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题名: Molecular markers of biomass burning, fungal spores and biogenic SOA in the Taklimakan desert aerosols
作者: Fu P. Q.; Zhuang, G. S.; Sun, Y. L.; Wang, Q. Z.; Chen, J.; Ren, L. J.; Yang, F.; Wang, Z. F.; Pan, X. L.; Li, X. D.; Kawamura, K.
出处: Atmospheric Environment
发表日期: 2016
卷: 130
页: 64-73
关键词: Biomass burning ; Fungal spore ; 2-Methyltetrols ; Asian dust ; Taklimakan ; desert ; secondary organic aerosol ; atmospheric particulate matter ; western north ; pacific ; asian dust ; emission factors ; mineral dust ; chemical-composition ; marine aerosols ; tracers ; isoprene
英文摘要: Biogenic primary organic aerosols (POA) and secondary organic aerosols (SOA) are important organic constituents of atmospheric particulate matter (PM). In order to better understand the atmospheric abundances, molecular compositions and sources of the desert aerosols, biomass-burning tracers (e.g. levoglucosan), primary saccharides including fungal spore tracers, and SOA tracers from the oxidation of biogenic volatile organic compounds (e.g. isoprene, monoterpenes and sesquiterpene) have been studied in ambient aerosols from the Taklimakan desert, using gas chromatography-mass spectrometry. Results showed that the total concentrations of biomass-burning tracers at Hetian (177-359 ng m(-3), mean 233 ng m(-3) in PM2.5) in the south rim of the desert were much higher than those at Tazhong (1.9-8.8 ng m(-3) in PM2.5 and 5.9-32 ng m(-3) in TSP) in the central Taklimakan desert. Molecular markers of fungal spores were also detected in all the desert aerosols, highlighting the importance of primary bioaerosols in the Asian dust particles. A specific pattern of the dominance of 2-methylglyceric acid over 2-methyltetrols and C-5-alkene triols was found in the Taklimakan desert aerosols, especially during the dust storm events, which is different from the 2-methyltetrols-dominated pattern in other ambient aerosols. Our results provide direct evidence on the biogenic POA and SOA tracers in the Taklimakan desert region, which help to better understand their impact on the aerosol chemistry in the down-wind regions. (C) 2015 Elsevier Ltd. All rights reserved.
收录类别: SCI
语种: 英语
ISSN号: 1352-2310
DOI标识: 10.1016/j.atmosenv.2015.10.087
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内容类型: SCI/SSCI论文
URI标识: http://ir.igsnrr.ac.cn/handle/311030/43454
Appears in Collections:历年回溯文献_SCI/SSCI论文

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Fu P. Q.,Zhuang, G. S.,Sun, Y. L.,et al. Molecular markers of biomass burning, fungal spores and biogenic SOA in the Taklimakan desert aerosols. 2016.
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