It has been known for some time that during a clear, calm night the temperature of a snow surface falls much below the temperature of the air within even a few centimeters of the surface, The snow surface radiates energy practically as a black body; and receives, by conduction from tho snow and air, and also by radiation from the atmosphere, less energy than it loses through its own radiation; and consequently its temperature decreases. However, if the wind movement increases, considerable heat is transported to the surface from the
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H. Wexler (1936) studied this question.