Concentrations and light absorption characteristics of carbonaceous aerosol in PM2.5 and PM10 of Lhasa city, the Tibetan Plateau

doi:10.1016/j.atmosenv.2015.12.059

	Concentrations and light absorption characteristics of carbonaceous aerosol in PM2.5 and PM10 of Lhasa city, the Tibetan Plateau
	Yan, FP (Yan, Fangping)4,5; Li, CL (Li, Chaoliu)3; Chen, PF (Chen, Pengfei)3,4; Kang, SC (Kang, Shichang)1,5; Hu, ZF (Hu, Zhaofu)4,5; Qu, B (Qu, Bin)2; Sillanpaa, M (Sillanpaa, Mika)2; Li, CL
刊名	ATMOSPHERIC ENVIRONMENT
	2016
卷号	127 期号:0 页码:340-346
关键词	Soluble Organic-carbon Elemental Carbon Black Carbon Optical-properties Chemical Characteristics Source Apportionment Brown Carbon China Combustion Winter
DOI	10.1016/j.atmosenv.2015.12.059
文献子类	Article
英文摘要	Light absorption properties of carbonaceous aerosol strongly influence the Earth's radiative balance, yet the related knowledge is limited for the Tibetan Plateau (TP), the highest and largest plateau in the world. In this study, organic carbon (OC), elemental carbon (EC) and water soluble organic carbon (WSOC) of PM2.5 and PM10 of Lhasa collected from May 2013 to March 2014 were studied. It showed that daily average concentrations of OC, EC and WSOC of PM2.5 and PM10 were lower than those of other mega cities. Lhasa PM2.5 was characterized by low OCJEC ratio (1.46 +/- 0.55), which was similar to that of Lhasa roadside PM2.5 (1.25 +/- 0.45), reflecting mainly direct influence of primary emissions and less secondary formation. Hence, although Lhasa atmosphere is relatively clean, it is intensively influenced by local vehicle emissions. Mass absorption cross-section of EC (MAC(EC)) for both PM2.5 and PM10 at 632 nm were 7.19 +/- 1.19 m(2) g(-1) and 7.98 +/- 2.32 m(2) g(-1), respectively, both of which had similar variation patterns to OC/EC and secondary OC (SOC)/OC, indicating that the increase of MAC(EC) might be caused by coating with organic aerosol. Additionally, the loading of EC for both PM2.5 and PM10 showed logarithmic relationships with those of optical attenuation (ATN) of EC, implying that the shadowing effect enhanced logarithmic with increased EC concentration. MAC of WSOC at 365 nm for PM2.5 (0.74 +/- 0.22 m(2) g(-1)) and PM10 (0.78 +/- 0.21 m(2) g(-1)) were also close to reported values of other cities mainly influenced by fossil combustion. Additionally, attenuation at 365 nm of WSOC of both PM2.5 and PM10 showed the same relationship with their WSOC concentrations, implying no difference for light absorption properties of WSOC for these two grain sizes. (C) 2015 Elsevier Ltd. All rights reserved.
学科主题	自然地理学
语种	英语
WOS记录号	WOS:000370770700037
内容类型	期刊论文
源URL	[http://ir.itpcas.ac.cn/handle/131C11/7764]
专题	青藏高原研究所_图书馆
通讯作者	Li, CL
作者单位	1.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 2.Lappeenranta Univ Technol, Lab Green Chem, Sammonkatu 12, FIN-50130 Mikkeli, Finland 3.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Yan, FP ,Li, CL ,Chen, PF ,et al. Concentrations and light absorption characteristics of carbonaceous aerosol in PM2.5 and PM10 of Lhasa city, the Tibetan Plateau[J]. ATMOSPHERIC ENVIRONMENT,2016,127(0):340-346.
APA	Yan, FP .,Li, CL .,Chen, PF .,Kang, SC .,Hu, ZF .,...&Li, CL.(2016).Concentrations and light absorption characteristics of carbonaceous aerosol in PM2.5 and PM10 of Lhasa city, the Tibetan Plateau.ATMOSPHERIC ENVIRONMENT,127(0),340-346.
MLA	Yan, FP ,et al."Concentrations and light absorption characteristics of carbonaceous aerosol in PM2.5 and PM10 of Lhasa city, the Tibetan Plateau".ATMOSPHERIC ENVIRONMENT 127.0(2016):340-346.