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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},
}