随着生产的发展,城市规模不断扩大,城市作为一种特殊的下垫面对气候产生明显的影响。无论城市建设还是环境保护等方面都需要城市气候研究成果。杭州是我国著名的风景游览城市和疗养胜地,因此,研究杭州城市气候更具有特殊意义。

Hangzhou (30°E, 120°N) dominanted by monsoon climate, its annual mean tempe-rature is 16.4℃; the average January temperature is 4.4℃, while the average July temperature is 28.5℃. The annual mean precipitation is 1390.9 mm.This paper discusses the differences of climatic elements between the urban dis-tricts of Hangzhou and its suburbs, which are summerized in the following table.The urban heat island of Hangzhou occures every night throughout year. The maximum temperature in the center of the urban heat island is 5.6℃ higher than that of its surrounding countryside.