2020年辽宁省臭氧污染分析

根据国家城市环境空气质量监测网2020年监测结果,选取辽宁省进行臭氧污染分析。结果表明,辽宁省空气质量达标天数范围为283~350天,平均达标天数比例为83.8%,臭氧为全省最主要的首要污染物;年度上,受新冠肺炎疫情影响2020年臭氧污染较2019年有所改善,全省臭氧浓度呈现西高东低的地域特点;季节上,春夏季内陆城市比沿海城市臭氧污染重,秋季内陆城市比沿海城市臭氧污染重,冬季全省臭氧污染均较轻;月份上,臭氧月均值呈现驼峰状,除1、2、11和12月无臭氧污染日外,5~7月内陆城市臭氧污染重于沿海城市,其余月份沿海城市重于内陆城市,空间分布与臭氧的季节分布具有一致性;臭氧每日呈现正弦波动变化,具体还要根据臭氧生成因素、本地扩散条件及周边污染形势具体分析。

According to the monitoring results of the national urban ambient air quality monitoring network in 2020,the Liaoning Provinces were selected to analyze the ozone pollution.The results show that the range of days for reaching the standard of air quality in the province is 283-350 days,and the average proportion of days reaching the standard is 83.8%.Ozone is the most important pollutant in the province,and the ozone pollution in 2020 is better than that in 2019.The ozone concentration in the province shows the regional characteristics of high in the west and low in the east.Seasonally,ozone pollution in inland cities is more serious than that in coastal cities in spring and summer,ozone pollution in inland cities is more serious than that in coastal cities in autumn,and ozone pollution in the whole province is lighter in winter.In the month,the monthly mean value of ozone shows a hump shape.Except for the days without ozone pollution in January,February,November and December,the ozone pollution in inland cities is more serious than that in coastal cities from May to July,and the spatial distribution is consistent with the seasonal distribution of ozone in other months.Ozone shows a sinusoidal fluctuation every day,which should be analyzed according to ozone generation factors,local diffusion conditions and surrounding pollution situation.