Abstract
Based on experiments and theoretical reasoning, the authors have analyzed quantitatively the relationship between the desertification and vegetation index (NDVI) and the land surface temperature (LST). The combined information contained in the LST-NDVI space is extracted to form a new index, namely difference index of desertification (DDI), which is then used to identify the severity of desertification. With this index, we can easily get to know biophysical properties of the land surface.
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