Numerical Analysis about Urban Climate Change by Urbanization in Shanghai

Abstract

After the industrial revolution, megalopolis beyond the population of 10,000,000 appears one after another, and makes big impact to the earth environment. The urbanization in Asian developing countries is tremendous. Especially the rapid urban sprawl and the change of land use are bringing urban climate changing such as heat island phenomenon in Shanghai, China in recent years. To evaluate heat island phenomenon in Shanghai by urbanization, this study constructed a land use database using land use map of Shanghai. Using a numerical analysis method, the influence on urban climate with the urban sprawl and the change of land use of Shanghai was evaluated from 1845 to 1995. As a result, analyzed the influence on the urban climate affect by the urbanization of 25km x 19km range, the maximum temperature and average temperature rose by about 1.7ºC because of the rapid sprawl of urban area and the changes of land use for this 150 years in Shanghai.