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@ARTICLE{DiLiberto:280098,
      author       = {Di Liberto, L. and Lehmann, R. and Tritscher, I. and
                      Fierli, F. and Mercer, J. L. and Snels, M. and Di
                      Donfrancesco, G. and Deshler, T. and Luo, B. P. and Grooss,
                      Jens-Uwe and Arnone, E. and Dinelli, B. M. and Cairo, F.},
      title        = {{L}agrangian analysis of microphysical and chemical
                      processes in the {A}ntarctic stratosphere: a case study},
      journal      = {Atmospheric chemistry and physics},
      volume       = {15},
      number       = {12},
      issn         = {1680-7324},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {FZJ-2015-07845},
      pages        = {6651 - 6665},
      year         = {2015},
      abstract     = {We investigated chemical and microphysical processes in the
                      late winter in the Antarctic lower stratosphere, after the
                      first chlorine activation and initial ozone depletion. We
                      focused on a time interval when both further chlorine
                      activation and ozone loss, but also chlorine deactivation,
                      occur.We performed a comprehensive Lagrangian analysis to
                      simulate the evolution of an air mass along a 10-day
                      trajectory, coupling a detailed microphysical box model to a
                      chemistry model. Model results have been compared with in
                      situ and remote sensing measurements of particles and ozone
                      at the start and end points of the trajectory, and satellite
                      measurements of key chemical species and clouds along
                      it.Different model runs have been performed to understand
                      the relative role of solid and liquid polar stratospheric
                      cloud (PSC) particles for the heterogeneous chemistry, and
                      for the denitrification caused by particle sedimentation.
                      According to model results, under the conditions
                      investigated, ozone depletion is not affected significantly
                      by the presence of nitric acid trihydrate (NAT) particles,
                      as the observed depletion rate can equally well be
                      reproduced by heterogeneous chemistry on cold liquid
                      aerosol, with a surface area density close to background
                      values.Under the conditions investigated, the impact of
                      denitrification is important for the abundances of chlorine
                      reservoirs after PSC evaporation, thus stressing the need to
                      use appropriate microphysical models in the simulation of
                      chlorine deactivation. We found that the effect of particle
                      sedimentation and denitrification on the amount of ozone
                      depletion is rather small in the case investigated. In the
                      first part of the analyzed period, when a PSC was present in
                      the air mass, sedimentation led to a smaller available
                      particle surface area and less chlorine activation, and thus
                      less ozone depletion. After the PSC evaporation, in the last
                      3 days of the simulation, denitrification increases ozone
                      loss by hampering chlorine deactivation.},
      cin          = {IEK-7},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-7-20101013},
      pnm          = {244 - Composition and dynamics of the upper troposphere and
                      middle atmosphere (POF3-244)},
      pid          = {G:(DE-HGF)POF3-244},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000357117500007},
      doi          = {10.5194/acp-15-6651-2015},
      url          = {https://juser.fz-juelich.de/record/280098},
}