The Effect of Coasts on Winds

Abstract

In his study on the effect of coasts on winds, the present author discussed two primary factors, i.e. surface friction and slope of the coastal region which was first introduced by Georgii. In order to discuss the effect of the surface friction, he considered coasts which were practically fat so that no effect due to dynamical ascent of wind up slopes need be considered. The mathematical treatment of air flow over coast3 is studied with simplified assumptions as to the conditions of flow together with the assumption of a periodic surface friction. A wind in the transition from sea to laud experiences a strong retardation or decrease in velocity on account of the increase of friction. The continuity of the air flow demands that at each place at which this decrease occurs there is a corresponding or compensating ascending flow.