营口市大气污染物来源解析数值模拟研究

A numerical simulation study on source analysis of air pollution in Yingkou

该研究基于WRF-CMAQ搭建本地化模型对营口市2018年1、4、7和10月的大气污染状况进行模拟,并采用零置法定量解析SO_(2)、NO_(2)、PM_(10)和PM_(2.5)的来源。研究发现:营口市大气污染总体呈现出“西北部沿海地区污染重、东南山区污染轻”的态势,污染高值区主要集中在西南沿海人口较为稠密地区。4个季节中,钢铁源对PM_(10)的贡献率在16%~24%,全年平均为20%;对PM_(2.5)的贡献率在16%~20%,全年平均为18%,对SO_(2)的贡献率在27%~37%,全年平均为30%;扬尘源对PM_(10)与PM_(2.5)年均贡献率分别为25%与28%;移动源对NO_(2)的贡献率为34%。

The WRF(weather research and forecasting model)along with CMAQ(congestion mitigation and air quality model)are used to build a localized model for simulating air pollutants of Yingkou in January,April,July,October in 2018.And the quantitative analysis based on the Zero-Out method for analyzing sources of SO_(2),NO_(2),PM10,PM_(2.5)is also performed.It is found that the air pollution in Yingkou represents a trend of"a heavy pollution in the northwest coastal areas and a light pollution in the southeast mountainous areas",and the areas with high pollution values are mainly in the densely populated areas in the coastal areas in southwest.In the four seasons,the contribution rate of steel source to PM_(10)is 16%~24%and the annual average is 20%.The contribution rate to PM_(2.5)is 16%~20%and the annual average is 18%.The contribution rate to SO_(2)is 27%~37%and the annual average is 30%.The average annual contribution rates of dust source to PM10 and PM_(2.5)are 25%and 28%,respectively.The contribution rate of mobile sources to NO_(2)is 34%.