Based on MODIS/Aqua LST product (MYD11A1), the temporal-spatial characteristics of land surface temperature (LST) and urban heat island (UHI) from 2003 to 2013 were analyzed, and the relationships between UHI and atmospheric stability, land use covers was studied in Lake Tai Basin.The results show that the number of days of unstable stability class in the region is the largest in the daytime, accounting for 50% of the total number of days and it increases from 2003 to 2010, and then decreases since 2010.The annual variation of neutral class is consistent with the variation of slightly unstable class, while it is opposite to the variation of unstable stability class.The quality of MODIS images decreases as the atmospheric stability changes from unstable to neutral class.The phenomenon of UHI in the urban area is evident under unstable stability, and the UHI intensity decreases as the atmospheric stability turns to neural stability.Due to the fast economic development in Suzhou, Wuxi and Changzhou which leads to the urban area expansion over the last decade, the annual average LST in 2010 is about 1℃ higher and in some newly-built urban area it is up to 3℃ higher than that in 2004.Since the area of high LST area expands widely forming a high-temperature zone around Lake Tai, it is important to analyze the temporal-spatial changes of LST and UHI to study the regional climate effect caused by urbanization.
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