A Preliminary Note on the Atmospheric Turbulent Diffusion over Rough Surfaces

Abstract

This paper theoretically deals with the influences of the surface roughness on the atmospheric turbulent diffusion in the vertical and horizontal directions. Taking account of the fact that the dissipation rate of turbulent energy increases with the roughness parameter of the ground surface, the influences of roughness parameter on the velocity and life-time of the largest turbulon characterizing the diffusion phenomena are obtained. Comparisons of the present results with O. G. Sutton's recent assumption concerning the same problem, introducing the macroviscosity into the Lagrangian correlation coefficient, are carried out.