Study on Regional Distribution of Surface Heat and Radiation Balance Components over South Ningxia

In studying on the components of surface radiation balance and heat balance over inhomogeneous landscape, the utilization of satellite remote sensing is indispensable. In this paper, a parameterization method based on the data of Landsat-7 ETM+ and 22 weather stations is proposed for deriving the regional distributions of the components of radiation and heat balance on surface over the South Ningxia area. The South Ningxia area is classified into five surface types, regional distributions of components for both balance are calculated for each type. Further more, distribution maps and frequency distribution of the parameters and components is given out. The results indicate: All regional distributions are obvious and regular and characterized by their terrain nature. The figures of the mountains and rivers are very clear for flourish vegetation growing there. It can be seen that the derived regional distributions of surface radiation balance and surface heat balance components for the whole mesoscale area are in good accordance with the land surface status.