Abstract:

The author retrieved the land surface temperature by using mono-window algorithm from 1990, 2001 and 2006 Landsat TM/ETM+data in Daqing, and analyzed the LST change law follow with Daqing urban expansion from urban heat island intensity, the temperature impact from different types of surface conversion, the gravity transfer. The results showed that: Daqing urban areas, the proportion of urban land and urban expansion index sustained growth; the areas of high temperature zone increased a lot, normal and low temperature zone areas decreased a lot; urban land had the biggest contribution for surface thermal effects; when other surface features converted to urban land, the temperature increased; the direction and intensity of Daqing urban expansion were the same as temperature gravity transfer, so the urban expansion was main reason for surface thermal environment change.