The Coefficient of Eddy Viscosity in a Field of Monsoon Wind

Abstract

Hitherto, the equation of molecular diffusion has been applied to that of eddy diffusion without serious precaution, which will be justified when the problem is confined to one dimensional motion, but the extention of such a procedure to two or three dimen_??_ional diffusion meets with some unremovable contradictions. In this paper the present author tried one generalization of the term of eddy diffusion in two dimension empirically, denying the equipartition theory of eddying stress, which, in case of one dimension, accords well with Rossby's theory. As one application of the above derivation, the theory of monsoon wind has been deduced from the view-point of thermal convection current, from which the coefficients of kinematic eddy viscosity and eddy thermal diffusivity have been determined to be about 10¹⁰ cm² sec^-1 in horizontal direction and 10⁵ cm² sec^-1 in vertical direction.