气候变化领域集成服务门户(CCPortal): Case study of the effects of aerosol chemical composition and hygroscopicity on the scattering coefficient in summer; Xianghe; southeast of Beijing; China

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DOI	10.1016/j.atmosres.2019.03.026
	Case study of the effects of aerosol chemical composition and hygroscopicity on the scattering coefficient in summer; Xianghe; southeast of Beijing; China
	Zou J.; Wang M.; Zhao S.; Wu X.; Zhao L.; Liu J.; Gao W.; Tang G.; Xin J.; Wang L.; Ji D.; Xu H.; Wang Y.; Hu B.
发表日期	2019
ISSN	0169-8095
起始页码	81
结束页码	87
卷号	225
英文摘要	The aerosol scattering coefficient is mainly affected by various factors, such as aerosol chemical composition, hygroscopicity and relative humidity. A comprehensive observation of the chemical and physical properties of aerosols was conducted in Xianghe, southeast of Beijing, from June 15 to 26, 2018. Five specific cases were analysed during this observation: (1) rainy (RA); (2) low visibility during the day (LD); (3) high visibility during the day (HD); (4) low visibility at night (LN); and (5) high visibility at night (HN). The mass percentages of a secondary inorganic aerosol (nitrate, sulfate and ammonium) measured with a high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS) were 64.5% and 68.3% during LD and LN, which were higher than those (63.6% and 46.1%) observed during HD and HN, respectively. The mass percentages of secondary organic aerosol (SOA) and primary organic aerosol (POA) to organic aerosol were 76.6% and 23.4%, respectively, during LD. The hygroscopic parameters κ were 0.59 and 0.60 during LD and LN, which were slightly higher than those (0.57 and 0.58) observed during HD and HN, respectively, indicating that the variation of aerosol chemical composition had a limited impact on hygroscopicity. The average proportion, measured with a single particle aerosol mass spectrometer (SPAMS), of biomass burning, dust, heavy metal, soot-like, sea salt, secondary aerosols and other particles were 12.3%, 2.9%, 16.2%, 36.1%, 8.8%, 21.0% and 2.7%. The average proportions of soot-like and secondary aerosols were 42.4% and 19.2% from 0.2 to 1.0 μm. Although the variation and height of the mixing layer were similar between LD and HD, clouds reduced the solar radiation during LD, which caused a higher relative humidity (RH) (67.5%) than that (45.9%) observed during HD. A larger wind speed below 850 hpa during HN caused the mixing layer height (MLH) to reach 1910 m, which resulted in a lower RH (64.8%) than that (68.0%) observed during LN. The light scattering enhancement factors f(RH) during low visibility events were almost greater than those observed during high visibility events, regardless of they were measured during the day (0–9.7%) or night (0–13.1%). The aerosol hygroscopic growth factor (GF) maintained a similar trend with RH, indicating that RH was the main factor affecting the hygroscopic growth of the aerosol, resulting in the decrease in visibility. © 2019 Elsevier B.V.
英文关键词	Aerosol chemical composition; Hygroscopic growth; Relative humidity; Scattering coefficient; Visibility
语种	英语
scopus关键词	Atmospheric humidity; Heavy metals; Light scattering; Mass spectrometers; Mixing; Soot; Sulfur compounds; Visibility; Wind; Aerosol chemical composition; Aerosol hygroscopic growth factors; Aerosol mass spectrometers; Aerosol scattering coefficient; Chemical and physical properties; Hygroscopic growth; Scattering co-efficient; Secondary inorganic aerosol; Aerosols; aerosol; chemical composition; mass spectrometry; physicochemical property; relative humidity; scattering; summer; visibility; Beijing [Beijing (ADS)]; Beijing [China]; China; Hebei; Xianghe
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162350
作者单位	Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou, 730000, China; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Sun Yat-sen University, Guangzhou, 510275, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
推荐引用方式 GB/T 7714	Zou J.,Wang M.,Zhao S.,et al. Case study of the effects of aerosol chemical composition and hygroscopicity on the scattering coefficient in summer; Xianghe; southeast of Beijing; China[J],2019,225.
APA	Zou J..,Wang M..,Zhao S..,Wu X..,Zhao L..,...&Hu B..(2019).Case study of the effects of aerosol chemical composition and hygroscopicity on the scattering coefficient in summer; Xianghe; southeast of Beijing; China.Atmospheric Research,225.
MLA	Zou J.,et al."Case study of the effects of aerosol chemical composition and hygroscopicity on the scattering coefficient in summer; Xianghe; southeast of Beijing; China".Atmospheric Research 225(2019).