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001     22838
005     20240712100827.0
024 7 _ |2 DOI
|a 10.5194/acp-12-8389-2012
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037 _ _ |a PreJuSER-22838
041 _ _ |a eng
082 _ _ |a 550
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|a Meteorology & Atmospheric Sciences
100 1 _ |0 P:(DE-Juel1)VDB19660
|a Wang, Y.
|b 0
|u FZJ
245 _ _ |a Tropospheric ozone trend over Beijing from 2001-2010: ozonesonde measurements and modeling analysis
260 _ _ |a Katlenburg-Lindau
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|c 2012
300 _ _ |a 8389 - 8399
336 7 _ |a Journal Article
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|a Atmospheric Chemistry and Physics
|v 12
|x 1680-7316
500 _ _ |3 POF3_Assignment on 2016-02-29
500 _ _ |a This work was funded by the National Basic Research Program of China (grant 2010CB428604), the National Science Foundation of China (grant 41075014 and 40830102) and the PhD program of Forschungszentrum Julich. We thank Gengchen Wang, Yuejian Xuan, Xiaowei Wan and Jianchun Bian for their contributions to Beijing ozonesonde observation. We thank J.-U. Grooss and A. Kunz for their very helpful comments. The European Centre for Medium-Range Weather Forecasts (ECMWF) is acknowledged for meteorological data support. We thank NASA (National Aeronautics and Space Administration) earth data website and Institute of Environmental Physics, University of Bremen for supplying the total ozone data.
520 _ _ |a Using a combination of ozonesonde data and numerical simulations of the Chemical Lagrangian Model of the Stratosphere (CLaMS), the trend of tropospheric ozone (O-3) 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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700 1 _ |0 P:(DE-HGF)0
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856 7 _ |u http://dx.doi.org/10.5194/acp-12-8389-2012
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