Fig. 1. Comparison between simulated total solar radiation and MS-711 observed total solar radiation in July 2018 in Hefei

Fig. 2. Comparison of simulated and monitored O₃ concentrations in July 2018 in Hefei using WRF/CAMx model and a monitoring station (Hupo Shanzhuang)

Fig. 3. Time-lagged correlation characteristics between radiation and O₃ in July 2017

Fig. 4. Time-lagged correlation characteristics between radiation and O₃ under characteristic weather in July 2017. (a) Based on observation data; (b) based on simulation results

Fig. 5. Statistical analysis of O₃ concentration from layer 1 to layer 11

Fig. 6. Average O₃ generation process in Hefei in July 2018. (a) Average O₃ generation process; (b) O₃ generation process during daytime; (c) O₃ generation process during sunny daytime; (d) O₃ generation process during rainy daytime; (e) O₃ generation process during cloudy daytime

Fig. 7. Diurnal variation of average O₃ generation process in near-surface layer (layer 1, ~26 m) in Hefei. (a) Characteristic time during sunny days; (b) characteristic time during rainy days; (c) characteristic time during cloudy days