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| Titel |
Volatile Organic Compound (VOC) measurements in the Pearl River Delta (PRD) region, China |
| VerfasserIn |
Ying Liu, Min Shao, Sihua Lu, Chih-Chung Chang, Jia-Lin Wang, Gao Chen |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 8, no. 6 ; Nr. 8, no. 6 (2008-03-13), S.1531-1545 |
| Datensatznummer |
250005922
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| Publikation (Nr.) |
 copernicus.org/acp-8-1531-2008.pdf |
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| Zusammenfassung |
| We measured levels of ambient volatile organic compounds (VOCs) at seven
sites in the Pearl River Delta (PRD) region of China during the Air Quality
Monitoring Campaign spanning 4 October to 3 November 2004. Two of the
sites, Guangzhou (GZ) and Xinken (XK), were intensive sites at which we
collected multiple daily canister samples. The observations reported here
provide a look at the VOC distribution, speciation, and photochemical
implications in the PRD region. Alkanes constituted the largest percentage
(>40%) in mixing ratios of the quantified VOCs at six sites; the
exception was one major industrial site that was dominated by aromatics
(about 52%). Highly elevated VOC levels occurred at GZ during two
pollution episodes; however, the chemical composition of VOCs did not
exhibit noticeable changes during these episodes. We calculated the OH loss
rate to estimate the chemical reactivity of all VOCs. Of the anthropogenic
VOCs, alkenes played a predominant role in VOC reactivity at GZ, whereas the
contributions of reactive aromatics were more important at XK. Our
preliminary analysis of the VOC correlations suggests that the ambient VOCs
at GZ came directly from local sources (i.e., automobiles); those at XK were
influenced by both local emissions and transportation of air mass from
upwind areas. |
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