泸州市臭氧污染特征分析

Analysis on Characteristics of Ozone Pollution in Luzhou City

为了解近年来泸州市主城区臭氧污染特征,选取2017~2019年泸州市主城区4个空气质量自动监测站发布的臭氧(O_(3))及其前体物二氧化氮(NO_(2))数据,结合同时间段的日最高气温数据,运用Origin2017等技术手段对臭氧与相关参数的变化特征、变化趋势以及相关性进行了分析。结果表明:2017~2019年泸州市主城区O_(3)浓度及污染天数占比逐年上升,O_(3)污染季节主要集中在每年4~9月,污染持续时间有延长的趋势。O_(3)日变化曲线显示出“单峰”型分布特征,一般在15:00~17:00达到最大值。O_(3)与前体物NO_(2)呈负相关关系,与日最高气温呈正相关关系。根据臭氧污染特征,控制臭氧前体物排放,建立大气自动监测组分站对本地区臭氧污染防治至关重要。

In order to understand the ozone pollution characteristics in the main urban area of Luzhou city in recent years,the data of ozone(O_(3))and its precursor nitrogen dioxide(NO_(2))released by four air auto-monitoring stations in the main urban area of Luzhou city during 2017-2019 were selected,combined with the daily maximum temperature data in the same period,the change characteristics,trend and correlation of ozone and related parameters were analyzed by means of Origin2017.The results showed that the proportion of O_(3)concentration and pollution days in the main urban area of Luzhou City increased year by year from 2017 to 2019.The pollution time cause by O_(3)mainly concentrated in April to September every year and the pollution period tended to be prolonged.The diurnal variation curve of O_(3)showed a“single peak”distribution characteristic,which generally reached its maximum value between 15:00 and 17:00.O_(3)concentration was positively correlated with daily maximum temperature,and negatively correlated with the precursor NO_(2) concentration.According to the characteristics of ozone pollution,it is very important to control the emission of ozone precursors and establish an automatic atmospheric monitoring station.