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	16807316
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.
关键词	aerosol atmospheric pollution boundary layer feedback mechanism haze mixed layer particulate matter relative humidity surface temperature Beijing [China]China
语种	英语
来源机构	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132321
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]. Atmospheric Chemistry and Physics,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.,20(1).
MLA	Wang Y.,et al."Rapid formation of intense haze episodes via aerosol-boundary layer feedback in Beijing".20.1(2020).