Characterizing nighttime vertical profiles of atmospheric particulate matter and ozone in a megacity of south China using unmanned aerial vehicle measurements
文献类型：期刊论文
| 作者 | Wang, Zhanyong7; Cao, Ruhui7; Li, Bai6; Cai, Ming5; Peng, Zhong-Ren1,8; Zhang, Guohua9 ; Lu, Qingchang2; Zhang, Jinpu4; Shi, Kai3; Liu, Yonghong5
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| 刊名 | ENVIRONMENTAL RESEARCH
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| 出版日期 | 2023-11-01 |
| 卷号 | 236页码:15 |
| 关键词 | Atmospheric pollutant Vertical distribution Factor analysis Nocturnal boundary layer |
| ISSN号 | 0013-9351 |
| DOI | 10.1016/j.envres.2023.116854 |
| 英文摘要 | Daytime atmospheric pollution has received wide attention, while the vertical structures of atmospheric pollutants at night play a crucial role in the photochemical process on the following day, which is still less reported. Focusing on Guangzhou, a megacity of South China, we established an unmanned aerial vehicle (UAV) equipped with micro detectors to collect consecutive high-resolution samples of fine particle (PM2.5), submicron particle (PM1.0), black carbon (BC) and ozone (O3) concentrations in the atmosphere, as well as the air temperature (AT) and relative humidity (RH) within a 500 m altitude during nighttime from Oct. 24th to Nov. 6th, 2018. The measurements showed that PM2.5, PM1.0, and BC decreased with altitude and were influenced by the nighttime shallow planetary boundary layer (PBL) where BC was more accumulated and fluctuated. In contrast, O3 was positively correlated with altitude. Backward trajectory clustering and Pasquill stability classification showed that advection and convection significantly influenced the vertical distribution of all pollutants, particularly particulate matter. External air masses carrying high concentrations of pollutants increased PM1.0 and PM2.5 levels by 145% and 455%, respectively, compared to unaffected periods. The ratio of BC to PM2.5 indicated that local emissions had a minor role in nighttime particulate matter. Vertical transport caused by atmospheric instability reduced the differences in pollutant concentrations at various heights. Geodetector and generalized additive model showed that RH and BC accumulation in the PBL were significant factors influencing vertical changes of the secondary aerosol intensity as indicated by the ratio of PM1.0 to PM2.5. The joint explanation of RH and atmospheric stability with other variables such as BC is essential to understand the generation of secondary aerosols. These findings provide insights into regional and local measures to prevent and control night-time particulate matter pollution. |
| WOS研究方向 | Environmental Sciences & Ecology ; Public, Environmental & Occupational Health |
| 语种 | 英语 |
| WOS记录号 | WOS:001061688600001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/74783]  |
| 专题 | 有机地球化学国家重点实验室 |
| 通讯作者 | Wang, Zhanyong |
| 作者单位 | 1.Ajman Univ, Hlth Bldg Res Ctr, Ajman, U Arab Emirates 2.Changan Univ, Sch Elect & Control Engn, Dept Traff Informat & Control Engn, Xian 710064, Peoples R China 3.China West Normal Univ, Coll Environm Sci & Engn, Nanchong 637009, Peoples R China 4.Guangzhou Sub Branch Guangdong Ecol & Environm Mon, Guangzhou 510006, Guangdong, Peoples R China 5.Sun Yat Sen Univ, Sch Intelligent Syst Engn, Guangzhou 510006, Peoples R China 6.Shanghai Jiao Tong Univ, Sch Naval Architecture Ocean & Civil Engn, Shanghai 200240, Peoples R China 7.Fujian Agr & Forestry Univ, Coll Transportat & Civil Engn, Fuzhou 350108, Peoples R China 8.Univ Florida, Coll Design Construct & Planning, iAdapt Int Ctr Adaptat Planning & Design, POB 115706, Gainesville, FL 32611 USA 9.Chinese Acad Sci, State Key Lab Organ Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Zhanyong,Cao, Ruhui,Li, Bai,et al. Characterizing nighttime vertical profiles of atmospheric particulate matter and ozone in a megacity of south China using unmanned aerial vehicle measurements[J]. ENVIRONMENTAL RESEARCH,2023,236:15. |
| APA | Wang, Zhanyong.,Cao, Ruhui.,Li, Bai.,Cai, Ming.,Peng, Zhong-Ren.,...&Hu, Xisheng.(2023).Characterizing nighttime vertical profiles of atmospheric particulate matter and ozone in a megacity of south China using unmanned aerial vehicle measurements.ENVIRONMENTAL RESEARCH,236,15. |
| MLA | Wang, Zhanyong,et al."Characterizing nighttime vertical profiles of atmospheric particulate matter and ozone in a megacity of south China using unmanned aerial vehicle measurements".ENVIRONMENTAL RESEARCH 236(2023):15. |
入库方式： OAI收割
来源：广州地球化学研究所
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