重庆市区冬季热岛和湿岛效应的研究

A STUDY ON THE EFFECTS OF THE HEAT AND WET ISLAND IN THE CITY OF CHONGQING DURING WINTERTIME

1989年12月15日——1990年1月15日,重庆雾害课题组在市区进行了包含地面气象、边界层气象和大气污染等多种项目的外场综合观测。本文利用此观测资料,分析了城市热岛的水平分布,热岛和湿岛的垂直结构及其成因。

By using the observational data obtained in the city of Chongqing about the boundary layer meteorology in the period from Dec. 15,1989 to Jan. 15,1990,analysis is made on the horizontal distribution vertical structure of the urban heat island, and the factors affecting its intensity. The wet island accompanying with the city's heat island is also analyzed. The Results indicate that af-ter 20 : 00 the center of the city and the Changjiang River were shrouded in an arched layer of warm and humid airs. The air temperature and specific humidity at the heights of 200 ?300m above the river surface were considerably higher than those in the suburban areas. With the shift of mountain wind to valley wind,the structures of the heat and wet islands disappear at 14 ?00 of the next day. Factors affecting the intensity of the heat island,such as the development of the city, air pollution , topography, the water surface of the Changjiang and Jialingjiang Rivers, and the meteorological conditions are also examined.