Show simple item record

contributor authorSchlatter, Thomas W.
date accessioned2017-06-09T17:23:24Z
date available2017-06-09T17:23:24Z
date copyright1972/10/01
date issued1972
identifier issn0021-8952
identifier otherams-8435.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4227678
description abstractThe physical processes occurring within a perennial snow cover and at its surface are discussed with particular emphasis on monthly variations in Antarctic snow. Results of a one-year simulation of physical processes In snow are compared with 1958 data at Mirny and Pionerskaya, Antarctica. The simulation demonstrates the following: first, solar radiation is effective to a depth of 50 cm or so, but longwave radiation cools the surface alone, causing the ?greenhouse? effect first observed in snow at least four decades ago. Highest summertime temperature and initial snowmelt thus occur not at the surface but roughly 10 cm below It. Second, the percolation of meltwater with eventual refreezing during the subsequent winter is the most efficient mechanism for modifying the temperature profile at depths of several meters of more. Third, concerning the surface energy budget, at temperatures below ?20C, atmospheric sensible heat flux approximately compensates net radiation throughout the year. When the temperature nears 0C (only in summer), the surplus of net radiation Is used primarily for changes of phase?sublimation and possibly melting; little energy is used to heat the snow. Then latent beat flux approximately compensates net radiation.
publisherAmerican Meteorological Society
titleThe Local Surface Energy Balance and Subsurface Temperature Regime in Antarctica
typeJournal Paper
journal volume11
journal issue7
journal titleJournal of Applied Meteorology
identifier doi10.1175/1520-0450(1972)011<1048:TLSEBA>2.0.CO;2
journal fristpage1048
journal lastpage1062
treeJournal of Applied Meteorology:;1972:;volume( 011 ):;issue: 007
contenttypeFulltext


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record