区域大气污染数值模拟方法研究

大气污染是一个区域性的环境污染问题,北京大气环境的质量与周边地区污染源的排放有密切关系.将气象模型高级区域预报系统(ARPS)与空气污染模型Models-3耦合进行模拟计算,从检验结果可以看出,模拟值与实测值有较好的一致性,表明该模式系统可以用来研究区域大气污染物传输及相互影响.模拟计算了2002年北京地区各季ρ(PM10)以及山西污染源对北京的贡献,结果表明,在特殊的天气条件下的典型时段,尤其是在西南风气流场控制下,山西污染源对北京空气质量有较大的影响.比较而言,夏季(8月)山西污染源的平均贡献率最大,约为15.44%;冬季(1月)最小,约为2.25%.表明控制北京大气污染不容忽视周边污染源的影响.

Study on the Method of Regional Air Quality Numerical Simulation

As air pollution is a regional environmental problem,the pollutants of surrounding region play a crucial role in the air quality of Beijing.The advanced regional prediction system(ARPS)and the air quality model Models-3 were combined to simulate the concentration,and the test shows that the modeling results are consistent with the monitoring results and the coupled models system can be used to study the transportation and the impact of pollutants from surrounding regions.The seasonal concentrations of PM_(10) during 2002 were simulated,and the influences of pollutants from Shanxi Province on Beijing were studied.It shows that pollutants from Shanxi can impact on Beijing's air quality in special meteorological conditions during typical period.In summer(August) the average contribution ratio of Shanxi Province is relatively high at about 15.44%,and it is low in winter(January) at about 2.25%.It is concluded that to control the emission sources of surrounding region of Beijing can not be ignored when enhancing the air quality of Beijing.