Light absorption of brown carbon in PM2.5 in the Three Gorges Reservoir region, southwestern China: Implications of biomass burning and secondary formation

doi:10.1016/j.atmosenv.2020.117409

IEECAS OpenIR > 粉尘与环境研究室

	Light absorption of brown carbon in PM2.5 in the Three Gorges Reservoir region, southwestern China: Implications of biomass burning and secondary formation
	Peng, Chao 1,2; Tian, Mi 1,5; Wang, Xiaoliang 3; Yang, Fumo 1,4; Shi, Guangming 1,4; Huang, Ru-Jin 6; Yao, Xiaojiang 1; Wang, Qiyuan 6; Zhai, Chongzhi 7; Zhang, Shumin 8; Qian, Ruozhi 1; Cao, Junji 6; Chen, Yang 1
通讯作者	Yang, Fumo(fmyang@scu.edu.cn) ; Chen, Yang(chenyang@cigit.ac.cn)
	2020-05-15
发表期刊	ATMOSPHERIC ENVIRONMENT
ISSN	1352-2310
卷号	229 页码:12
摘要	Brown carbon (BrC) is known as a light-absorbing organic aerosol which affects the visibility and radiative forcing budget in the troposphere. The optical properties were studied for filter-based PM2.5 samples collected from the winter of 2015 to the summer of 2016 at one rural and three urban sites in the Three Gorges Reservoir (TGR) region, China. The average light absorption coefficient for BrC (beta(abs,405, BrC)) at 405 nm and its contributions to total aerosol light absorption during winter were 12.1 +/- 7.0 Mm(-1) and 23.8 +/- 9.1% respectively, higher than those during summer (1.7 +/- 0.8 Mm(-1) and 11.2 +/- 4.1%). Spatially, the average beta(abs,405, BrC) was higher at the urban sites (13.4 +/- 7.3 Mm(-1)) than that at the rural site (7.8 +/- 3.2 Mm(-1)). The average mass absorption efficiency of BrC at 405 nm (MAE(405),(BrC)) was 0.8 +/- 0.4 m(2) g(-1) during winter which was 2.7 times higher than that during summer (0.3 +/- 0.1 m(2) g(-1)). Furthermore, the absorption Angstrom exponents (AAE) at 405-980 nm (AAE(405-980)) were 1.1 +/- 0.1 in summer and 1.3 +/- 0.2 in winter respectively. Correlation analysis suggests that biomass burning (BB) played an important role in beta(abs,405, BrC) during winter. Additionally, the relatively high AAE(405_980) during winter was mainly due to the BrC from both BB and secondary organic aerosol. The fractional contribution of solar energy absorption by BrC relative to BC in the wavelengths of 405-445 nm was 23.9 +/- 7.8% in summer and 63.7 +/- 14.2% in winter, significantly higher than that in the range of 405-980 nm (11.9 +/- 3.4% and 29.9 +/- 6.1% respectively). Overall, this study contributes to the understanding of sources of BrC in the climate-sensitive TGR region of southwestern China.
关键词	Brown carbon Light absorption Biomass burning Three gorges reservoir
DOI	10.1016/j.atmosenv.2020.117409
关键词[WOS]	SOLUBLE ORGANIC-CARBON ; PEARL RIVER DELTA ; SOURCE APPORTIONMENT ; BLACK CARBON ; CHEMICAL CHARACTERISTICS ; ELEMENTAL CARBON ; SICHUAN BASIN ; FORMATION MECHANISMS ; SPECTRAL DEPENDENCE ; ANGSTROM EXPONENT
收录类别	SCI ; SCI
语种	英语
资助项目	National Key Research and Development Program of China[2016YFC0200405] ; National Key Research and Development Program of China[2018YFC0200402] ; National Natural Science Foundation of China[41375123] ; National Natural Science Foundation of China[81571130100]
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
项目资助者	National Key Research and Development Program of China ; National Natural Science Foundation of China
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000530031600002
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：18[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/361006/14758
专题	粉尘与环境研究室
通讯作者	Yang, Fumo; Chen, Yang
作者单位	1.Chinese Acad Sci, Res Ctr Atmospher Environm, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Desert Res Inst, Div Atmospher Sci, Reno, NV USA 4.Sichuan Univ, Coll Architecture & Environm, Natl Engn Res Ctr Flue Gas Desulfurizat, Chengdu 610065, Peoples R China 5.Chongqing Univ, Sch Environm & Ecol, Chongqing 400044, Peoples R China 6.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Key Lab Aerosol Chem & Phys, Xian 710075, Peoples R China 7.Chongqing Acad Environm Sci, Chongqing 401147, Peoples R China 8.North Sichuan Med Coll, Sch Basic Med Sci, Nanchong 637000, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Peng, Chao,Tian, Mi,Wang, Xiaoliang,et al. Light absorption of brown carbon in PM2.5 in the Three Gorges Reservoir region, southwestern China: Implications of biomass burning and secondary formation[J]. ATMOSPHERIC ENVIRONMENT,2020,229:12.
APA	Peng, Chao.,Tian, Mi.,Wang, Xiaoliang.,Yang, Fumo.,Shi, Guangming.,...&Chen, Yang.(2020).Light absorption of brown carbon in PM2.5 in the Three Gorges Reservoir region, southwestern China: Implications of biomass burning and secondary formation.ATMOSPHERIC ENVIRONMENT,229,12.
MLA	Peng, Chao,et al."Light absorption of brown carbon in PM2.5 in the Three Gorges Reservoir region, southwestern China: Implications of biomass burning and secondary formation".ATMOSPHERIC ENVIRONMENT 229(2020):12.