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| Titel |
Ozone production in summer in the megacities of Tianjin and Shanghai, China: a comparative study |
| VerfasserIn |
L. Ran, C. S. Zhao, W. Y. Xu, M. Han, X. Q. Lu, S. Q. Han, W. L. Lin, X. B. Xu, W. Gao, Q. Yu, F. H. Geng, N. Ma, Z. Z. Deng, J. 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 ; 12, no. 16 ; Nr. 12, no. 16 (2012-08-17), S.7531-7542 |
| Datensatznummer |
250011401
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| Publikation (Nr.) |
 copernicus.org/acp-12-7531-2012.pdf |
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| Zusammenfassung |
| Rapid economic growth has given rise to a significant increase in ozone
precursor emissions in many regions of China, especially in the densely
populated North China Plain (NCP) and Yangtze River Delta (YRD). Improved
understanding of ozone formation in response to different precursor
emissions is imperative to address the highly nonlinear ozone problem and to
provide a solid scientific basis for efficient ozone abatement in these
regions. A comparative study on ozone photochemical production in summer has
thus been carried out in the megacities of Tianjin (NCP) and Shanghai (YRD).
Two intensive field campaigns were carried out respectively at an urban and
a suburban site of Tianjin, in addition to routine monitoring of trace gases
in Shanghai, providing data sets of surface ozone and its precursors
including nitrogen oxides (NOx) and various non-methane hydrocarbons
(NMHCs). Ozone pollution in summer was found to be more severe in the
Tianjin region than in the Shanghai region, based on either the frequency or
the duration of high ozone events. Such differences might be attributed to
the large amount of highly reactive NMHCs in Tianjin. Industry related
species like light alkenes were of particular importance in both urban and
suburban Tianjin, while in Shanghai aromatics dominated. In general, the
ozone problem in Shanghai is on an urban scale. Stringent control policies
on local emissions would help reduce the occurrence of high ozone
concentrations. By contrast, ozone pollution in Tianjin is probably a
regional problem. Combined efforts to reduce ozone precursor emissions on a
regional scale must be undertaken to bring the ozone problem under control. |
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