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| Titel |
Characteristics of 1 year of observational data of VOCs, NOx and O3 at a suburban site in Guangzhou, China |
| VerfasserIn |
Y. Zou, X. J. Deng, D. Zhu, D. C. Gong, H. Wang, F. Li, H. B. Tan, T. Deng, B. R. Mai, X. T. Liu, B. G. Wang |
| 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 ; 15, no. 12 ; Nr. 15, no. 12 (2015-06-16), S.6625-6636 |
| Datensatznummer |
250119830
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| Publikation (Nr.) |
 copernicus.org/acp-15-6625-2015.pdf |
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| Zusammenfassung |
| Guangzhou, one of China's megacities, is beset with frequent occurrence of
high-concentration ozone events. In this study, online instruments were used
to simultaneously monitor ozone, nitrogen oxides (NOx) and volatile
organic compounds (VOCs) at GPACS (the Guangzhou Panyu Atmospheric
Composition Station) of the China Meteorological Administration, from June 2011 to May 2012, in order to determine their characteristics, the effect of
VOCs on ozone photochemical production and the relationship between
VOC / NOx ratio and ozone formation. The results showed that during the
observation period, the seasonal variation of ozone concentration was lower
in spring and winter compared to summer and autumn, which is opposite
that for VOCs and NOx. In terms of VOCs, aromatics had the largest
ozone formation potential, among which toluene, xylenes, ethylbenzene,
1,2,4-trimethylbenzene and 1,3,5-trimethylbenzene were the most important
species, with a total contribution of about 44%. As the VOC / NOx
ratios were very high during high-concentration ozone events that occur all
year round, we speculate ozone production was likely to be NOx-limited
regime (12:00–16:00 LT) in Guangzhou. Further investigation based on
numerical models is needed in the future to obtain more detailed and
robust conclusions. |
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