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Atmospheric oxalic acid and related secondary organic aerosols inQinghai Lake, a continental background site in Tibet Plateau
Meng, JJ (Meng, Jingjing)[ 1 ]; Wang, GH (Wang, Gehui)[ 1,2 ]; Li, JJ (Li, Jianjun)[ 1 ]; Cheng, CL (Cheng, Chunlei)[ 1 ]; Cao, JJ (Cao, Junji)[ 1 ]
2013-11-30
Source PublicationAtmospheric Environment
Volume79Pages:582-589
Subtype期刊论文
Abstract

Summertime PM2.5 aerosols collected from Qinghai Lake (3200ma.s.l.), a remote continental site in the northeastern part of Tibetan Plateau, were analyzed for dicarboxylic acids (C2-C11), ketocarboxylic acids and α-dicarbonyals. Oxalic acid (C2) is the dominant dicarboxylic acid in the samples, followed by malonic, succinic and azelaic acids. Total dicarboxylic acids (231±119ngm-3), ketocarboxylic acids (8.4±4.3ngm-3), and α-dicarbonyls (2.7±2.1ngm-3) at the Tibetan background site are 2-5 times less than those detected in lowland areas such as 14 Chinese megacities. Compared to those in other urban and marine areas enhancements in relative abundances of C2/total diacids and diacids-C/WSOC of the PM2.5 samples suggest that organic aerosols in the region are more oxidized due to strong solar radiation. Molecular compositions and air mass trajectories demonstrate that the above secondary organic aerosols in the Qinghai Lake atmosphere are largely derived from long-range transport. Ratios of oxalic acid, glyoxal and methylglyoxal to levoglucosan in PM2.5 aerosols emitted from household burning of yak dung, a major energy source for Tibetan in the region, are 30-400 times lower than those in the ambient air, which further indicates that primary emission from biomass burning is a negligible source of atmospheric oxalic acid and α-dicarbonyls at this background site.

KeywordOxalic Acid Secondary Organic Aerosols Pm2.5 Qinghai Lake Tibet Plateau
DOI10.1016/j.partic.2012.04.006
Indexed BySCI ; EI
Language英语
Citation statistics
Cited Times:40[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9974
Collection粉尘与环境研究室
Corresponding AuthorWang, GH (Wang, Gehui)[ 1,2 ]
Affiliation1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China;
2.School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Recommended Citation
GB/T 7714
Meng, JJ ,Wang, GH ,Li, JJ ,et al. Atmospheric oxalic acid and related secondary organic aerosols inQinghai Lake, a continental background site in Tibet Plateau[J]. Atmospheric Environment,2013,79:582-589.
APA Meng, JJ ,Wang, GH ,Li, JJ ,Cheng, CL ,&Cao, JJ .(2013).Atmospheric oxalic acid and related secondary organic aerosols inQinghai Lake, a continental background site in Tibet Plateau.Atmospheric Environment,79,582-589.
MLA Meng, JJ ,et al."Atmospheric oxalic acid and related secondary organic aerosols inQinghai Lake, a continental background site in Tibet Plateau".Atmospheric Environment 79(2013):582-589.
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