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@PHDTHESIS{SuminskaEbersoldt:22872,
      author       = {Suminska-Ebersoldt, Olga},
      title        = {{S}tratospheric {C}l{OOC}l chemistry at high solar zenith
                      angles},
      volume       = {151},
      school       = {Universität Wuppertal},
      type         = {Dr.},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {PreJuSER-22872},
      isbn         = {978-3-89336-817-4},
      series       = {Schriften des Forschungszentrums Jülich : Energie $\&$
                      Umwelt / Energy $\&$ Environment},
      pages        = {VI, 126 S.},
      year         = {2012},
      note         = {Record converted from JUWEL: 18.07.2013; Universität
                      Wuppertal, Diss., 2012},
      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 (310 – 500 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
                      J$_{ClOOCl}$ 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$_{ClOOCl}$ and the
                      ClOOCl formation rate constant k$_{rec}$. Here, the
                      atmospherically effective J$_{ClOOCl}$ was constrained
                      independent of krec, using ClO measured in the same air
                      masses before and directly after sunrise during an aircraft
                      flight that was carried out as a part of the RECONCILE field
                      campaign in winter 2010 over Kiruna, Sweden. Over sunrise,
                      when the ClO/ClOOCl system comes out of thermal equilibrium,
                      the influence of the ClO recombination reaction is
                      negligible and the ClO concentration increase results from
                      the photolysis of ClOOCl. J$_{ClOOCl}$ values based on four
                      absorption cross sections and spectra were estimated for the
                      atmospheric conditions on the flight track and resulting ClO
                      concentration increases were compared with the observed ClO
                      rise. The analysis shows, that the increase in measured ClO
                      concentrations was significantly faster than expected from
                      J$_{ClOOCl}$ based on the absorption spectrum proposed by
                      Pope et al. (2007), but did 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 420nm is not supported
                      by the observations. The observed night-time ClO is not
                      consistent with a ClO/ClOOCl thermal equilibrium constant
                      significantly higher [...]},
      cin          = {IEK-7},
      ddc          = {500},
      cid          = {I:(DE-Juel1)IEK-7-20101013},
      pnm          = {Atmosphäre und Klima},
      pid          = {G:(DE-Juel1)FUEK491},
      typ          = {PUB:(DE-HGF)11 / PUB:(DE-HGF)3},
      url          = {https://juser.fz-juelich.de/record/22872},
}