中文摘要：

为探讨城市化引起的土地利用变化对上海近地面气象要素和臭氧（O3）浓度的影响，运用美国国家大气研究中心等机构共同开发的WRF-Chem模式，在考虑扩大城市用地、运用城市冠层模式以及城市人为热影响的基础上，针对上海地区2个不同发展时期的下垫面土地利用类型，就2007年3次高浓度O3天气过程，设置4组灵敏性试验进行模拟。结果表明，以虹桥机场站为代表的市区受城市化影响温度升高、相对湿度降低、风速减小，日平均温度最高上升3.5 ℃，日平均相对湿度最大降低20%，日平均风速最大减小1.5 m/s；但以青浦站和川沙站为代表的郊区受城市化影响不明显。此外，以卢湾站为代表的市区，O3浓度普遍增加，日均值最高可增加8.3 μg/m^3；但以川沙站和淀山湖站为代表的郊区，O3浓度的变化随着个例的不同有增加也有减少。

英文摘要：

A numerical study was performed to evaluate the impact of urbanization caused by land-use change on surface meteorology factors and ozone （O3） in Shanghai. Urban land cover in 1993 and 2006 were chosen to represent two development periods of urbanization. The expansion of urban area, the function of urban canopy model and the emission of anthropogenic heat were considered as the characteristics of urban areas. The novel WRF-Chem modeling system was applied to simulate three 5-day O3 episodes in 2007, and four sensitive experiments were designed to simulate the change of temperature, humidities and wind. The results showed that urbanization had the potential to increase surface temperatures and decrease relative humidities and wind speeds at Hongqiao Airport （urban meteorological site）. The daily average temperatures at Hongqiao Airport were increased by 3.5 ℃ at most, while daily average relative humidities were reduced by no less than 20%. Daily average wind speeds also decreased by a maximum of 1.5 m/s. However, they were changed slightly at Qingpu and Chuansha （suburb meteorological sites）. Besides, the daily average O3 concentrations were increased by a maximum of 8.3μg/m^3 at Luwan （urban O3 site）, whereas the concentrations changed with different cases at Chuansha and Dianshan Lake （suburb O3 sites）.