Analytic Predictions of Turbulence Statistics in Neutral Surface Layer of the Atmosphere

[摘要] A turbulence model is proposed for the prediction of the asymptotic behavior of turbulence statistics in neutral surface layer. Following equations are analytically investi-gated: ones for the second-order moments of turbulence, and one for its length scale. A few empirical assumptions are made for the turbulent transport terms in the equations of second-order moments. With the present model, are deductively obtained the well-known semiempirical results: the turbulent length scale proportional to the mixing length, and the logarithmic vertical distributions for the mean wind velocity and the mean potential temperature. The asymptotic solutions of kinematic and thermal second-order moments of turbulence are also obtained.

[学科分类] 大气科学