北京大学学报（自然科学版）2017，Vol.53Issue(4)：639-651,13.DOI:10.13209/j.0479-8023.2016.127
滇中地区夏季城市热岛效应的数值模拟研究
Numerical Study of Summertime Urban Heat Island in Dianzhong
摘要
Abstract
In order to study the effect of urbanization and lakes on the urban heat island (UHI) effect of cities in Yunnan midland in summer, the weather research forecasting model (WRF) numerical model is used. The downwind urban heat island is found in these cities in the summer night. The expansion of city will expand the scope of the downwind urban heat island, but the intensity of the heat island would not be enhanced significantly. The presence of the city will change the surface roughness, resulting in the reduction of wind speed near the surface. In the daytime, lakes and the city influence surface wind speed by changing the local thermal difference. The existence of city increases the thermal difference between city and lake, which enhances both the lake-land breeze and the surface wind speed. The presence of city will reduce the supply of low-level moisture, but the impact of urban expansion on moisture is relatively small. In the early morning, the wet island exists in the city (humidity in city is slightly larger than the surrounding area), due to the convergence filled near surface. At other moments, the dry island exists in the city (humidity in city is smaller than the surrounding area), and has the downwind effect as well.关键词
城市热岛/湖陆风/WRF模式/滇中地区Key words
urban heat island/lake-land breeze/WRF model/Dianzhong region分类
天文与地球科学引用本文复制引用
郑亦佳,刘树华,何萍,缪育聪,王姝..滇中地区夏季城市热岛效应的数值模拟研究[J].北京大学学报（自然科学版）,2017,53(4):639-651,13.基金项目
国家自然科学基金(41465001)和国家电网公司科技项目资助 （41465001）
