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Abundance, composition and source of atmospheric PM2.5 at a remote site in the Tibetan Plateau, China
Li, JJ (Li, Jian Jun)[ 1 ]; Wang, GH (Wang, Ge Hui)[ 1 ]; Wang, XM (Wang, Xin Ming)[ 2 ]; Cao, JJ (Cao, Jun Ji)[ 1 ]; Sun, T (Sun, Tao)[ 1 ]; Cheng, CL (Cheng, Chun Lei)[ 1 ]; Meng, JJ (Meng, Jing Jing)[ 1 ]; Hu, TF (Hu, Ta Feng)[ 1 ]; Liu, SX (Liu, Sui Xin)[ 1 ]
2013-09-16
发表期刊TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY
卷号65页码:20281
文章类型期刊论文
摘要

Two months of PM2.5 samples were collected during the summer of 2010 at Qinghai Lake (3200 m a.s.l.) in the northeastern part of the Tibetan Plateau, China and determined for organic compounds, elemental carbon, organic carbon (OC) and inorganic ions to explore the characteristics of aerosols in the continental atmosphere of China. Approximately 100 organic compounds in the samples were detected with an average of 61 perpendicular to 36 ng m(-3) in total, accounting for 2.6 +/- 1.0% of OC. n-Alkanes (19 +/- 12 ng m(-3)), fatty alcohols (12 +/- 7.6 ng m(-3)), polyols and polyacids (7.5 +/- 3.6 ng m(-3)), sugars (6.5 +/- 4.8 ng m(-3)), and biogenic secondary organic aerosols (BSOA) (6.3 +/- 4.4 ng m(-3)) are the major compounds in the samples, while phthalates (1.9 +/- 1.2 ng m(-3)), polycyclic aromatic hydrocarbons (PAHs) (0.7 perpendicular to 0.5 ng m(-3)) and phthalic acids (2.6 perpendicular to 1.5 ng m(-3)) are minor and one to three orders of magnitude lower than those in urban and rural regions over China. Our results showed that 2-methyltetrols in the PM2.5 samples, two key tracers for isoprene photo-oxidation, positively correlated with ambient temperature, which can be explained by enhancements in biogenic emission and photochemical oxidation when temperature increases. However, we also found that 2-methyltetrols in the samples negatively correlated with relative humidity (RH). Aerosol inorganic model (AIM) calculation showed that in situ acidity of the fine particles decreased along with an increase of RH, which results in a decrease in BSOA production due to acid-catalysed particle-phase reactions inefficient under higher RH conditions.

关键词Fine Particles Inorganic Ions Biogenic Secondary Organic Aerosols Relative Humidity
DOI10.3402/tellusb.v65i0.20281
收录类别SCI
语种英语
引用统计
被引频次:24[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/9935
专题粉尘与环境研究室
通讯作者Wang, GH (Wang, Ge Hui)[ 1 ]
作者单位1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, ChineseAcademy of Sciences, Xi’an 710075, China;
2.State Key Laboratory of Organic Geochemistry, Guangzhou Instituteof Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
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GB/T 7714
Li, JJ ,Wang, GH ,Wang, XM ,et al. Abundance, composition and source of atmospheric PM2.5 at a remote site in the Tibetan Plateau, China[J]. TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY,2013,65:20281.
APA Li, JJ .,Wang, GH .,Wang, XM .,Cao, JJ .,Sun, T .,...&Liu, SX .(2013).Abundance, composition and source of atmospheric PM2.5 at a remote site in the Tibetan Plateau, China.TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY,65,20281.
MLA Li, JJ ,et al."Abundance, composition and source of atmospheric PM2.5 at a remote site in the Tibetan Plateau, China".TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY 65(2013):20281.
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