On H. WILD's Hypothesis in the Theory of Foehn Phenomena

Abstract

Causes of descending current in valley are sought based on the theory that with the fall of separation point the current of foehn descends into the valley. II. WILD'S hypothesis is confirmed by ascending current in the lower boundary of turbulent mixing region of jet stream, by the quotation of W. TOLLMIEN's theory of stationary semi-infinite jet stream. It is shown that the effect of one of H. v. FICKER's theory and H. WILD's hypothesis must predominate on account of topographical influences.