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Outline
Based on the civil aviation emission inventory for China in 2019, the impacts of aviation emissions on the atmospheric environment were quantified using the CAMx model. Furthermore, the contributions of various flight phases to ground-level pollutant concentrations and their vertical distribution characteristics were explored. The results showed that aviation emissions were found to contribute 0.045 and 0.26μg/m3 to the annual average ground-level PM2.5 and O3 concentrations in China in 2019, respectively, with significant regional and seasonal variations being exhibited. The impact of aviation emissions on PM2.5 was observed to be greater in winter than in summer, while the higher photochemical reaction efficiency in summer was found to facilitate the generation of O3. The influence of aviation emissions on ground-level PM2.5 concentrations was mainly concentrated during the landing and take-off cycles, whereas O3 formation was primarily attributed to emissions during the cruise phase. The vertical distribution of the contributions of aviation emissions to PM2.5 and O3 concentrations was observed to exhibit pronounced seasonal variations. In summer, the contribution ratios in East China, Central South, and Southwest regions were found to peak at the 5~9km altitude layer (4.7% for PM2.5 and 10.6% for O3), whereas in winter, they were concentrated in the lower 0~2km layer (6.9% for PM2.5 and 10.8% for O3). In contrast, in regions such as Northwest China and Xinjiang, the peak contribution of aviation emissions to PM2.5 concentrations during winter was primarily concentrated in the lower altitude layer below 1km (9.1% for PM2.5 and 5.9% for O3). However, in summer, influenced by dust storms, the peak contribution of PM2.5 concentration in the northwest region was observed at an altitude of approximately 4km (8.1%).
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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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