Study on the correlation between PM2.5 and O3 in ambient air in Shenyang
Taking Shenyang,a typical city in Northeast China,as an example,this study analyzes the correlation between the concentrations and components of PM2.5 and O3 in the ambient air of Shenyang by using various monitoring methods,in order to provide technical support for the collaborative control of PM2.5 and O3.The results show that the maximum 8-hour sliding average concentration of O3 in spring and autumn increases first and then decreases with the increase of PM2.5 average daily concentration.In summer,the concentrations of both were positively correlated at 0.01 level.In winter,there was a significant negative correlation between the two concentrations at 0.01 level.The higher the PM2.5 concentration in spring and autumn,the faster the O3 hourly concentration increases;The higher the PM2.5 concentration at night,the faster the O3 hourly concentration decreases.In summer,the hourly O3 concentration increases with the increase of PM2.5 concentration.In winter,the hourly O3 concentration decreased with the increase of PM2.5 concentration.With the increase of photochemical activity level,the correlation between PM2.5 and O3 gradually decreases.The change rate of PM2.5/CO at moderate and severe photochemical activity levels was significantly higher than that at low and mild photochemical activitylevels.The peak value of PM2.5/CO is highly consistent with that of O3.The proportion of SNA(SO42-,NO-3,NH+4)in PM2.5 in summer and autumn was significantly positively correlated with Ox at 0.01 level.The proportion of SOA in PM2.5 in spring,summer and autumn was significantly positively correlated with Ox at 0.01 level.
NETL
NSTL
万方数据
