Study On Relationship Of LST And Coverage Of Vegetation In The North-Tianshan Mountain Areas

This paper uses Single-Window and Split-Window which are the most famous arithmetic to deduce the LST. By dint of remote sensing, this paper uses the brightness of MODIS band31 and MODIS band32 to deduce the LST of North-Tianshan Mountain areas between the July of 2000 and 2005. Then we divide the area into high temperature (40℃ -60℃.Including 40℃ and 60℃), middling temperature (30℃-40℃. Without 40℃, but including 30℃) and low temperature (0℃-30℃. Without 30℃, but including 0℃). At the same time we use the brightness of MODIS band1 and band2 to calculate NDVI of this area, and translate it into coverage of vegetation. We do some research by combining LST with coverage of vegetation, then the result indicates that 40%-60% coverage of vegetation and 10%-20% coverage of vegetation have the best relationship with LST. By further analysis we can draw the following conclusion:(1) The change of temperature between 2000 and 2005The percentage of 40℃-60℃ LST was 49.99% in the whole area, and raising sharply. The percentage of 30℃-40℃ LST was 17.64% in the whole area, and declining sharply. The percentage under 30℃ LST was 25.75% in the whole area, and declining sharply.(2) The coverage of vegetation between 2000 and 2005The area of 60%-100% coverage of vegetation increased, especially the 80%-100% coverage of vegetation. The coverage of vegetation between 20% and 60% declined. The coverage of vegetation under 20% trends to increase, especially the coverage of vegetation between 10% and 20%. But the coverage of vegetation between 0% and 10% increased slowly.(3) The analysis of relationship between LST and coverage of vegetationHigh temperature of 40℃-60℃ has the contrary relationship with 40%-60% coverage of vegetation, but has the just relationship with 10%-20% coverage of vegetation. Middling temperature of 30℃-40℃ has the just relationship with 40%-60% coverage of vegetation, but has the contrary relationship with 10%-20% coverage of vegetation. Low temperature of 0℃-30℃ has the just relationship with 40%-60% coverage of vegetation, but has the contrary relationship with 10%-20% coverage of vegetation.