Numerical Simulation Research of Land Surface Process in the Region between Cropland and Pasture
农牧交错带陆面过程的数值模拟研究

In this paper,CLM(common land model) is introduced and numerical simulation test is carried out in desert and cropland respectively,and comparing analysis with observational data of corresponding sites is also made in the region between cropland and pasture in naiman of neimeng province in China.The results of this test show that CLM can effectively simulate the characteristics of radiation flux and thermal conduction of soil in both desert and cropland tests.Furthermore,the simulation of CLM can realistically reproduce the response of thermal conduction in soil to weather process which happened during the test period.But in comparing,as for the simulation of longwave radiation flux in whole test period and shortwave radiation flux in dry period,the result of desert test is better than that of the cropland test,because vegetation and soil feature of cropland is more complicated than those of desert,and to specify them exactly is unpractical,which cause the simulative difference of albedo and land surface temperature in cropland test.But for the simulation of thermal conduction,the result of cropland test is better.This indicate that CLM has a better thermal conduction simulating ability to such land surface as cropland which has big water content and is good at maintain water while has a worse ability to those dry land surface as desert.