By using the meteorological data and EOS-MODIS data of Dingxi region, some basic ground surface parameters in the dry-farming region in northwest China are derived, and each energy flux is estimated.

• 应用定西地区的气象资料和4次EOS-MODIS卫星资料,对典型的西北半干旱雨养农业区的基本地表特征参数进行反演,并在此基础上对各能量通量进行估算,进而分析了各通量的季节变化。