Light Absorption Properties of Organic Aerosol from Wood Pyrolysis: Measurement Method Comparison and Radiative Implications

doi:10.1021/acs.est.0c01475

	Light Absorption Properties of Organic Aerosol from Wood Pyrolysis: Measurement Method Comparison and Radiative Implications
	Li, Xinghua 3; Xiao, Maodong 3; Xu, Xuezhe 1; Zhou, Jiacheng 1; Yang, Kaiqiang 3; Wang, Zihao 3; Zhang, Weijun 1; Hopke, Philip K.2,4; Zhao, Weixiong 1
刊名	ENVIRONMENTAL SCIENCE & TECHNOLOGY
	2020-06-16
卷号	54
ISSN号	0013-936X
DOI	10.1021/acs.est.0c01475
通讯作者	Li, Xinghua(lixinghua@buaa.edu.cn) ; Zhao, Weixiong(wxzhao@aiofm.ac.cn)
英文摘要	Growing evidence indicates that organic aerosol (OA) is a significant absorber of solar radiation. Such absorptive OA is known as "brown carbon" (BrC). However, a formal analytical method for BrC is currently lacking although several methods have been applied to determine its absorption properties. Reported imaginary refractive index (k(OA)) values from various combustion sources span 2 orders of magnitude. Measurement methods are an important factor affecting this k(OA) variation. In this work, isolated OA from wood pyrolysis was used to compare four methods to determine absorbing properties of OA. The generated aerosol was lognormally distributed, spherical, and nearly pure organic matter. Optical closure was considered as the reference method. k(OA) calculated from the extract bulk light absorbance measurement was comparable to that determined by optical closure. k(OA) and mass absorption cross section obtained by online and offline filter-based transmission measurements were similar, but 3.5 to 5.0 times greater than those determined by optical closure. Absorption Angstrom Exponents determined by the four methods were comparable and ranged from 6.1 to 6.8. A clear-sky radiative transfer model implied that using the optical parameters derived from different methods in the full climate model could produce different radiative impacts of primary OA emissions.
资助项目	National Natural Science Foundation of China[41775121] ; National Natural Science Foundation of China[41575119] ; National Natural Science Foundation of China[1908085QD157]
WOS关键词	BROWN CARBON ; BLACK CARBON ; AETHALOMETER ; WATER ; COMBUSTION ; ATMOSPHERE ; EMISSIONS ; EXTRACTS ; MODEL
WOS研究方向	Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000542229600015
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/43163]
专题	中国科学院合肥物质科学研究院
通讯作者	Li, Xinghua; Zhao, Weixiong
作者单位	1.Chinese Acad Sci, Lab Atmospher Physicochem, Anhui Inst Opt & Fine Mech, Hefei 230031, Anhui, Peoples R China 2.Clarkson Univ, Ctr Air Resources Engn & Sci, Potsdam, NY 13699 USA 3.Beihang Univ, Sch Space & Environm, Beijing 100191, Peoples R China 4.Univ Rochester, Sch Med & Dent, Dept Publ Hlth Sci, Rochester, NY 14642 USA
推荐引用方式 GB/T 7714	Li, Xinghua,Xiao, Maodong,Xu, Xuezhe,et al. Light Absorption Properties of Organic Aerosol from Wood Pyrolysis: Measurement Method Comparison and Radiative Implications[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2020,54.
APA	Li, Xinghua.,Xiao, Maodong.,Xu, Xuezhe.,Zhou, Jiacheng.,Yang, Kaiqiang.,...&Zhao, Weixiong.(2020).Light Absorption Properties of Organic Aerosol from Wood Pyrolysis: Measurement Method Comparison and Radiative Implications.ENVIRONMENTAL SCIENCE & TECHNOLOGY,54.
MLA	Li, Xinghua,et al."Light Absorption Properties of Organic Aerosol from Wood Pyrolysis: Measurement Method Comparison and Radiative Implications".ENVIRONMENTAL SCIENCE & TECHNOLOGY 54(2020).