Wind Direction on the Summit of mt. Fuji by the Wind Channel Experiment

Abstract

On the summit of Mt. Fuji, the direction of wind is generally the west, but we have often experienced that the wind was east sometimes. Such east wind has been supposed to be due to the effect of contrary air current which is sucked up along the leeside mountain sloop in spite of the real wind direction, at this height, being the west.
I tried to make an expriment to examine the figure of such air current in a wind channel by using a model of Mt. Fuji which is 1/10000 in real size.
By this experiment, this air current was shown as an effect of being sucked up in the leeside of the mountain as we have supposed and this contrary wind, coming across the leeward mountain summit, occurs when the height of the windward mountain summit is not less than that of the leeward mountain summit, and it depends on neither the inclination of mountain sloop nor the existence of the crater.