城市发展对区域气象环境影响的数值模拟:以苏州为例

Influences of urban development on meteorological environment:A case study of Suzhou,eastern China

本文采用中尺度天气模式WRF(Weather Research Forecasting Model),以苏州地区为例,对稳定天气过程下的城市热岛效应进行了数值模拟(2007年7月31日-8月2日).利用Landsat卫星观测的1986年、1995年、2004年、2006年下垫面资料进行了敏感性试验,分析了城市化导致的城市下垫面变化对城市气象环境的影响.结果表明,在这次高温过程中,城市气温一直较郊区高,高温区随着城市扩展而扩大;城市化对郊区气温影响较小,而城市气温会有所增长,且夜间较明显;随着城市的发展,城市热岛强度也随之增长,在夜间增长显著;由于城市下垫面的特征,城市中上升气流区与下沉气流区顺着风向成条带状相间分布,这表明在城市中可能存在水平对流涡旋,并且随着城市的发展,水平对流涡旋强度有增强的趋势.

In this paper,WRF(Weather Research Forecasting model) is used to simulate the urban heat island effect in Suzhou,eastern China.Based on the surface data obtained in 1986,1995,2004 and 2006,sensitive tests are taken to analyze the influences of the changes of urban surface on the meteorological environment.Our study shows that the temperature of the urban area was higher than that of the suburban area,and the urbanization makes the higher temperature area was expanded into the suburban area.The influence of ...