Spatial distribution and sources of winter black carbon and brown carbon in six Chinese megacities

doi:10.1016/j.scitotenv.2020.143075

IEECAS OpenIR > 粉尘与环境研究室

	Spatial distribution and sources of winter black carbon and brown carbon in six Chinese megacities
	Zhang, Qian 1,2; Shen, Zhenxing 2,3,9; Zhang, Tian 2; Kong, Shaofei 4; Lei, Yali 2; Wang, Qiyuan 3; Tao, Jun 5; Zhang, Renjian 6; Wei, Peng 7; Wei, Chong 8; Cui, Song 9; Cheng, Tiantao 10; Ho, Steven Sai Hang 11; Li, Ziyi 1; Xu, Hongmei 2; Cao, Junji 3
通讯作者	Shen, Zhenxing(zxshen@mail.xjtu.edu.cn)
	2021-03-25
发表期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
卷号	762 页码:12
摘要	The light-absorbing carbonaceous aerosols, including black carbon (BC) and brown carbon (BrC), influenced heavily on aerosol environmental quality and the Earth's radiation. Here, a winter campaign to characterize BC and BrC in PM2.5 was conducted simultaneously in six Chinese megacities (i.e., Harbin, Beijing, Xi'an, Shanghai, Wuhan, and Guangzhou) using continual aethalometers. The combinations of advanced aethalometer and generalized additive model (GAM) were used to precisely quantify the BC and BrC sources in these megacities. The averaged light-absorbing coefficients of BC (b(abs)-BC) and BrC (b(abs)-BrC) were 28.6 and 21.8 Mm(-1) in northern cities, they were 1.4 and 2.7 times higher than those in southern cities. The BrC dominated the total b(abs) (>40%) in northern cities but low to 20% in southern cities. On the other hand, the BC fractions were high in the southern cities, with the contributions of 62.4-79.7%, where as much lower values of 53.7-59.4% in the northern cities. Source apportionment showed that the combustion of liquid fuels (e.g., gasoline or diesel) was highly dominant to b(abs)-BC (>80%) in Guangzhou and Wuhan. This was further supported by the high NO2 loadings in the GAM model. Solid fuels (i.e., biomass or coal) contributed a substantial portion to total b(abs)-BC in the other four cities where the high abundances of primary b(abs)-BrC were observed. The diurnal trend showed the peaks of secondary-BrC (b(abs)-BrCS) and b(abs)-BrCS/Delta CO in the northern cities occurred at high relative humidity in nighttime, implying the secondary BrC formation was possibly related to aqueous reactions in winter. In contrast, in the southern cities of Shanghai and Guangzhou, the accumulation of vehicle emissions during the morning traffic rush hours lead the formation of secondary BrC through photochemical reactions. The results of this work can be applied for the development of more effective practices to control BC and BrC on regional scale. (C) 2020 Elsevier B.V. All rights reserved.
关键词	Black carbon Brown carbon Light absorption Source Formation mechanism GAM model
DOI	10.1016/j.scitotenv.2020.143075
关键词[WOS]	REGIONAL TRANSPORT ; OPTICAL-PROPERTIES ; SOURCE APPORTIONMENT ; PARTICULATE MATTER ; LIGHT-ABSORPTION ; ATMOSPHERIC PARTICLES ; GUANZHONG PLAIN ; SOURCE PROFILES ; HAZE POLLUTION ; ORGANIC-CARBON
收录类别	SCI ; SCI
语种	英语
资助项目	National Natural Science Foundation of China[41877383] ; National Natural Science Foundation of China[41877376] ; National Natural Science Foundation of China[21661132005] ; Key Research and Development Programof Shaanxi Province[2018-ZDXM3-01] ; Scientific Research Plan Projects of Shaanxi Education Department[19JK0453] ; Young Talent Support Programof Shaanxi Province University[20190703]
WOS研究方向	Environmental Sciences & Ecology
项目资助者	National Natural Science Foundation of China ; Key Research and Development Programof Shaanxi Province ; Scientific Research Plan Projects of Shaanxi Education Department ; Young Talent Support Programof Shaanxi Province University
WOS类目	Environmental Sciences
WOS记录号	WOS:000607910300013
出版者	ELSEVIER
引用统计	被引频次：33[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/361006/15874
专题	粉尘与环境研究室
通讯作者	Shen, Zhenxing
作者单位	1.Xian Univ Architecture & Technol, Key Lab Northwest Resource Environm & Ecol, MOE, Xian 710055, Peoples R China 2.Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian 710049, Peoples R China 3.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, SKLLQG, Xian, Peoples R China 4.China Univ Geosci, Sch Environm Sci, Dept Atmospher Sci, Wuhan 430074, Peoples R China 5.Minist Environm Protect, South China Inst Environm Sci, Guangzhou, Peoples R China 6.Chinese Acad Sci, Inst Atmospher Phys, Key Lab Middle Atmosphere & Global Environm Obser, Beijing 100029, Peoples R China 7.Hong Kong Univ Sci & Technol, Div Environm & Sustainabil, Hong Kong, Peoples R China 8.Chinese Acad Sci, Shanghai Carbon Data Res Ctr, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China 9.Northeast Agr Univ, Int Joint Res Ctr Persistent Tox Subst IJRC PTS, Sch Water Conservancy & Civil Engn, Harbin, Peoples R China 10.Fudan Univ, Sch Atmospher Sci, Shanghai, Peoples R China 11.Desert Res Inst, Div Atmospher Sci, Reno, NV 89512 USA
推荐引用方式 GB/T 7714	Zhang, Qian,Shen, Zhenxing,Zhang, Tian,et al. Spatial distribution and sources of winter black carbon and brown carbon in six Chinese megacities[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,762:12.
APA	Zhang, Qian.,Shen, Zhenxing.,Zhang, Tian.,Kong, Shaofei.,Lei, Yali.,...&Cao, Junji.(2021).Spatial distribution and sources of winter black carbon and brown carbon in six Chinese megacities.SCIENCE OF THE TOTAL ENVIRONMENT,762,12.
MLA	Zhang, Qian,et al."Spatial distribution and sources of winter black carbon and brown carbon in six Chinese megacities".SCIENCE OF THE TOTAL ENVIRONMENT 762(2021):12.