On ‘Land and Sea Breezes’

Abstract

It is an observational fact that on an average summer day the wind vector of the sea breeze describes an ellipse-like curve, of which long axis deflects a little to the right from the perpendicular to the coast, though on individual days the breeze may come somewhat discontinuously and the direction may not change smoothly. This fact can be explained by taking up the terms of the earth's deflecting force in the equations of motion. The author also calculated the values of the elements in the upper layers and made the entire configuration of the circulation clear. He first treats of a model case that the eddy viscosity ν=5×10⁵, the distance the breeze invades 39km, and the latitude ψ=45° and compares with it the cases of different values of these constants._??_cf. Fig. 2_??_5. Secondly he shows that the problems of the breezes of a circular island are similarly solvable and almost all formulae and numerical values got for those at a straight coast are available without much modification if only J-functions are used instead of triangular functions with regard to the radial distribution of the elements.