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| Titel |
Why does surface ozone peak before a typhoon landing in southeast China? |
| VerfasserIn |
Y. C. Jiang, T. L. Zhao, J. Liu, X. D. Xu, C. H. Tan, X. H. Cheng, X. Y. Bi, J. B. Gan, J. F. You, S. Z. Zhao |
| 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. 23 ; Nr. 15, no. 23 (2015-12-02), S.13331-13338 |
| Datensatznummer |
250120198
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| Publikation (Nr.) |
 copernicus.org/acp-15-13331-2015.pdf |
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| Zusammenfassung |
| A high O3 episode with the large increases in surface ozone by
21–42 ppbv and the nocturnal surface O3 levels exceeding 70 ppbv was
observed in the region between Xiamen and Quanzhou over the southeastern
coast of China during 12–14 June 2014, before the Typhoon Hagibis landing.
Variations in the surface O3, NO2, CO and meteorology during the
Typhoon Hagibis event clearly suggest a substantial impact of the peripheral
downdrafts in the large-scale typhoon circulation on such an O3 episode
excluding the contributions of photochemical production and the horizontal
transport. The influence of vertical O3 transport from the upper
troposphere and lower stratosphere (UTLS) region on high surface O3
levels is further confirmed by a negative correlation between surface O3
and CO concentrations as well as dry surface air observed during the O3
episode. This study provides observational evidence of typhoon-driven
intrusion of O3 from the UTLS region to surface air, revealing a
significant effect of such a process of stratosphere–troposphere exchange
(STE) of O3 on tropospheric O3 and ambient air quality. |
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