气候变化领域集成服务门户(CCPortal): Concentrations and light absorption characteristics of carbonaceous aerosol in PM2.5 and PM10 of Lhasa city, the Tibetan Plateau

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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
	Li, Chaoliu; Chen, Pengfei; Kang, Shichang; Yan, Fangping; Hu, Zhaofu; Qu, Bin; Sillanpaa, Mika
发表日期	2016
ISSN	1352-2310
EISSN	1873-2844
卷号	127
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.
关键词	Carbonaceous aerosol Light absorption Black carbon Lhasa The Tibetan Plateau
学科领域	Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences ; Meteorology & Atmospheric Sciences
来源期刊	ATMOSPHERIC ENVIRONMENT
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111855
作者单位	Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Li, Chaoliu,Chen, Pengfei,Kang, Shichang,et al. Concentrations and light absorption characteristics of carbonaceous aerosol in PM2.5 and PM10 of Lhasa city, the Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2016,127.
APA	Li, Chaoliu.,Chen, Pengfei.,Kang, Shichang.,Yan, Fangping.,Hu, Zhaofu.,...&Sillanpaa, Mika.(2016).Concentrations and light absorption characteristics of carbonaceous aerosol in PM2.5 and PM10 of Lhasa city, the Tibetan Plateau.ATMOSPHERIC ENVIRONMENT,127.
MLA	Li, Chaoliu,et al."Concentrations and light absorption characteristics of carbonaceous aerosol in PM2.5 and PM10 of Lhasa city, the Tibetan Plateau".ATMOSPHERIC ENVIRONMENT 127(2016).