THE CLIMATIC CHANGE OF GLOBAL SOLAR RADIATION OVER THE YELLOW RIVER BASIN DURING 1960 —2000

A series of global solar radiation models of different temporal and spatial scales were developed using the technique of data integration. The accuracy of different models was analyzed thoroughly. The empirical coefficients of monthly single station models, belonging to 35 solar observation stations distributed within and surround the Yellow River Basin, were extended spatially by Inverse Distance Weight Interpolation Method. By virtue of the spatial distribution of coefficients for global solar radiation simulation as well as the relative sunshine duration data observed from 164 convention meteorological stations, the global solar radiation of the Yellow River Basin from 1960 to 2000 were estimated and their climatic change tendency were analyzed in detail. The results show that the global solar radiation is significantly decreased, especially in the seasons of summer and winter.