气候变化领域集成服务门户(CCPortal): Rapid formation of intense haze episodes via aerosol-boundary layer feedback in Beijing

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DOI	10.5194/acp-20-45-2020
	Rapid formation of intense haze episodes via aerosol-boundary layer feedback in Beijing
	Wang Y.; Yu M.; Wang Y.; Tang G.; Song T.; Zhou P.; Liu Z.; Hu B.; Ji D.; Wang L.; Zhu X.; Yan C.; Ehn M.; Gao W.; Pan Y.; Xin J.; Sun Y.; Kerminen V.-M.; Kulmala M.; Petäjä T.
发表日期	2020
ISSN	1680-7316
起始页码	45
结束页码	53
卷号	20 期号:1
英文摘要	Although much effort has been put into studying air pollution, our knowledge of the mechanisms of frequently occurring intense haze episodes in China is still limited. In this study, using 3 years of measurements of air pollutants at three different height levels on a 325m Beijing meteorology tower, we found that a positive aerosol-boundary layer feedback mechanism existed at three vertical observation heights during intense haze polluted periods within the mixing layer. This feedback was characterized by a higher loading of PM2.5 with a shallower mixing layer. Modelling results indicated that the presence of PM2.5 within the boundary layer led to reduced surface temperature, relative humidity and mixing layer height during an intensive haze episode. Measurements showed that the aerosol-boundary layer feedback was related to the decrease in solar radiation, turbulent kinetic energy and thereby suppression of the mixing layer. The feedback mechanism can explain the rapid formation of intense haze episodes to some extent, and we suggest that the detailed feedback mechanism warrants further investigation from both model simulations and field observations. © Author(s) 2020.
语种	英语
scopus关键词	aerosol; atmospheric pollution; boundary layer; feedback mechanism; haze; mixed layer; particulate matter; relative humidity; surface temperature; Beijing [China]; China
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248068
作者单位	State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 64, Helsinki, 00014, Finland; Institute of Urban Meteorology, China Meteorological Administration, Beijing, China; Joint international research Laboratory of Atmospheric and Earth SysTem sciences (JirLATEST), Nanjing University, Nanjing, China; Aerosol and Haze Laboratory, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology (BUCT), Beijing, China; Centre for Excellence in Atmospheric Urban Environment, Institute of Urban Environment, Chinese Academy of Science, Xiamen, Fujian, 361021, China
推荐引用方式 GB/T 7714	Wang Y.,Yu M.,Wang Y.,et al. Rapid formation of intense haze episodes via aerosol-boundary layer feedback in Beijing[J],2020,20(1).
APA	Wang Y..,Yu M..,Wang Y..,Tang G..,Song T..,...&Petäjä T..(2020).Rapid formation of intense haze episodes via aerosol-boundary layer feedback in Beijing.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(1).
MLA	Wang Y.,et al."Rapid formation of intense haze episodes via aerosol-boundary layer feedback in Beijing".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.1(2020).