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@PHDTHESIS{Richter:62596,
      author       = {Richter, Cornelia Anna},
      title        = {{O}zone {P}roduction in the {A}tmosphere {S}imulation
                      {C}hamber {SAPHIR}},
      volume       = {2},
      issn         = {1866-1793},
      school       = {Univ. Köln},
      type         = {Dr. (Univ.)},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {PreJuSER-62596},
      isbn         = {978-3-89336-513-5},
      series       = {Schriften des Forschungszentrums Jülich : Energie $\&$
                      Umwelt / Energy $\&$ Environment},
      pages        = {XIV, 147 S.},
      year         = {2008},
      note         = {Record converted from VDB: 12.11.2012; Köln, Univ., Diss.,
                      2007},
      abstract     = {Tropospheric ozone in high concentrations is harmful for
                      mankind and the environment as a whole. As it is a
                      greenhouse gas, its rising due to anthropogenic emissions of
                      the precursor species contributes to global warming. By
                      being the precursor specie for all oxidizing agents in the
                      atmosphere, e.g. the highly reactive OH radical, and being
                      an oxidizing agent itself, ozone is very important in
                      atmospheric chemistry. Due to this importance, a sound
                      understanding of the chemical ozone production processes is
                      needed. The necessary precursors for the photochemical
                      production are the mainly anthropogenic nitrogen oxides
                      NO$_{x}$ and the both anthropogenic and biogenic volatile
                      organic compounds. In principle, the processes are fairly
                      understood. In details huge uncertainties still exist. These
                      have to be examined further to allow for well-founded
                      predictions of short and long term ozone concentrations,
                      e.g. to early warn the population off injurious values to
                      come or for the use in climate change modelling. In the
                      atmosphere simulation chamber SAPHIR chemical processes of
                      the troposphere can be examined nearly without physical
                      caused changes, like transport, mixing, or unknown sources
                      and sinks of trace constituents. Ambient conditions
                      concerning trace gas concentrations, temperature, pressure
                      and lighting conditions characterize the SAPHIR experiments.
                      To understand the complex processes influencing trace gas
                      concentrations in nature, field experiments are obligatory.
                      For the interpretation of measured field data model
                      calculations are needed to distinguish between chemical and
                      physical influences. The test of these models is only
                      feasible under the physically controlled conditions inside
                      the SAPHIR chamber. In this thesis, three different
                      approaches, which strongly vary concerning their needed
                      (measured) input and the computational effort, for the
                      prediction of the photochemical ozone production were tested
                      against SAPHIR chamber experiments. First of all model runs
                      on the basis of the Master ChemicalMechanism, which compiles
                      the state of the art knowledge in atmospheric chemistry in
                      one mechanism, were tested at ambient trace gas
                      concentrations for the first time. These model runs only
                      need few measured input but a high computational effort. The
                      newly developed First Degradation Step approach in contrast
                      needs a lot of measured input, which then is combined by
                      fundamental arithmetic to calculate the ozone production.
                      The third, also new approach tested is an even simpler
                      method, which estimates the ozone production by a simple
                      combination of measured OH concentrations and OH lifetimes.
                      As the initial organic compound for the SAPHIR experiments
                      isoprene and its degradation products methacrolein and
                      methyl vinyl ketone were selected as on a global scale
                      isoprene is the mostly emitted volatile organic compound,
                      which dominates photochemical ozone production in many
                      regions. In the second part of this thesis special attention
                      was directed on the methacrolein degradation. The Master
                      Chemical Mechanism model showed strong deviations concerning
                      the measured NO$_{x}$ concentrations. These discrepancies
                      could partly be explained and were traced back to errors of
                      the Master Chemical Mechanism.},
      cin          = {ICG-2},
      ddc          = {333.7},
      cid          = {I:(DE-Juel1)VDB791},
      pnm          = {Atmosphäre und Klima},
      pid          = {G:(DE-Juel1)FUEK406},
      typ          = {PUB:(DE-HGF)11 / PUB:(DE-HGF)3},
      url          = {https://juser.fz-juelich.de/record/62596},
}