气候变化领域集成服务门户(CCPortal): Quantifying the effects of mixing state on aerosol optical properties

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DOI	10.5194/acp-22-9265-2022
	Quantifying the effects of mixing state on aerosol optical properties
	Yao, Yu; Curtis, Jeffrey H.; Ching, Joseph; Zheng, Zhonghua; Riemer, Nicole
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	9265
结束页码	9282
卷号	22 期号:14 页码:18
英文摘要	Calculations of the aerosol direct effect on climate rely on simulated aerosol fields. The model representation of aerosol mixing state potentially introduces large uncertainties into these calculations, since the simulated aerosol optical properties are sensitive to mixing state. In this study, we systematically quantified the impact of aerosol mixing state on aerosol optical properties using an ensemble of 1800 aerosol populations from particle-resolved simulations as a basis for Mie calculations for optical properties. Assuming the aerosol to be internally mixed within prescribed size bins caused overestimations of aerosol absorptivity and underestimations of aerosol scattering. Together, these led to errors in the populations' single scattering albedo of up to -22.3 % with a median of -0.9 %. The mixing state metric chi proved useful in relating errors in the volume absorption coefficient, the volume scattering coefficient and the single scattering albedo to the degree of internally mixing of the aerosol, with larger errors being associated with more external mixtures. At the same time, a range of errors existed for any given value of chi. We attributed this range to the extent to which the internal mixture assumption distorted the particles' black carbon content and the refractive index of the particle coatings. Both can vary for populations with the same value of chi. These results are further evidence of the important yet complicated role of mixing state in calculating aerosol optical properties.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000826901800001
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/273644
作者单位	University of Illinois System; University of Illinois Urbana-Champaign; University of Illinois System; University of Illinois Urbana-Champaign; Japan Meteorological Agency; Meteorological Research Institute - Japan; Research Organization of Information & Systems (ROIS); National Institute of Polar Research (NIPR) - Japan; Research Institute for Humanity & Nature (RIHN); National Center Atmospheric Research (NCAR) - USA; National Center Atmospheric Research (NCAR) - USA; National Center Atmospheric Research (NCAR) - USA; Tottori University
推荐引用方式 GB/T 7714	Yao, Yu,Curtis, Jeffrey H.,Ching, Joseph,et al. Quantifying the effects of mixing state on aerosol optical properties[J],2022,22(14):18.
APA	Yao, Yu,Curtis, Jeffrey H.,Ching, Joseph,Zheng, Zhonghua,&Riemer, Nicole.(2022).Quantifying the effects of mixing state on aerosol optical properties.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(14),18.
MLA	Yao, Yu,et al."Quantifying the effects of mixing state on aerosol optical properties".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.14(2022):18.