Abstract: By means of the ground in situ document from Guangdong 86 weather stations,the temporal and spatial distribution characteristics of bare land and grass land surface temperatures were analyzed.Results demonstrated that the bare land and grass land surface temperatures had the same tendency upon diurnal surface temperature,which was basically synchronized with the pattern of air temperature.The maximum temperature of bare land and grass surfaces occurred earlier than air temperature for about 1.18±0.95h and 1.37±1.05h,respectively,while the intervals between the minimum temperature with air temperature were about 0.20±0.66h and 0.45±0.80h,respectively.The annual variation of lands diurnal maximum,minimum and average temperature,as well as the temperature daily-range had the similar tendency as the permeability land surface,but the temperature daily-range of grass land was less than bare land.The average diurnal temperature,diurnal maximum temperature and diurnal minimum temperature for the bare land and grass surfaces presented obvious feature of latitudinal distribution.Daily average temperature and daily maximum temperature of bare land and grass increased from south to north in the summer half year and had opposite situation in the winter half year.Due to the urban heat island,the bare and grass land surface temperatures in Guangzhou as well as in the nearby stations were relatively higher than that of the around areas.

Key words: Bare land and grass land, Bare land and grass land, Land surface temperature, Temporal and spatial distribution characteristics