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@ARTICLE{Wang:22838,
      author       = {Wang, Y. and Konopka, P. and Liu, Y. and Chen, H. and
                      Müller, R. and Plöger, F. and Riese, M. and Cai, Z. and
                      Lü, D.},
      title        = {{T}ropospheric ozone trend over {B}eijing from 2001-2010:
                      ozonesonde measurements and modeling analysis},
      journal      = {Atmospheric chemistry and physics},
      volume       = {12},
      issn         = {1680-7316},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {PreJuSER-22838},
      pages        = {8389 - 8399},
      year         = {2012},
      note         = {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.},
      abstract     = {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.},
      keywords     = {J (WoSType)},
      cin          = {IEK-7},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-7-20101013},
      pnm          = {Atmosphäre und Klima},
      pid          = {G:(DE-Juel1)FUEK491},
      shelfmark    = {Meteorology $\&$ Atmospheric Sciences},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000309424300006},
      doi          = {10.5194/acp-12-8389-2012},
      url          = {https://juser.fz-juelich.de/record/22838},
}