Estimating Absorption Angstrom Exponent of Black Carbon Aerosol by Coupling Multiwavelength Absorption with Chemical Composition

doi:10.1021/acs.estlett.0c00829

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	Estimating Absorption Angstrom Exponent of Black Carbon Aerosol by Coupling Multiwavelength Absorption with Chemical Composition
	Wang, Qiyuan 1,3; Liu, Huikun 1; Ye, Jianhuai 2; Tian, Jie 1; Zhang, Ting 1; Zhang, Yong 1; Liu, Suixin 1; Cao, Junji 1,3
通讯作者	Wang, Qiyuan(wangqy@ieecas.cn) ; Cao, Junji(cao@loess.llqg.ac.cn)
	2021-02-09
发表期刊	ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
ISSN	2328-8930
卷号	8 期号:2 页码:121-127
摘要	Light absorption by black carbon (BC) and brown carbon (BrC) aerosols determines their impacts on climate warming, and the absorption Angstrom exponent (AAE ) attribution method often is used to distinguish the contributions of the two species to light absorption, but obtaining an accurate value for BC AAE (AAE(BC)) has proven challenging. In this study, a receptor model was coupled with multiwavelength absorption information for light-absorbing aerosols used to retrieve a site-dependent AAE(BC) that reflected the optical properties of the bulk BC aerosol. The results of a positive matrix factorization model showed that AAE(BC )could be separated in contributions from two BC-related factors (pure-BC and BC-rich) during the campaign, and the retrieved average AAE(BC) was 1.19, which is within the range of values obtained through source-related experiments and numerical calculations. The BrC light absorption estimated from AAE(BC) = 1.19 was significantly different from the value (i-e.,AAE(BC) = 1.0) usually assumed in the literature. Our study provides insights that can improve the accuracy in quantifying the light absorption caused by carbonaceous aerosols, especially BrC.
DOI	10.1021/acs.estlett.0c00829
收录类别	SCI ; SCI
语种	英语
资助项目	Key Research and Development Program of Shaanxi Province[2018-ZDXM301] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB40000000] ; National Natural Science Foundation of China[21661132005] ; National Atmospheric Research Program[2017YFC0212200] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2019402]
WOS研究方向	Engineering ; Environmental Sciences & Ecology
项目资助者	Key Research and Development Program of Shaanxi Province ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Atmospheric Research Program ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
WOS类目	Engineering, Environmental ; Environmental Sciences
WOS记录号	WOS:000618878400004
出版者	AMER CHEMICAL SOC
引用统计	被引频次：21[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/16012
专题	粉尘与环境研究室第四纪科学与全球变化卓越创新中心
通讯作者	Wang, Qiyuan; Cao, Junji
作者单位	1.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 2.Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA 3.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
推荐引用方式 GB/T 7714	Wang, Qiyuan,Liu, Huikun,Ye, Jianhuai,et al. Estimating Absorption Angstrom Exponent of Black Carbon Aerosol by Coupling Multiwavelength Absorption with Chemical Composition[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS,2021,8(2):121-127.
APA	Wang, Qiyuan.,Liu, Huikun.,Ye, Jianhuai.,Tian, Jie.,Zhang, Ting.,...&Cao, Junji.(2021).Estimating Absorption Angstrom Exponent of Black Carbon Aerosol by Coupling Multiwavelength Absorption with Chemical Composition.ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS,8(2),121-127.
MLA	Wang, Qiyuan,et al."Estimating Absorption Angstrom Exponent of Black Carbon Aerosol by Coupling Multiwavelength Absorption with Chemical Composition".ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS 8.2(2021):121-127.