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- Title
Influence of Anthropogenic and Meteorological Factors on Air Quality in Different Cities.
- Authors
PAN Chao; ZHANG Haiou; LONG Ziyu; XU Jingxin; ZHAO Xiuyong; FAN Jianling
- Abstract
The change of air quality is affected by both anthropogenic emissions and meteorological conditions, but the relative contribution of these two factors is not clear. In the present study, the random forest method was used to analyze the effects of anthropogenic and meteorological factors on the concentrations of six air pollutants in Wuhan, Nanjing and Shijiazhuang in China in 2020. Compared with the situation without lockdown estimated by the model, the concentration of PM2.5, PM10, NO2, CO and SO2 decreased by more than 27% from January to February, and the concentration increased after the lockdown action in April. In contrast, the O3 concentration in the three cities increased by 23%~29% during the lockdown period. Furthermore, based on the comparative results between simulation using the meteorological data in 2020 and using the average meteorological data in 2015-2019, the results showed that the meteorological conditions in winter in Shijiazhuang and Nanjing are not conducive to the diffusion of pollutants, which influenced the concentrations of all pollutants except O3. Generally, the meteorological factors have limited influence on the annual pollutant concentration in these three cities.
- Subjects
SHIJIAZHUANG (Hebei Sheng, China); NANJING (Jiangsu Sheng, China); WUHAN (China); RANDOM forest algorithms; AIR pollutants; AIR quality; POLLUTANTS; STAY-at-home orders
- Publication
Environmental Science & Technology (10036504), 2022, Vol 45, Issue 9, p126
- ISSN
1003-6504
- Publication type
Article
- DOI
10.19672/j.cnki.1003-6504.0444.22.338