ENTROPY THEORY AND PARAMETERIZATION OF NONUNIFORM DISTRIBUTION OF PRECIPITATION

In this paper a parameterization of nonuniform distribution of precipitation has been made from the aspect of the maximum entropy theory.Results from theory and observation show that,the density function of precipitation depth on the subgrid scale over the grid area of a climate model is the function of the gamma distribution.On this basis,the relative coverage of snow in the region occupied by vegetation in the grid area of a model is parameterized.Meanwhile the calculated results from the parameterizations are also compared with those from the empirical formulas by some other meteorologists.Results show that it is feasible to parameterize the nonuniform distribution of precipitation over the grid area at the angle of entropy theory.