Abstract:

Land surface temperature(LST)is the indispensable important parameter for many research areas,such as environment,ecology,hydrology,climate,agriculture,shallow geothermal energy,heatisland effect,etc.Now，these parameters can be obtained through satellite infrared remote sensing technology.In this paper,we processed one year’s MODIS dataset of“Land Surface Temperature & Emissivity 8Day L3 Global 1 km”,and obtained the spatial distribution maps for the annual average，annual amplitudes and daily amplitudes of LST and appearing times of the annual minimum LST and diurnal maximum LST in Wuhan Metropolitan Region(WMR).We also compared these maps and the current land use map,and revealed the preliminary regulation of temporal and spatial variation of LST in WMR.Results showed these LST parameters were affected strongly by heat island effect,underlying surface and topography factors.The annual average LST was highest in urban areas，lowest in the Northern and Southern mountain areas and average in the plain areas.There were no marked differences between the annual average LST of inland water(such as the Yangtze River and Han River,Lakes and reservoirs)and that of their neighbor lands,but the annual amplitudes and dual amplitudes of LST of inland waters were significantly smaller than their neighbor lands,and their appearing times of the lowest annual LST and highest dual LST were also lag much behind that of neighbor lands.It is the inevitable outcome that the specific heat capacity of water is greater than that of soil and rock.〖