Abstract:

Urban heat island is more and more severe since urbanization develops rapidly.Month average temperature data of 11 districts in 50 years of shanghai was analyzed,and temperature difference of every 5 years between each station and Chongming was got,showing the extend of heat island from city center to rural areas,especially from 1980s,20th century, with a larger increase of difference in temperature.On the basis of existed theories,one of the main mechanisms of heat island generation——anthropogenic heat emission, was analyzed.All possible heat resources and facilities in urban were studied and categorized based on the flow chart,then calculating methods of 3 phases were compared for different purposes.Heat emitted by carbon and fuel was calculated respectively，in order to estimate the total amount of anthropogenic heat.Meanwhile,annual average temperature of both downtown and suburb,temperature difference,and its relativity to anthropogenic heat were analyzed.Finally,effects on temperature by the usage of airconditioning in summer of Shanghai were studied.The construction distribution of Shanghai was obtained from the digitizing Supposing a relativity between floors and airconditioning density,it was found that heat emitted by airconditioning had a quite good consistency with surface temperature retrieval, which was also proved to be one of the main reason of high temperature in Shanghai city