SOLAR-RADIATION AND SURFACE-TEMPERATURE IN SHANGHAI CITY AND THEIR RELATION TO URBAN HEAT-ISLAND INTENSITY

To clarify the effect of solar radiation on the intensity of the Shang hai urban heat island, we surveyed 154 daily radiation data at rural X ingzhuang and urban Longhua. A regression equation shows that direct s olar radiation has a positive effect on urban heat island intensity, b ut that the wind velocity and cloudiness have a negative effect. Surfa ce temperature records provided by satellites and the simultaneous obs ervational data of direct solar radiation, atmospheric temperature, cl oud amount and wind velocity from meteorological stations inside and o utside of Shanghai City are used to analyse several typical cases of b oth surface and 1.5 m air temperature urban heat islands in different seasons.