Comments on Certain Boundary Layer Parameterization Schemes Used in Atmospheric Circulation Models.

摘要

This paper discusses two important processes of boundary layer parameterization for use in general circulation models (GCM). The first process,based on the surface constant flux layer theory,is applicable when the first level of a GCM is placed below the surface layer. The second one,based on the Rossby number similarity and generalized similarity theories,is appropriate when the first level of a GCM is above the entire boundary layer. Observation data taken from the Wangara and Kansas field experiments were used to analyze the effect of varying constant flux layer height (CFL) on the surface fluxes computation. Results of analyses with several cases of CFL effects are discussed. Parameterization of the atmosphere boundary layer by the Rossby number and generalized similarity theories is described,and the computations of boundary layer fluxes by these theories are compared. (Author)