Study on the variation characteristics of ozone and its precursors in Guilin
Using composite observation data from Guilin Environmental Air Monitoring Station and volatile organic compounds online system,the correlation between the characteristics of near surface ozone(O3)pollution and its precursors in Guilin is discussed.The study found that the peak concen-trations of ozone precursors VOCs and Nitrogen Oxides(NOx)in Guilin appeared in spring and au-tumn,while O3 pollution mainly occurred in autumn(September and October)in 2022.During the period of high O3 pollution from September to October,the hourly variation trend of O3 concentration is affected by both precursor emissions and meteorological conditions,which is strongly negatively correlated with its precursor concentration,positively correlated with temperature and light intensity,and negatively correlated with humidity,rainfall,and wind speed.Under weather conditions of high temperature,low humidity,and strong radiation,anthropogenic emissions of O3 precursors NOx and VOCs can easily lead to a rapid increase and accumulation of O3 concentration,which is an important factor causing sustained O3 pollution in Guilin.
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万方数据
