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@ARTICLE{vonHobe:44495,
      author       = {von Hobe, M. and Grooß, J.-U. and Müller, R. and
                      Hrechanyy, H. P. and Winkler, U. and Stroh, F.},
      title        = {{A} re-evaluation of the {C}l{O}/{C}l2/{O}2 equilibrium
                      constant based on stratospheric in-situ observations},
      journal      = {Atmospheric chemistry and physics},
      volume       = {5},
      issn         = {1680-7316},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {PreJuSER-44495},
      pages        = {693 - 702},
      year         = {2005},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {In-situ measurements of ClO and its dimer carried out
                      during the SOLVE II/VINTERSOL-EUPLEX and ENVISAT Validation
                      campaigns in the Arctic winter 2003 suggest that the thermal
                      equilibrium between the dimer formation and dissociation is
                      shifted significantly towards the monomer compared to the
                      current JPL 2002 recommendation. Detailed analysis of
                      observations made in thermal equilibrium allowed to
                      re-evaluate the magnitude and temperature dependence of the
                      equilibrium constant. A fit of the JPL format for
                      equilibrium constants yields K-EQ=3.61 x 10(-27)
                      exp(8167/T), but to reconcile the observations made at low
                      temperatures with the existing laboratory studies at room
                      temperature, a modified equation,
                      K-EQ=5.47x10(-25)(T/300)(-2.29)exp(6969/T), is required.
                      This format can be rationalised by a strong temperature
                      dependence of the reaction enthalpy possibly induced by
                      Cl2O2 isomerism effects. At stratospheric temperatures, both
                      equations are practically equivalent. Using the equilibrium
                      constant reported here rather than the JPL 2002
                      recommendation in atmospheric models does not have a large
                      impact on simulated ozone loss. Solely at large zenith
                      angles after sunrise, a small decrease of the ozone loss
                      rate due to the ClO dimer cycle and an increase due to the
                      ClO-BrO cycle ( attributed to the enhanced equilibrium ClO
                      concentrations) is observed, the net effect being a slightly
                      stronger ozone loss rate.},
      keywords     = {J (WoSType)},
      cin          = {ICG-I},
      ddc          = {550},
      cid          = {I:(DE-Juel1)VDB47},
      pnm          = {Chemie und Dynamik der Geo-Biosphäre},
      pid          = {G:(DE-Juel1)FUEK257},
      shelfmark    = {Meteorology $\&$ Atmospheric Sciences},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000227344000003},
      url          = {https://juser.fz-juelich.de/record/44495},
}