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This study focused on Handan, a representative steel industry city, where the characteristics of ozone pollution were systematically analyzed based on atmospheric pollutant and meteorological data from 2014 to 2023. The Random Forest model was utilized to investigate the correlation between key meteorological factors and O3 concentrations, as well as their relative contributions. Furthermore, the WRF-CAMx model, combined with the EKMA curve method, was employed to examine O3 formation sensitivity and corresponding precursor emission reduction strategies in different districts. The results indicated that the monthly average O3-8h concentration exhibited distinct seasonal variations (summer > spring > autumn > winter), with the highest levels of exceedance occurring between June and July. Hourly O3 concentrations followed a unimodal trend, which peaked between 15:00 and 16:00. Correlation analysis revealed that relative humidity (RH), solar radiation (SR), and temperature (T) were significantly correlated with O3 concentrations, with correlation coefficients of -0.69, 0.68, and 0.58, respectively. Their relative contributions were determined to be (24.90±2.41)%, (18.66±2.30)%, and (25.56±2.02)%. It was found that O3 pollution was more likely to occur when T > 30℃ and 36% < RH < 56%. The O3 control zone analysis showed that Handan’s central and western areas were VOCs-controlled, with an optimal VOCs-to- NOx emission reduction ratio of 1.5:1. The eastern districts were identified as NOx-controlled, while other areas required coordinated control of both VOCs and NOx, with an optimal reduction ratio of 1:1.5. These findings provided a scientific basis and policy recommendations for the emission reduction and control of O3 pollution in industrial cities.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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