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Spatial distribution and sources of winter black carbon and brown carbon in six Chinese megacities
Zhang, Qian1,2; Shen, Zhenxing2,3,9; Zhang, Tian2; Kong, Shaofei4; Lei, Yali2; Wang, Qiyuan3; Tao, Jun5; Zhang, Renjian6; Wei, Peng7; Wei, Chong8; Cui, Song9; Cheng, Tiantao10; Ho, Steven Sai Hang11; Li, Ziyi1; Xu, Hongmei2; Cao, Junji3
Corresponding AuthorShen, Zhenxing(zxshen@mail.xjtu.edu.cn)
2021-03-25
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume762Pages:12
AbstractThe 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.
KeywordBlack carbon Brown carbon Light absorption Source Formation mechanism GAM model
DOI10.1016/j.scitotenv.2020.143075
WOS KeywordREGIONAL TRANSPORT ; OPTICAL-PROPERTIES ; SOURCE APPORTIONMENT ; PARTICULATE MATTER ; LIGHT-ABSORPTION ; ATMOSPHERIC PARTICLES ; GUANZHONG PLAIN ; SOURCE PROFILES ; HAZE POLLUTION ; ORGANIC-CARBON
Indexed BySCI ; SCI
Language英语
Funding ProjectNational 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 Research AreaEnvironmental Sciences & Ecology
Funding OrganizationNational 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 SubjectEnvironmental Sciences
WOS IDWOS:000607910300013
PublisherELSEVIER
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/15874
Collection粉尘与环境研究室
Corresponding AuthorShen, Zhenxing
Affiliation1.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
Recommended Citation
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.
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