Distribution Characteristics and Potential Source Areas of PM2.5 and O3 in Different Seasons in Yidu City
To study the pollution characteristics and potential sources of PM2.5 and O3 in Yidu City in different seasons,using the online monitoring data and meteorological data of Yidu City from March 2020 to February 2022,the seasonal variation characteristics,meteorological influencing factors and potential pollution sources of PM2.5 and O3 mass concentrations in Yidu City were analyzed.The results showed that the diurnal variation of PM2.5 mass concentration in Yidu City showed a bimodal characteristic,and the seasonal variation of concentration was high in winter and low in summer.The diurnal variation of O3 mass concentration showed a unimodal characteristic,and the seasonal variation of concentration was opposite to that of PM2.5.The meteorological conditions of high humidity,static stability and regional pollution transmission of strong northerly wind had important effects on PM2.5 pollution,while high temperature and moderate humidity had important effects on ozone pollution process.Southerly air flow in spring,summer and autumn was dominant and carried higher pollutant concentration.In winter,air flow from northeast and southwest of Hubei province took a higher proportion and carried higher PM2.5 concentration.The potential source areas of PM2.5 and O3 in Yidu city had seasonal differences.Generally speaking,they were mainly distributed in southern Henan Province,eastern Hubei Province and northern Hunan Province.
NETL
NSTL
万方数据
