Characteristics of atmospheric volatile organic compounds (VOCs) at a mountainous forest site and two urban sites in the southeast of China

Volatile organic compounds (VOCs) are important trace gases in the atmosphere, affecting air quality (e.g. ozone and secondary organic aerosol formation) and human health. To understand the emission, transport and chemistry of VOCs in the southeast of China (Fujian Province), a campaign was conducte...

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Veröffentlicht in:The Science of the total environment 2019-03, Vol.657, p.1491-1500
Hauptverfasser: Hong, Zhenyu, Li, Mengze, Wang, Hong, Xu, Lingling, Hong, Youwei, Chen, Jinsheng, Chen, Junhuai, Zhang, Han, Zhang, Yanru, Wu, Xin, Hu, Baoye, Li, Mengren
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container_title The Science of the total environment
container_volume 657
creator Hong, Zhenyu
Li, Mengze
Wang, Hong
Xu, Lingling
Hong, Youwei
Chen, Jinsheng
Chen, Junhuai
Zhang, Han
Zhang, Yanru
Wu, Xin
Hu, Baoye
Li, Mengren
description Volatile organic compounds (VOCs) are important trace gases in the atmosphere, affecting air quality (e.g. ozone and secondary organic aerosol formation) and human health. To understand the emission, transport and chemistry of VOCs in the southeast of China (Fujian Province), a campaign was conducted in summer and winter of 2016 at three contrasting sites in close proximity. One measurement site (Mt. Wuyi) is a mountainous forest site (1139 m a.s.l.) located in a natural reserve, while the other two sites (Fuzhou, Xiamen) are coastal urban sites with high population and vehicle density. Comparison of VOCs at these three sites provides a valuable perspective on regional air pollution and transport. Many of the measured alkanes, alkenes and aromatics exhibited clear seasonal and diurnal patterns, driven by variations of hydroxyl (OH) radicals, which is the predominant oxidant of VOCs in the atmosphere. By examining tracer-tracer correlations for VOCs, variability-lifetime analysis and 36 h backward trajectories, strong emissions from vehicular exhaust, liquefied petroleum gas (LPG) and solvent usage were identified as key sources in Fuzhou and Xiamen, whereas at Mt. Wuyi the main emission sources were local emissions (e.g. biomass burning) in summer and long-range transport in winter. The results indicate that natural sites could be impacted strongly by surrounding urbanization. Isoprene and propylene in summer and propylene in winter contributed the most to ozone formation at the three sites. The data in this study provides a useful benchmark for future research on air quality monitoring and emission sources in the region. [Display omitted] •Comprehensive measurements of VOCs were conducted in southeastern China.•Seasonal and diurnal patterns of VOCs were driven by variations of OH radicals.•The VOCs of remote site were strongly influenced by anthropogenic sources in winter.•High targeted VOCs emissions in urban sites probably due to the widely use of LPG.
doi_str_mv 10.1016/j.scitotenv.2018.12.132
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By examining tracer-tracer correlations for VOCs, variability-lifetime analysis and 36 h backward trajectories, strong emissions from vehicular exhaust, liquefied petroleum gas (LPG) and solvent usage were identified as key sources in Fuzhou and Xiamen, whereas at Mt. Wuyi the main emission sources were local emissions (e.g. biomass burning) in summer and long-range transport in winter. The results indicate that natural sites could be impacted strongly by surrounding urbanization. Isoprene and propylene in summer and propylene in winter contributed the most to ozone formation at the three sites. The data in this study provides a useful benchmark for future research on air quality monitoring and emission sources in the region. [Display omitted] •Comprehensive measurements of VOCs were conducted in southeastern China.•Seasonal and diurnal patterns of VOCs were driven by variations of OH radicals.•The VOCs of remote site were strongly influenced by anthropogenic sources in winter.•High targeted VOCs emissions in urban sites probably due to the widely use of LPG.</description><identifier>ISSN: 0048-9697</identifier><identifier>EISSN: 1879-1026</identifier><identifier>DOI: 10.1016/j.scitotenv.2018.12.132</identifier><identifier>PMID: 30677915</identifier><language>eng</language><publisher>Netherlands: Elsevier B.V</publisher><subject>Mountainous forest areas ; Ozone formation potential ; Source profiles ; Volatile organic compounds (VOCs)</subject><ispartof>The Science of the total environment, 2019-03, Vol.657, p.1491-1500</ispartof><rights>2018 Elsevier B.V.</rights><rights>Copyright © 2018 Elsevier B.V. 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By examining tracer-tracer correlations for VOCs, variability-lifetime analysis and 36 h backward trajectories, strong emissions from vehicular exhaust, liquefied petroleum gas (LPG) and solvent usage were identified as key sources in Fuzhou and Xiamen, whereas at Mt. Wuyi the main emission sources were local emissions (e.g. biomass burning) in summer and long-range transport in winter. The results indicate that natural sites could be impacted strongly by surrounding urbanization. Isoprene and propylene in summer and propylene in winter contributed the most to ozone formation at the three sites. The data in this study provides a useful benchmark for future research on air quality monitoring and emission sources in the region. 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By examining tracer-tracer correlations for VOCs, variability-lifetime analysis and 36 h backward trajectories, strong emissions from vehicular exhaust, liquefied petroleum gas (LPG) and solvent usage were identified as key sources in Fuzhou and Xiamen, whereas at Mt. Wuyi the main emission sources were local emissions (e.g. biomass burning) in summer and long-range transport in winter. The results indicate that natural sites could be impacted strongly by surrounding urbanization. Isoprene and propylene in summer and propylene in winter contributed the most to ozone formation at the three sites. The data in this study provides a useful benchmark for future research on air quality monitoring and emission sources in the region. 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subjects Mountainous forest areas
Ozone formation potential
Source profiles
Volatile organic compounds (VOCs)
title Characteristics of atmospheric volatile organic compounds (VOCs) at a mountainous forest site and two urban sites in the southeast of China
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