| Based on ozone（O3）and its precursors monitoring data in the urban area of Nanjing in 2016, O3 pollution situations and its variation characteristics, the relationship between O3 and its precursors were studied. The results showed that there were 56 days of O3-8 h value exceeded the limit in National Ambient Air Quality Standard (GB 3095—2012), the over standard rate was 15.3%, the 90th percentile concentration of maximum O3-8 h value was 184 μg/m3, which was 0.15 times over the standard value. The days of O3 over standard mainly concentrated from April to September in Nanjing. O3 diurnal variation showed single peak type, the peak hour appeared at 14:00, O3 concentration increased the most significantly from 8: 00 a.m. to 10: 00 a.m., the increase of hourly concentration exceeded 20%. The concentrations of VOCs and NO2 were negative correlated with O3. The concentrations of VOCs and NO2 were the highest in winter and lowest in summer, and were basically the same in autumn and spring. |
