2008年北京奥运交通限制效果的模式研究

Study of Traffic Restriction Effects on Air Quality during Beijing Olympic Games in 2008 Using CMAQ Model

利用美国国家环保署(EPA)开发的区域多尺度空气质量模式Models-3/CMAQ研究了北京城区奥运交通限行期间VOC、NOX和O3的浓度变化状况。结果表明:Models-3/CMAQ模式能够较好地反映VOC、NOX和O3浓度的变化趋势;交通限行造成的机动车排放源削减使北京奥运期间大气VOC浓度平均减少约12%,NOX浓度平均减少约21%,而O3浓度则平均增加约22%。

The Models-3/CMAQ（Third-Generation Air Quality Modeling System）developed by EPA was employed to simulate the variations of VOC,NOX and O3 concentration in urban area of Beijing during the Olympic games in 2008.It showed that the simulations were all in agreement with the observations.The mean concentration of NOX decreased about 21%,VOC decreased about 12% and while O3,increased about 22% due to the decrease of vehicle emissions during Beijing Olympic Games.