台州市区臭氧污染特征及来源解析

利用台州市区2013—2017年O 3监测数据分析其污染特征,并采用CMAQ模型研究各类污染源对O 3的贡献率。结果表明:台州市区O 3年均浓度稳定,月均浓度4—10月较高,日小时浓度呈单峰型,峰值出现在13:00左右;在温度较高、相对湿度50%~80%、风速1.0 m/s^3.0 m/s、风向为偏东时O 3浓度相对较高,易出现超标现象;本地排放源是O 3形成的主要来源,各季节贡献率略有差异,分别为春季(72.28%)、夏季(69.95%)、秋季(69.24%)、冬季(66.28%);工艺过程源、道路移动源和居民生活源是O 3形成的3大来源,贡献率分别为26.32%、12.89%和9.91%。

Study on Pollution Characteristics and Source Apportionment of Ozone in Taizhou

The characteristics of O 3 pollution in Taizhou were analyzed by the monitoring data from 2013 to 2017,and the contribution rate of each source was studied by CMAQ model.The results showed that the annual average concentration of O 3 was stable in recent years.The monthly average concentration was high from April to October.The diurnal change of hourly concentration was unimodal,the peak appeared at around 13:00.The concentration was high in the conditions of high temperature,50%~80%of relative humidity,1.0 m/s^3.0 m/s of wind speed and easterly winds,and was easy to exceed the standard limit.O 3 pollution was mainly contributed by local emissions.The contribution rate was 72.28%in spring,69.95%in summer,69.24%in autumn and 66.28%in winter.The three largest contributors to O 3 were industrial production(26.32%),mobile source(12.89%)and domestic pollution source(9.91%).