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@ARTICLE{Vogel:51770,
author = {Vogel, B. and Feng, W. and Streibel, M. and Müller, R.},
title = {{T}he potential impact of {C}l{O}x radical complexes on
polar stratospheric ozone loss processes},
journal = {Atmospheric chemistry and physics},
volume = {6},
issn = {1680-7316},
address = {Katlenburg-Lindau},
publisher = {EGU},
reportid = {PreJuSER-51770},
pages = {3099 - 3114},
year = {2006},
note = {Record converted from VDB: 12.11.2012},
abstract = {The importance of radical-molecule complexes for
atmospheric chemistry has been discussed in recent years. In
particular, the existence of a ClO center dot O-2 and ClOx
water radical complexes like ClO center dot H2O, OClO center
dot H2O, OClO center dot(H2O)(2), and ClOO center dot H2O
could play a role in enhancing the ClO dimer (Cl2O2)
formation and therefore may constitute an important
intermediate in polar stratospheric ozone loss cycles. Model
simulations performed with the Chemical Lagrangian Model of
the Stratosphere (CLaMS) will be presented to study the role
of radical complexes on polar stratospheric ozone loss
processes. The model simulations are performed for the
Arctic winter 2002/2003 at a level of 500 K potential
temperature and the results are compared to observed ozone
loss rates determined by the Match technique. Moreover,
recently reported values for the equilibrium constant of the
ClO dimer formation are used to restrict the number of
possible model results caused by large uncertainties about
radical complex chemistry. Our model simulations show that
the potential impact of ClO center dot O-2 on polar ozone
loss processes is small (dO(3)/ dt << 0.5 ppb/sunlight h)
provided that the ClO center dot O-2 complex is only weakly
stable. Assuming that the binding energies of the ClOx water
complexes are much higher than theoretically predicted an
enhancement of the ozone loss rate by up to approximate to
0.5 ppb/sunlight h is simulated. Because it is unlikely that
the ClOx water complexes are much more stable than predicted
we conclude that these complexes have no impact on polar
stratospheric ozone loss processes. Although large
uncertainties about radical complex chemistry exist, our
findings show that the potential impact of ClOx radical
molecule complexes on polar stratospheric ozone loss
processes is very small considering pure gas-phase
chemistry. However the existence of ClOx radical-molecule
complexes could possibly explain discrepancies for the
equilibrium constant of the ClO dimer formation found
between recent laboratory and stratospheric measurements.},
keywords = {J (WoSType)},
cin = {ICG-I},
ddc = {550},
cid = {I:(DE-Juel1)VDB47},
pnm = {Atmosphäre und Klima},
pid = {G:(DE-Juel1)FUEK406},
shelfmark = {Meteorology $\&$ Atmospheric Sciences},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000239271100001},
url = {https://juser.fz-juelich.de/record/51770},
}