Analysis on Trends and Pollution Characteristics of Ambient Air Quality in Beihai City from 2015 to 2022
Based on the data of the state-controlled environmental air quality automatic monitoring station in Beihai from 2015 to 2022,the variation trend of ambient air quality and concentrations of six air pollutants were analyzed,and its air pollution characteristics were studied.The results showed that the ambient air quality in Beihai had improved significantly.However,the rising of O3 pollution had not been controlled effectively,which leaded to the mismatch between the improvement of overall ambient air quality and the increase of the ratio of days with good air quality in Beihai.The air pollution in Beihai were mainly divided into three stages included the stage dominated by PM25 pollution,the compound pollution characterized by PM25 and O3,and the stage dominated by O3.O3 has become the dominant factor affecting the ambient air quality in Beihai since 2019.Controlled of slightly exceeding the standard has been proved to be effective in increasing the ratio of days with good air quality in Beihai.The pollution period of O3 was mainly observed between September to November,while the outbreak time of PM25 pollution were founded in January,February and December.Precision prevention and control pollution will be the key to continuously improving ambient air quality in Beihai in autumn and winter.
ambient air qualityvariation trendpollution characteristicsozone
NETL
NSTL
万方数据
