Vertically resolved meteorological adjustments of aerosols and trace gases in Beijing, Taiyuan, and Hefei by using RF model
文献类型：期刊论文
| 作者 | Khayyam, Junaid2,3,4; Xie, Pinhua1,2,3,4 ; Xu, Jin3; Tian, Xin; Feng, Hu2,3; Qinjin, Wei2
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| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
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| 出版日期 | 2024-10-20 |
| 卷号 | 948 |
| 关键词 | Air pollution Meteorological adjustments Vertical profile Machine learning |
| ISSN号 | 0048-9697 |
| DOI | 10.1016/j.scitotenv.2024.174795 |
| 通讯作者 | Xie, Pinhua(phxie@aiofm.ac.cn) ; Xu, Jin(jxu@aiofm.ac.cn) |
| 英文摘要 | Air pollution represents a complex phenomenon defined by the presence of various gases and particulate matter, leading to intricate spatio-temporal fluctuations. This study aims to enhance our understanding of how meteorological factors influence trace gases and aerosols, exacerbating air pollution in various geographical locations, specifically in Beijing's Fengtai (BJFT), Taiyuan City (SXTY), and Hefei's Science Island (HFDP). The study employs 2D-MAX-DOAS observations and utilizes the Random Forest (RF) model to decouple the influence of meteorological conditions from pollutant data. The vertical profile of nitrogen dioxide (NO2), 2 ), sulfur dioxide (SO2), 2 ), formaldehyde (HCHO), and aerosols at each study site was classified into four distinct layers, followed by conducting a meteorological decoupling analysis on each layer. This decoupling analysis demonstrates that meteorology significantly influences aerosols across all sites, with reductions ranging from 75 % to 95 % after de- weathering. SO2 2 shows minimal susceptibility, with the changes ranging from +20 % to +60 % after de- weathering. Among all sites, BJFT's pollutants exhibit less susceptibility overall, while pollutants at HFDP are more susceptible. The findings further reveal significant meteorological interventions in pollutants in surface layers (0.05 km and 0.2-0.4 km) at BJFT, with some exceptions at SXTY. However, pollutants, particularly NO2 2 and aerosols in higher layers (0.6-0.8 km and 1.0-1.2 km) at HFDP, also experience significant meteorological interferences. The findings at HFDP and SXTY reveal that removing meteorological influence also adjusts the profile shape of pollutants. For instance, the NO2 2 profile at HFDP during the winter season shifted from a bimodal to an exponential shape after de-weathering. Overall, this study sheds light on the complex interplay between meteorological factors and trace gases at various altitudes across different geographic locations, offering insights crucial for holistic and effective pollution mitigation strategies. |
| WOS关键词 | AIR-POLLUTION ; MAX-DOAS ; NORMALIZATION ; CHINA ; HCHO ; SO2 ; NO2 |
| 资助项目 | CAS-TWAS Presidential Fellowship ; National Natural Science Foundation of China[42105132] ; National Natural Science Foundation of China[42030609] ; National Key Research and Development Program of China[2022YFC3700303] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001278920800001 |
| 出版者 | ELSEVIER |
| 资助机构 | CAS-TWAS Presidential Fellowship ; National Natural Science Foundation of China ; National Key Research and Development Program of China |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/137375]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 通讯作者 | Xie, Pinhua; Xu, Jin |
| 作者单位 | 1.Anhui Univ, Inst Phys Sci & Informat Technol, Hefei 230601, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China 3.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Hefei Inst Phys Sci, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China 4.Chinese Acad Sci, Hefei Inst Phys Sci, Hefei 230031, Peoples R China |
| 推荐引用方式 GB/T 7714 | Khayyam, Junaid,Xie, Pinhua,Xu, Jin,et al. Vertically resolved meteorological adjustments of aerosols and trace gases in Beijing, Taiyuan, and Hefei by using RF model[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2024,948. |
| APA | Khayyam, Junaid,Xie, Pinhua,Xu, Jin,Tian, Xin,Feng, Hu,&Qinjin, Wei.(2024).Vertically resolved meteorological adjustments of aerosols and trace gases in Beijing, Taiyuan, and Hefei by using RF model.SCIENCE OF THE TOTAL ENVIRONMENT,948. |
| MLA | Khayyam, Junaid,et al."Vertically resolved meteorological adjustments of aerosols and trace gases in Beijing, Taiyuan, and Hefei by using RF model".SCIENCE OF THE TOTAL ENVIRONMENT 948(2024). |
入库方式： OAI收割
来源：合肥物质科学研究院
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