Brown carbon aerosol in two megacities in the Sichuan Basin of southwestern China: Light absorption properties and implications

doi:10.1016/j.scitotenv.2020.137483

	Brown carbon aerosol in two megacities in the Sichuan Basin of southwestern China: Light absorption properties and implications
	Peng, Chao 1,2; Yang, Fumo 1,2,3; Tian, Mi 4; Shi, Guangming 3; Li, Li 8; Huang, Ru-Jin 5; Yao, Xiaojiang 1; Luo, Bin 7; Zhai, Chongzhi 6; Chen, Yang 1
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2020-06-01
卷号	719 页码:11
关键词	Brown carbon Pollution period Aged BrC Biomass burning Sichuan Basin
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2020.137483
通讯作者	Yang, Fumo(fmyang@scu.edu.cn) ; Chen, Yang(chenyang@cigit.ac.cn)
英文摘要	The light absorption of brown carbon (BrC) makes a significant contribution to aerosol light absorption (Abs) and affects the radiative forcing. In this study, we analyzed and evaluated the light absorption and radiative forcing of BrC samples collected from December 2016 to January 2017 in Chongqing and Chengdu in the Sichuan Basin of Southwest China. Based on a two-component model, we estimated that BrC light absorption at 405 nm was 19.9 +/- 17.1 Mm(-1) and 19.2 = 12.3 Mm(-1) in Chongqing and Chengdu, contributing 19.0 +/- 5.0% and 17.8 3.7% to Abs respectively. Higher Abs(405,BrC), MAE(405.Br)(C), and AAE(405-980) values were observed during the pollution period over the dean period in both cities. The major sources of BrC were biomass burning (BB) and secondary organic aerosol in Chongqing, and coal combustion (CC) and secondary organic aerosol in Chengdu. During the pollution period, aged BrC formed from anthropogenic precursors via its aqueous reactions with NH4+ and NOx had impacts on BrC absorption in both cities. BB led to higher AbS(405,BrC), MAE(405,BrC), and AAE(405-980) values in Chongqing than Chengdu during the pollution period. The fractional contribution of radiation absorbed by BrC relative to BC in the wavelengths of 405-445 nm was 60.2 +/- 17.0% and 64.2 +/- 11.6% in Chongqing and Chengdu, significantly higher than that in the range 01405-980 nm (262 +/- 6.7% and 27.7 +/- 4.6% respectively) (p 0.001). This study is useful for understanding the characterization, sources, and impacts of BrC in the Sichuan Basin. (C) 2020 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[41875162] ; National Natural Science Foundation of China[41773148] ; National Natural Science Foundation of China[41403089] ; National Natural Science Foundation of China[41375123] ; National Natural Science Foundation of China[81571130100] ; National Key Research and Development Program of China[2016YFC0200405] ; National Key Research and Development Program of China[2018YFC0214001] ; Sichuan Science and Technology Program[2018SZDZX0023]
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000521936300025
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/10749]
专题	中国科学院重庆绿色智能技术研究院
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.Sichuan Univ, Coll Architecture & Environm, Natl Engn Res Ctr Flue Gas Desulfurizat, Chengdu 610065, Peoples R China 4.Chongqing Univ, Sch Environm & Ecol, Chongqing 400044, Peoples R China 5.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Key Lab Aerosol Chem & Phys, Xian 710075, Peoples R China 6.Chongqing Acad Environm Sci, Chongqing 401147, Peoples R China 7.Sichuan Environm Monitoring Ctr, Chengdu 610041, Peoples R China 8.Chongqing Univ Arts & Sci, Coll Chem & Environm Engn, Chongqing 402160, Peoples R China
推荐引用方式 GB/T 7714	Peng, Chao,Yang, Fumo,Tian, Mi,et al. Brown carbon aerosol in two megacities in the Sichuan Basin of southwestern China: Light absorption properties and implications[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,719:11.
APA	Peng, Chao.,Yang, Fumo.,Tian, Mi.,Shi, Guangming.,Li, Li.,...&Chen, Yang.(2020).Brown carbon aerosol in two megacities in the Sichuan Basin of southwestern China: Light absorption properties and implications.SCIENCE OF THE TOTAL ENVIRONMENT,719,11.
MLA	Peng, Chao,et al."Brown carbon aerosol in two megacities in the Sichuan Basin of southwestern China: Light absorption properties and implications".SCIENCE OF THE TOTAL ENVIRONMENT 719(2020):11.