Importance of City Green by Investigation on Evolution of Heat Island in Shanghai City

In recent 40 years the area of heat island in Shanghai city has extended 7～8 times and the intensity of heat island enhanced about one time. It results in the increase of hoting damage. The rapid extension and intensification of heat island in Shanghai since 1980′s are related well with the development of the city construction. It has become a problem urgently to be solved that how the city construction should be programmed rationally in order to reduce the influence of heat island and to keep Shanghai city healthy and sustainable development. The decreasing tendency of heat island effect in the central district in recent years indicates the importance of city greening.

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