is slightly increased, but generally less than
30 W m 2 between neighbouring
snow-covered and snow-free regions. Longwave radiation losses can essentially be eliminated
through the combined effects of a thick cloud layer and a cold (bright) snow
/media/vedurstofan/utgafa/skyrslur/2015/VI_2015_006.pdf