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| Titel |
Tropospheric ozone trend over Beijing from 2002–2010: ozonesonde measurements and modeling analysis |
| VerfasserIn |
Y. Wang, P. Konopka, Y. Liu, H. Chen, R. Müller, F. Plöger, M. Riese, Z. Cai, D. Lü |
| 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. 18 ; Nr. 12, no. 18 (2012-09-18), S.8389-8399 |
| Datensatznummer |
250011453
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| Publikation (Nr.) |
 copernicus.org/acp-12-8389-2012.pdf |
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| Zusammenfassung |
| Using a combination of ozonesonde data and numerical simulations of the
Chemical Lagrangian Model of the Stratosphere (CLaMS), the trend of
tropospheric ozone (O3) during 2002–2010 over Beijing was
investigated. Tropospheric ozone over Beijing shows a winter minimum and a
broad summer maximum with a clear positive trend in the maximum summer ozone
concentration over the last decade. The observed significant trend of
tropospheric column ozone is mainly caused by photochemical production
(3.1% yr−1 for a mean level of 52 DU). This trend is close to the
significant trend of partial column ozone in the lower troposphere (0–3 km)
resulting from the enhanced photochemical production during summer
(3.0% yr−1 for a mean level of 23 DU). Analysis of the CLaMS
simulation shows that transport rather than chemistry drives most of the
seasonality of tropospheric ozone. However, dynamical processes alone cannot
explain the trend of tropospheric ozone in the observational data. Clearly
enhanced ozone values and a negative vertical ozone gradient in the lower
troposphere in the observational data emphasize the importance of
photochemistry within the troposphere during spring and summer, and suggest
that the photochemistry within the troposphere significantly contributes to
the tropospheric ozone trend over Beijing during the last decade. |
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