利用微尺度气象模式(Envi-met)耦合气体污染物扩散模式， 模拟交通尾气对上海市瑞金二路商业楼建设项目的影响。根据输入的建筑物和下垫面分布特征， 结合评价区域特定的风向、 风速、 污染源强度和高度参数， 得到了污染物浓度在评价区域的精细化分布， 同时利用现行法规大气扩散模式对预测结果进行对比分析， 结果表明： 微尺度气象模式的预测结果和法规大气扩散模式的预测结果是比较接近的， 但前者更好地反映了局地建筑和风场的分布特征， 其预测结果更为精细化。将微尺度气象模式应用在环境影响评价中能够在一定程度上弥补目前的法规大气扩散模式在这方面的不足， 具有较好的应用前景。

Using the microscalemeteorological model(Envi\|met) and gaspollutiondispersion model, and taking the Ruijin No2 road businessbuilding project in Shanghai as an example, the influence of the traffic waste gas on the buildings is simulated. Based on the parameters such as the distribution characteristics of buildings and underlying surface, and verified wind direction, wind speed, the intensity and heightof pollutant, the finized spatial distributionof gas pollutant densityover related area is obtained with the Envi\|met model, andfurthermore, the simulations by Envi\|met model are compared with that by regulatory atmospheric dispersion model. Theresults indicate that simulations from two models are relatively similar with each other, and because of covering the rather real distribution characteristics of buildings and wind fields around them, Envi\|met model presents the more reasonable and detaildistribution of gas pollutant. The applications of microscalemeteorological models to environmentimpact assessment can be used to supplement the regulatory atmospheric dispersion modeland seemly will have good prospectsin application.