简易一维陆面过程的数值模拟

A NUMERICAL SIMULATION OF ONE-DIMENSIONAL LAND-SURFACE PROCESS MODEL

In this model, the energy exchange processes in SPAC (Soil-Plant-Atmosphere Continuum) such as net radiant energy Rn, latent heat LE and sensible heat H have been described. Necessary modifications have been made in the parameterization of the internal processes. It can be divided into three parts : soil, plant and a reference level in the atmosphere. Six equations are contained in this model. In order to describe in detail hydro-logical and thermal processes in soil, the soil is divided into 15 layers in logarithm. The fluxes of net radiant energy Rn, latent heat LE and sensible heat Hhave been calculated and compared with the observed fluxes by using the data of Linze, Zhangye and Desert stations, which are in "HEIFE" region and stand for different underlying surfaces. The modeled fluxes agree well with the observed ones. The results show that this model can simulate energy exchange processes over different underlying surfaces. It can be used in the study of climatology and ecology.