The Structure Of The Vertical Turbulent Diffusion Coefficient

摘要

Many pressing problems of theoretical meteorology are associated with the concept of the vertical turbulent diffusion coefficient K, which is specified by the relation Q = K|partial deriv q/partial deriv z|. (1)rnHere, Q is the vertical turbulent flux of a substance transported by atmospheric turbulence in the vertical direction z, q is the concentration of this substance in the air. We can consider that q is either the concentration of the atmospheric admixture, air humidity, air temperature, or momentum. The velocity of vertical turbulent pulsations of the air that causes vertical turbulent diffusion is a characteristic of the turbulence. In practice, the standard deviation of the air velocity vertical pulsation denoted as σ_w, is used to describe this parameter. However, up to recently, there was no theory that could relate σ_w and K. This work is an attempt to develop such a theory.