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@ARTICLE{SuminskaEbersoldt:18761,
author = {Suminska-Ebersoldt, O. and Lehmann, R. and Wegner, T. and
Grooß, J.-U. and Hösen, E. and Weigel, R. and Frey, W. and
Griessbach, S. and Mitev, V. and Emde, C. and Volk, C. M.
and Borrmann, S. and Rex, M. and Stroh, F. and von Hobe, M.},
title = {{C}l{OOC}l photolysis at high solar zenith angles: analysis
of the {RECONCILE} self-match flight},
journal = {Atmospheric chemistry and physics},
volume = {12},
issn = {1680-7316},
address = {Katlenburg-Lindau},
publisher = {EGU},
reportid = {PreJuSER-18761},
pages = {1353 - 1365},
year = {2012},
note = {The RECONCILE project is funded under the European
Commission Seventh Framework Programme (FP7) under the Grant
number RECONCILE-226365-FP7-ENV-2008-1. The Ph.D. student
position of Olga Suminska-Ebersoldt is financed within the
ENVIVAL-LIFE project through a grant from Bundesministerium
fur Wirtschaft (BMWi) via DLR, Germany.},
abstract = {The photolysis rate constant of dichlorine peroxide
(ClOOCl, ClO dimer) J(ClOOCl) is a critical parameter in
catalytic cycles destroying ozone (O-3) in the polar
stratosphere. In the atmospherically relevant wavelength
region (lambda > 310 nm), significant discrepancies between
laboratory measurements of ClOOCl absorption cross sections
and spectra cause a large uncertainty in J(ClOOCl). Previous
investigations of the consistency of published JClOOCl with
atmospheric observations of chlorine monoxide (ClO) and
ClOOCl have focused on the photochemical equilibrium between
ClOOCl formation and photolysis, and thus could only
constrain the ratio of J(ClOOCl) over the ClOOCl formation
rate constant k(rec). Here, we constrain the atmospherically
effective J(ClOOCl) independent of k(rec), using ClO
measured in the same air masses before and directly after
sunrise during an aircraft flight that was part of the
RECONCILE field campaign in the winter 2010 from Kiruna,
Sweden. Over sunrise, when the ClO/ClOOCl system comes out
of thermal equilibrium and the influence of the ClO
recombination reaction is negligible, the increase in ClO
concentrations is significantly faster than expected from
J(ClOOCl) based on the absorption spectrum proposed by Pope
et al. (2007), but does not warrant cross sections larger
than recently published values by Papanastasiou et al.
(2009). In particular, the existence of a significant ClOOCl
absorption band longwards of 420 nm is not supported by our
observations. The observed night-time ClO would not be
consistent with a ClO/ClOOCl thermal equilibrium constant
significantly higher than the one proposed by Plenge et al.
(2005).},
keywords = {J (WoSType)},
cin = {IEK-7 / JSC},
ddc = {550},
cid = {I:(DE-Juel1)IEK-7-20101013 / I:(DE-Juel1)JSC-20090406},
pnm = {Atmosphäre und Klima (FUEK491) / Scientific Computing
(FUEK411) / RECONCILE - Reconciliation of essential process
parameters for an enhanced predictability of arctic
stratospheric ozone loss and its climate interactions.
(226365) / 411 - Computational Science and Mathematical
Methods (POF2-411)},
pid = {G:(DE-Juel1)FUEK491 / G:(DE-Juel1)FUEK411 /
G:(EU-Grant)226365 / G:(DE-HGF)POF2-411},
shelfmark = {Meteorology $\&$ Atmospheric Sciences},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000300656500009},
doi = {10.5194/acp-12-1353-2012},
url = {https://juser.fz-juelich.de/record/18761},
}