气候变化领域集成服务门户(CCPortal): Measurement report: The effect of aerosol chemical composition on light scattering due to the hygroscopic swelling effect

CCPortal

DOI	10.5194/acp-21-9977-2021
	Measurement report: The effect of aerosol chemical composition on light scattering due to the hygroscopic swelling effect
	Ren R.; Li Z.; Yan P.; Wang Y.; Wu H.; Cribb M.; Wang W.; Jin X.; Li Y.; Zhang D.
发表日期	2021
ISSN	1680-7316
起始页码	9977
结束页码	9994
卷号	21 期号:13
英文摘要	Liquid water in aerosol particles has a significant effect on their optical properties, especially on light scattering, whose dependence on chemical composition is investigated here using measurements made in southern Beijing in 2019. The effect is measured by the particle light scattering enhancement f(RH), where RH denotes the relative humidity, which is found to be positively and negatively impacted by the proportions of inorganic and organic matter, respectively. Black carbon is also negatively correlated. The positive impact is more robust when the inorganic matter mass fraction was smaller than 40% (RCombining double low line0.93, R: the Pearson's correlation coefficient), becoming weaker as the inorganic matter mass fraction gets larger (RCombining double low line0.48). A similar pattern was also found for the negative impact of the organic matter mass fraction. Nitrate played a more significant role in aerosol hygroscopicity than sulfate in Beijing. However, the deliquescence point of ambient aerosols was at about RHCombining double low line80% when the ratio of the sulfate mass concentration to the nitrate mass concentration of the aerosol was high (mostly higher than 1/44). Two schemes to parameterize f(RH) were developed to account for the deliquescent and non-deliquescent effects. Using only one f(RH) parameterization scheme to fit all f(RH) processes incurs large errors. A piecewise parameterization scheme is proposed, which can better describe deliquescence and reduces uncertainties in simulating aerosol hygroscopicity. © Authors 2021
语种	英语
scopus关键词	aerosol; aerosol composition; chemical composition; concentration (composition); hygroscopicity; light scattering; optical property; swelling; 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/246765
作者单位	State Key Laboratory of Remote Sensing Science, College of Global Change and Earth System Science, Beijing Normal University, Beijing, 100875, China; Earth System Science Interdisciplinary Center, Department of Atmospheric and Oceanic Science, University of Maryland, College Park, MD, United States; Centre for Atmosphere Watch and Service, Meteorological Observation Center of China Meteorological Administration, Beijing, China; Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing, 210044, China; School of Electrical Engineering, Chengdu University of Information Technology, Chengdu, 610225, China
推荐引用方式 GB/T 7714	Ren R.,Li Z.,Yan P.,et al. Measurement report: The effect of aerosol chemical composition on light scattering due to the hygroscopic swelling effect[J],2021,21(13).
APA	Ren R..,Li Z..,Yan P..,Wang Y..,Wu H..,...&Zhang D..(2021).Measurement report: The effect of aerosol chemical composition on light scattering due to the hygroscopic swelling effect.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(13).
MLA	Ren R.,et al."Measurement report: The effect of aerosol chemical composition on light scattering due to the hygroscopic swelling effect".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.13(2021).