Interactions between Vegetation and Climatic Factors in Typical Arid and Humid Regions

Using the distribution of arid and humid regions of China,the typical arid region (Ejina),the typical semi-arid/semi-humid region(Guangzhong basin/Loess Plateau)and the typical humid region(Poyang Lake basin) were selected as the study areas. Based on the NDVI datasets from 1982 to 2000 and the climatic factors datasets of three study areas from 1981 to 2000,the inactions between vegetation and climatic factors in typical and humid regions were discussed. The results showed that in the responses of vegetation to climate vegetation in the typical arid region (Ejina) and the typical humid region were more sensitive to precipitation and to temperature respectively,while vegetation in the typical semi-arid/semi-humid region (Guangzhong basin/Loess Plateau) was more sensitive to both temperature and precipitation; in the influences of vegetation to climate,there was a remarkable negative correlation between the past winter NDVI and the present summer temperature and a significant positive correlation between the past winter NDVI and the present summer precipitation. Thus,for the typical the typical semi-arid/semi-humid region (Guangzhong basin/Loess Plateau),there exited a significant positive correlation between the present spring NDVI and the present summer temperature.