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@BOOK{Jger:151373,
author = {Jäger, Julia},
title = {{A}irborne {VOC} measurements on board the {Z}eppelin {NT}
during the {PEGASOS} campaigns in 2012 deploying the
improved {F}ast-{GC}-{MSD} {S}ystem},
volume = {205},
school = {Universität Köln},
type = {Dr.},
address = {Jülich},
publisher = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
reportid = {FZJ-2014-01342},
isbn = {978-3-89336-936-2},
series = {Schriften des Forschunszentrums Jülich, Reihe Energie $\&$
Umwelt / Energy $\&$ Environment},
pages = {182 S.},
year = {2014},
note = {Universität Köln, Diss., 2013},
abstract = {Volatile organic compounds (VOCs) comprise a large number
of different species, estimated to 104-106. They are emitted
on the Earth’s surface from a variety of biogenic and
anthropogenic sources. VOCs are removed by multiple pathways
from the atmosphere, by oxidation and finally by dry or wet
deposition. Most primary emitted VOCs are non-polar and
therefore have a low solubility in water. Oxidation
facilitates efficient VOC removal by wet deposition. In the
atmosphere the main photochemical VOC oxidation agent is the
OH radical. As a consequence the polarity of the VOCs is
increased and they can be removed faster. The oxidation of
VOCs proceeds in several steps until the VOCs are deposited
or are eventually oxidized to carbon dioxide. A downside of
the VOCs oxidation process lies in the production of
significant amounts ozone if nitrogen oxide is present which
is a serious health hazard. Most of the VOC oxidation takes
place in lower part of the atmosphere between the altitudes
of 100 to 1000 m, which is only sparsely analyzed.
Therefore, fast VOCs measurements byGC-MSD on board the
Zeppelin NT offered new important insights in the
distribution of VOCs. The measurements were performed within
the PEAGSOS campaigns in the Netherlands and in Italy in
2012. For the implementation of the GC-MSD system (HCG) on
board the Zeppelin it was reconstructed to enhance its
performance and to meet aviation requirements. The system
was optimized to measure VOCs ranging from C4 to C10 as well
asoxygenated VOCs (OVOCs) with a detection limit below 10
ppt. The analyzed VOCs for both parts of the campaigns
showed low mean concentration below 5 ppb for all VOCs.
Especially, the mixing ratios of the primary emitted VOCs
were very low with mean values lower than 200 ppt. Higher
concentrations could be observed for the OVOCs with mean
concentrations up to 5 ppb. The most abundant OVOCs apart
fromformaldehyde were methanol, ethanol, acetone and
acetaldehyde.},
cin = {IEK-8},
cid = {I:(DE-Juel1)IEK-8-20101013},
pnm = {233 - Trace gas and aerosol processes in the troposphere
(POF2-233)},
pid = {G:(DE-HGF)POF2-233},
typ = {PUB:(DE-HGF)3},
url = {https://juser.fz-juelich.de/record/151373},
}