Study on Characteristics of Ozone Pollution and Objective Typing of Atmospheric Circulation in Shantou City from 2020-2022
In this article,the environmental air automatic monitoring data and meteorological data of Shantou City from 2020 to 2022 were used to statistically analyze the characteristics of ozone pollution changes in Shantou City during the pollution weather process.The self-organizing feature mapping(SOM)method was applied for synoptic classification related to surface ozone pollution in Shantou basded on NCEP reanalysis data from 2020 to 2022.The results showed that the atmospheric circulation types below are prone to cause ozone pollution,including the East China Sea cyclone trough type(autumn),the high pressure rear and South China Sea low pressure type(spring),the weak high pressure bottom type(autumn),and the weak high pressure bottom type(autumn),the trough back ridge front type(spring)and the subtropical high control type(autumn).The corresponding ozone pollution stations are 125(16％),120(15％),115(14％),101(13％),and 78(10％),respectively.Through analyzing the characteristics of ozone pollution in Shantou and the main sources of regional transmission of air masses,it was found that ozone pollution is more prone to occur in autumn and spring in Shantou.Classifying the trajectory of air masses in the past three years(2020-2022),the main sources of ozone pollution are the northeast coast,southwest coast,and northern inland.
Objective weather classificationOzone pollutionCirculation typeSOM model
NETL
NSTL
万方数据
