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学科主题: 地理学::自然地理学
题名: Concentrations and light absorption characteristics of carbonaceous aerosol in PM2.5 and PM10 of Lhasa city, the Tibetan Plateau
作者: Li, CL (Li, Chaoliu)1; Chen, PF (Chen, Pengfei)1, 2; Kang, SC (Kang, Shichang)3, 4; Yan, FP (Yan, Fangping)2, 3; Hu, ZF (Hu, Zhaofu)2, 3; Qu, B (Qu, Bin)5; Sillanpaa, M (Sillanpaa, Mika)5
通讯作者: Li, CL
刊名: ATMOSPHERIC ENVIRONMENT
发表日期: 2016
DOI: 10.1016/j.atmosenv.2015.12.059
卷: 127, 期:0, 页:340-346
收录类别: SCI
合作性质: 国际
文章类型: 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.
语种: 英语
WOS记录号: WOS:000370770700037
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7764
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China
4.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
5.Lappeenranta Univ Technol, Lab Green Chem, Sammonkatu 12, FIN-50130 Mikkeli, Finland

Recommended Citation:
Li, CL ,Chen, PF ,Kang, SC ,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.
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格式: Adobe PDF
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