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Estimating Absorption Angstrom Exponent of Black Carbon Aerosol by Coupling Multiwavelength Absorption with Chemical Composition
Wang, Qiyuan1,3; Liu, Huikun1; Ye, Jianhuai2; Tian, Jie1; Zhang, Ting1; Zhang, Yong1; Liu, Suixin1; Cao, Junji1,3
Corresponding AuthorWang, Qiyuan(wangqy@ieecas.cn) ; Cao, Junji(cao@loess.llqg.ac.cn)
2021-02-09
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
ISSN2328-8930
Volume8Issue:2Pages:121-127
AbstractLight 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.
DOI10.1021/acs.estlett.0c00829
Indexed BySCI ; SCI
Language英语
Funding ProjectKey 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 Research AreaEngineering ; Environmental Sciences & Ecology
Funding OrganizationKey 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 SubjectEngineering, Environmental ; Environmental Sciences
WOS IDWOS:000618878400004
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/16012
Collection粉尘与环境研究室
第四纪科学与全球变化卓越创新中心
Corresponding AuthorWang, Qiyuan; Cao, Junji
Affiliation1.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
Recommended Citation
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.
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