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@BOOK{Schmitgen:13480,
      author       = {Schmitgen, S.},
      title        = {{U}se of airborne {CO} measurements for {L}agrangian of
                      ozone formation and transport in continental plumes},
      volume       = {3822},
      issn         = {0944-2952},
      address      = {Jülich},
      publisher    = {Forschungszentrum, Zentralbibliothek},
      reportid     = {PreJuSER-13480, Juel-3822},
      series       = {Berichte des Forschungszentrums Jülich},
      year         = {2001},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {The anthropogenic ozone budget is investigated in remote
                      regions with respect to the influence of emissions of VOC
                      and NO., at source regions, and with regard to the relative
                      roles of ozone formation in the polluted boundary layer
                      (PBL) and in the free troposphere (FT). The investigation
                      makes use of airborne measurements aboard the United Kingdom
                      Meteorological Office (UKMO) C-130 Hercules aircraft
                      obtained during the European project TACIA (Testing
                      Atmospheric Chemistry in Anticyclones) and the UK project
                      ACSOE (Atmospheric Chemistry Studies in Oceanic
                      Environment). High resolution measurements ofCO as a
                      quasi-inert tracer of anthropogenic emissions were made and
                      interpreted . The experimental investigations of
                      anthropogenic plumes in the planetary boundary layer (TACIA)
                      and the remote free troposphere (ACSOE) are interpreted by
                      heuristic model calculations . The model set-up, with
                      modules for transport and chemistry, allows for a separation
                      of these processes in the analysis. The transport module in
                      combination with the CO observations is shown to be a useful
                      tool for the analysis of emissions and transport .
                      Convective transport into the free troposphere is identified
                      by combination of the transport module with satellite data.
                      The interpretation of observations distant from the source
                      regions, with respect to the influence of anthropogenic VOC
                      and NO, emissions on the ozone formation in a plume, is made
                      by an indirect inverse modelling approach. The method
                      involves extensive sensitivity studies regarding various
                      initial VOC and NO,, concentrations, in an EKMA framework.
                      Despite the large degree of abstraction, the results of EKMA
                      plot calculations can be compared to the measurements with
                      the help ofCO as emission tracer and enable the dependency
                      of the observed 03 on anthropogenic VOC and NO,, emissions
                      to be analysed. A central point of this study is the use of
                      statistical test methods for the analysis of the
                      significance of deviations between model results and
                      measurements . Sensitivity studies, regarding the dependence
                      of model results on the variability of input parameters, are
                      analysed with respect to confidence regions of the
                      observations . With these means, the following general
                      conclusions regarding ozone formation in continental plumes
                      transported into source free maritime areas are obtained:
                      The layers of enhanced CO and 03 in the FT, observed during
                      ACSOE flight A575, can only partly be explained by in-situ
                      production of ozone in the FT. Higher 03 production
                      efficiencies on a per-molecule basis of NO,, in the FT
                      compared to the PBL are found to be compensated by the
                      reduced NO, availability in the free troposphere, related to
                      CO. PBL-produced 03 is found not only to be important close
                      to source regions, but also for long range transport within
                      the FT in connection with cloud venting, where it
                      contributes to the tropospherc budget of ozone. The 03
                      formation within the PBL depends on a multitude of
                      parameters. It is shown for the example of the TACIA flight
                      A581, that the natural variability and uncertainties of
                      these parameters are still too high for an unambiguous
                      interpretation of observed 03 formation in a continental
                      plume with respect to anthropogenic NQ, and VOC emissions.
                      This complicates the task of estimating the influence of
                      export of pollutionderived ozone and its precursors on the
                      remote troposphere .},
      cin          = {ICG-II},
      cid          = {I:(DE-Juel1)VDB48},
      pnm          = {Chemie der Belasteten Atmosphäre},
      pid          = {G:(DE-Juel1)FUEK72},
      typ          = {PUB:(DE-HGF)3},
      url          = {https://juser.fz-juelich.de/record/13480},
}