Characteristics of land surface temperture (LST) within the third ring road of Shenyang

摘要

Urban heat island (UHI) effect becomes hot spot in the field of urban climatology in the recent decades. Two sampling belts on the Landsat TM/ETM+ image across the center point of main urban area of shenyang were selected along the E-W and S-N directions in order to analyse the characteristics of UHI effect and discuss the relationships between LST and UHI source or sink. The results indicate that for the E-W direction sampling belt, the maximum and minimum LST values were 37.46°C and 33.44°C in 2001 respectively, while those were 34.61°C and 33.30°C in 2010. For the S-N direction sampling belt, the corresponding values were 34.53°C and 29.27°C in 2001, 34.47°C and 29.69°C in 2010. LST fluctuated significantly in the E-W direction sampling belt in 2010 and the difference value was 4.01°C, so was in the S-N direction sampling belt in 2010 and the difference value was 4.78°C. LST of the grid was a positive correlation with LST of the UHI source area of grid in 2001 and 2010, so was with that of UHI sink area in 2001 and 2010. LST of grid was a positive correlation with UHI source area.