Influences of synoptic circulations on regional transport, local accumulation and chemical transformation for PM 2.5 heavy pollution over Twain-Hu Basin, central China
文献类型：期刊论文
| 作者 | Yao, Jingyan8; Bai, Yongqing7; Zhao, Tianliang8; Zhu, Yan6; Sun, Xiaoyun5; Tan, Chenghao3,4; Xiong, Jie7; Luo, Yuehan8; Hu, Weiyang1,2; Yang, Tong8 |
| 刊名 | JOURNAL OF ENVIRONMENTAL SCIENCES
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| 出版日期 | 2025-08-01 |
| 卷号 | 154页码:41-51 |
| 关键词 | Central China Regional transport Circulation classification FLEXPART-WRF Random Forest PM 2.5 pollution |
| ISSN号 | 1001-0742 |
| DOI | 10.1016/j.jes.2024.06.007 |
| 英文摘要 | The Twain-Hu Basin (THB), located in Central China, serves as a key juncture where the northerly "polluted" airflows of the East Asian winter monsoon meet the southerly warm and humid airflows. Using the T-PCA (T-mode Principal Component Analysis) objective synoptic pattern classification, Flexible Particle-Weather Research and Forecasting (FLEXPARTWRF) model, and Random Forest model, we investigate the influences of synoptic circulations on regional transport, local accumulation, and chemical transformation of PM 2.5 during heavy air pollution over the THB in January of 2015-2022. The results show that the transport-type synoptic pattern accounts for 65.16% of heavy PM 2.5 pollution, indicating that regional transport of PM 2.5 dominates the THB's heavy air pollution. The PM 2.5 /CO ratio is higher in the transport-type pattern and positively correlated with PM 2.5 concentrations, reflecting a higher efficiency of chemical transformation to secondary PM 2.5 in transport-type pollution compared with the accumulation-type pollution. Transport-type heavy PM 2.5 pollution is predominantly influenced by upstream anomalous northerly and easterly airflows at the bottom of the high-pressure system, converging with the southern wind in the receptor area over the THB. Accumulation-type heavy pollution exhibits weak wind anomalies in central and eastern China under the control of a uniform pressure field. Furthermore, thermally-induced vertical circulations with sinking airflows in the middle and lower troposphere suppress the vertical air pollutant dispersions. The relative contributions of atmospheric factors for transport-type PM 2.5 heavy pollution events are 38.0% for dynamical driver, 26.8% for thermal driver, and 35.1% for chemical transformation, while in accumulation-type, the contribution rates are 33.9%, 36.3%, and 29.7%, respectively. This study elucidates the influences of synoptic patterns on regional transport, local accumulation, and chemical transformation of PM 2.5 for heavy air pollution, with implications for understanding changes of air quality in the receptor region of regional transport. (c) 2025 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V. |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001403567600001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/82594]  |
| 专题 | 有机地球化学国家重点实验室 |
| 通讯作者 | Bai, Yongqing; Zhao, Tianliang |
| 作者单位 | 1.Nanjing Univ, Sch Environm, 163 Xianlin Rd, Nanjing 210023, Peoples R China 2.Nanjing Univ, State Key Lab Pollut Control & Resource Reuse, 163 Xianlin Rd, Nanjing 210023, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China 5.Anhui Inst Meteorol Sci, Anhui Prov Key Lab Atmospher Sci & Satellite Remot, Hefei 230031, Peoples R China 6.Hubei Meteorol Serv Ctr, Wuhan 430205, Peoples R China 7.China Meteorol Adm, Inst Heavy Rain, Hubei Key Lab Heavy Rain Monitoring & Warning Res, Wuhan 430205, Peoples R China 8.Nanjing Univ Informat Sci & Technol, China Meteorol Adm, Collaborat Innovat Ctr Forecast & Evaluat Meteorol, Key Lab Aerosol Cloud Precipitat, Nanjing 210044, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yao, Jingyan,Bai, Yongqing,Zhao, Tianliang,et al. Influences of synoptic circulations on regional transport, local accumulation and chemical transformation for PM 2.5 heavy pollution over Twain-Hu Basin, central China[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2025,154:41-51. |
| APA | Yao, Jingyan.,Bai, Yongqing.,Zhao, Tianliang.,Zhu, Yan.,Sun, Xiaoyun.,...&Yang, Tong.(2025).Influences of synoptic circulations on regional transport, local accumulation and chemical transformation for PM 2.5 heavy pollution over Twain-Hu Basin, central China.JOURNAL OF ENVIRONMENTAL SCIENCES,154,41-51. |
| MLA | Yao, Jingyan,et al."Influences of synoptic circulations on regional transport, local accumulation and chemical transformation for PM 2.5 heavy pollution over Twain-Hu Basin, central China".JOURNAL OF ENVIRONMENTAL SCIENCES 154(2025):41-51. |
入库方式： OAI收割
来源：广州地球化学研究所
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