Abstract: To study the heat island effect in urban area of Changzhou City, a land surface temperature (LST) image was established by using mono-window algorithm to interpret the 6th band of Landsat TM. On September 18th 2006, the day the Landsat TM passed through Changzhou, the heat island intensity of the mean LST in Changzhou urban area was 3.81 K. The spatial distribution pattern of heat island effect in Changzhou could be described as a one piece area in addition to several decentralized associated groups, being consistent with the current urban development pattern, which suggested that the land use/cover change and anthropogenic heat emission induced by urbanization would be considered responsible for the formation of heat island effect. The mean LST of industrial land was significantly higher than that of non-industrial land, which indicated that the anthropogenic heat produced by industrial production had evident effects on the formation of heat island effect and the increase of heat island intensity.

Key words: Grazing Leymus chinensis grassland, Fenced Leymus chinensis grassland, Soil respiration