Study on the temporal and spatial distribution and changes of land surface temperature in winter in Urumqi, Xinjiang

The Urumqi City which located at the foot of the northern slope of the Tianshan Mountains in Xinjiang, has a special basin-type topographic feature, with the long, cold and serious air pollution winter. With the rapid process of urbanization and development in the recent years, whether has the effect of Urban Heat Island(UHI) has been widespread concerned these years. Land Surface Temperature (LST) in urban regions is an important influencing factor and indicator of the Urban Heat Island (UHI). Urumqi City was taken to be the typical study area in this paper, MODIS data in December of every year from 2000 to 2007 were chosen to take the LST retriving with the Split Window Algorithm (Qin, Mao, etc.), which is a mature algorithm, with higher precision and simple method, and the average absolute error of LST retriving products were ± 1.2 °C, according to the analysis of the temporal and spatial distribution and changes of LST, the following conclusions had been made: From the Monthly Compositon LST of Urumqi in December from 2000 to 2007, Urban Heat Island (UHI) effect of Urumqi City in winter is not obvious and there is no disciplinary changes of LST and no visible changes in temporal and spatial distribution of LST, in despite of eruptible development of urbanization.

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