气候变化领域集成服务门户(CCPortal): Determination of the refractive index of ambient aerosols

CCPortal

DOI	10.1016/j.atmosenv.2020.117800
	Determination of the refractive index of ambient aerosols
	Zhao G.; Li F.; Zhao C.
发表日期	2020
ISSN	1352-2310
卷号	240
英文摘要	The refractive index of ambient aerosols is one of the most important parameters indicating the scattering and absorption properties of aerosols. We proposed a new method for retrieving the refractive index (RI) of ambient particles. The main advantage of our method is that it assimilates the single particle mixing states measured by a single-particle soot photometer, when compared to the traditional optical method of retrieving the ambient aerosol RI. This method was validated by good consistency between the determined RI with this method and retrieved RI with the method of Zhao et al. (2019c) using datasets from field measurements conducted in East China in June of 2018. The results show that the real part of the refractive index of the black carbon (BC)-free particles ranged between 1.37 and 1.51 and this value changed little across different tested wavelengths. The mean complex refractive index for the refractory BC was 1.67 ± 0.67i at 525 nm. The mean imaginary parts of the other non-BC components were 0.019 and 0.023 at 450 nm and 370 nm respectively. Brown carbon contributed to 5%, 13% and 29% of the ambient aerosol light absorption at 525 nm, 450 nm and 370 nm respectively in East China. This study provides the ability to determine the ambient aerosol complex refractive index and these data can be used in models to reduce the uncertainties in estimating aerosol radiative forcing. © 2020
关键词	Black carbon Mixing states Refractive index
语种	英语
scopus关键词	Aerosols; Atmospheric radiation; Carbon; Light absorption; Uncertainty analysis; Aerosol radiative forcing; Ambient aerosols; Ambient particles; Complex refractive index; Field measurement; Imaginary parts; Optical methods; Scattering and absorption; Refractive index; black carbon; brown carbon; carbon; unclassified drug; aerosol composition; black carbon; light effect; light scattering; optical method; particle size; radiative forcing; refractive index; soot; absorption; aerosol; ambient air; Article; China; comparative study; flow rate; light absorption; light intensity; optical depth; optics; particle size; priority journal; radiative forcing; refraction index; soot; time series analysis; China
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248986
作者单位	Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, 100871, China; College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China; Institute of Tropical and Marine Meteorology, China Meteorological Administration, Guangzhou, 510640, China
推荐引用方式 GB/T 7714	Zhao G.,Li F.,Zhao C.. Determination of the refractive index of ambient aerosols[J],2020,240.
APA	Zhao G.,Li F.,&Zhao C..(2020).Determination of the refractive index of ambient aerosols.ATMOSPHERIC ENVIRONMENT,240.
MLA	Zhao G.,et al."Determination of the refractive index of ambient aerosols".ATMOSPHERIC ENVIRONMENT 240(2020).