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The Study on Driving Factors and Models of NDVI Change Based on Remote Sensing and GIS in China

Gao Zhiqiang and Liu Jiyuan (Institute of Remote Sensing Applications, Chinese Academy of Sciences, Beijing  
On the basis of research on sample strips and typical area, the factors of precipitation, temperature and types of land vegetation cover which effect the changes of the normalized difference vegetation index (NDVI) were analyzed by correlation analysis method. The conclusions are that the changes of NDVI are complicated in China, although the changes are controlled by the factors of precipitation, temperature and types of land vegetation cover, but the status of three factors which can control the changes of NDVI is different in different place and at different time, the concept model of three factors (precipitation, temperature and types of land vegetation cover) effecting the changes of NDVI is I ndv = F(x, y, z) , the model describes the relations between the changesof NDVI and three factors from the concept point of view.
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