东北某城市臭氧污染特征及影响因素分析

Analysis on characteristics and influencing factors of ozone pollution in a city in Northeast China

为研究中国东北地区城市O_(3)污染特征,笔者统计了东北地区某典型城市2018-2019年O_(3)、NO_(x)、颗粒物和VOCs等监测数据,结合当地气象数据,利用数理统计手段,对城市近地区域O_(3)污染特征与空气中颗粒物、NO_(x)、VOCs等之间的联系及相关性进行探讨。结果表明:该城市O_(3)污染浓度年度变化呈"单峰型",O_(3)-8h季节变化规律为夏季>春季>秋季>冬季;在24 h范围内,NO_(x)的浓度变化趋向于"双峰型"变化,与O_(3)浓度在8时至18时呈现较好的负相关关系;颗粒物浓度月变化趋势呈现"双峰型"变化,与O_(3)浓度大致呈现负相关关系;O_(3)生成潜势量表现为烯烃>烷烃>芳香烃。对该典型城市的O_(3)污染控制,应该以控制道路交通源为主。

In order to study the characteristics of O_(3)pollution in cities in Northeast China,the authors analyzed the monitoring data of O_(3),NO_(x),particulate matter and VOCs in a typical city in Northeast China from 2018 to 2019.Combined with local meteorological data and using mathematical statistical methods,the relationship and correlation between O_(3)pollution characteristics and airborne particles,NO x,VOCs in urban near ground area are explored.The results show that the annual variation of O_(3)pollution concentration in the city is“single peak type”,and the seasonal variation rule of O_(3)-8h is summer>spring>autumn>winter;within 24-hour,NO_(x)concentration tends to“double peak type”,showing a good negative correlation from 8 o clock to 18 o clock with O_(3)concentration;the monthly variation of particle concentration shows a trend of“double peak type”,and the O_(3)concentration and particle concentration show a negative correlation approximately;Ozone formation potential is shown as olefin>alkane>aromatic hydrocarbon.The control of ozone pollution in this typical city should focus on the control of road traffic sources.