2019—2023年自贡市臭氧污染特征及气象条件影响分析  

Analysis of the Impact of Ozone Pollution Characteristics and Meteorological Conditions in Zigong City from 2019—2023

作　　者：钟宗莲 刘忠鹏 方选进 何军 ZHONG Zonglian;LIU Zhongpeng;FANG Xuanjin;HE Jun(Zigong Ecological Environment Monitoring Center of Sichuan Province,Zigong 643030,China)

机构地区：[1]四川省自贡生态环境监测中心站,四川自贡643030

出　　处：《环境影响评价》2025年第2期68-74,82,共8页Environmental Impact Assessment

基　　金：2024年度四川省生态环境保护科技计划项目(2024HB17)。

摘　　要：为研究自贡市臭氧污染特征及气象因素对臭氧污染的影响,对2019—2023年自贡市环境空气监测站点臭氧监测数据和气象数据进行分析。结果表明,监测期间自贡市臭氧年均值在142~161μg.m^(-3)之间,2021年最低,2022年最高;月浓度呈“正态分布”规律,其中4—9月超标明显,3月偶发超标,说明自贡市臭氧污染防治需在3月提前部署;日浓度呈“单峰单谷”变化,谷值多出现于08∶00(或09∶00),峰值多出现于16∶00。在太阳辐射大于800 W·m^(-2)、温度30~35℃之间、相对湿度50%~60%之间、大气压强低于960 hpa时臭氧易出现超标;从国控点位看臭氧污染受东风和东南风影响明显。To study the characteristics of ozone pollution and the impact of meteorological factors on ozone pollution in Zigong City,the ozone monitoring data and meteorological data from the environmental air monitoring stations in Zigong City from 2019 to 2023 were analyzed.The results show that the annual average ozone concentration in Zigong City during the monitoring period was between 142 and 161μg·m^(-3),with the lowest in 2021 and the highest in 2022;the monthly concentration showed a"normal distribution"pattern,with obvious over-standard conditions from April to September,occasional over-standard conditions in March,indicating that ozone pollution control in Zigong City needs to be deployed in March;the daily concentration showed a"single peak and single trough"change,with the trough occurring mostly at 08∶00(or 09∶00)and the peak occurring mostly at 16∶00.Ozone is prone to over-standard conditions when the solar radiation is greater than 800 W·m^(2),the temperature is between 30~35℃,the relative humidity is between 50%~60%,and the atmospheric pressure is below 960 hPa;from the national control point of view,ozone pollution is affected by the east and southeast winds.

关 键 词：臭氧 污染特征 气象条件 自贡 

分 类 号：X511[环境科学与工程—环境工程]