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@ARTICLE{Groo:18311,
      author       = {Grooß, J.-U. and Brautzsch, K. and Pommrich, R. and
                      Solomon, S. and Müller, R.},
      title        = {{S}tratospheric ozone chemistry in the {A}ntarctic:{W}hat
                      controls the lowst values that can be reached and their
                      recovery?},
      journal      = {Atmospheric chemistry and physics},
      volume       = {11},
      issn         = {1680-7316},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {PreJuSER-18311},
      pages        = {12217 - 12226},
      year         = {2011},
      note         = {We thank Herman Smit and Peter von der Gathen for helpful
                      discussions on the detection limits of ozone sondes. This
                      work was supported by the RECONCILE project of the European
                      Commission Seventh Framework Programme (FP7) under the Grant
                      number RECONCILE-226365-FP7-ENV-2008-1.},
      abstract     = {Balloon-borne observations of ozone from the South Pole
                      Station have been reported to reach ozone mixing ratios
                      below the detection limit of about 10 ppbv at the 70 hPa
                      level by late September. After reaching a minimum, ozone
                      mixing ratios increase to above 1 ppmv on the 70 hPa level
                      by late December. While the basic mechanisms causing the
                      ozone hole have been known for more than 20 yr, the detailed
                      chemical processes determining how low the local
                      concentration can fall, and how it recovers from the minimum
                      have not been explored so far. Both of these aspects are
                      investigated here by analysing results from the Chemical
                      Lagrangian Model of the Stratosphere (CLaMS). As ozone falls
                      below about 0.5 ppmv, a balance is maintained by gas phase
                      production of both HCl and HOCl followed by heterogeneous
                      reaction between these two compounds in these simulations.
                      Thereafter, a very rapid, irreversible chlorine deactivation
                      into HCl can occur, either when ozone drops to values low
                      enough for gas phase HCl production to exceed chlorine
                      activation processes or when temperatures increase above the
                      polar stratospheric cloud (PSC) threshold. As a consequence,
                      the timing and mixing ratio of the minimum ozone depends
                      sensitively on model parameters, including the ozone
                      initialisation. The subsequent ozone increase between
                      October and December is linked mainly to photochemical ozone
                      production, caused by oxygen photolysis and by the oxidation
                      of carbon monoxide and methane.},
      keywords     = {J (WoSType)},
      cin          = {IEK-7},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-7-20101013},
      pnm          = {Atmosphäre und Klima / RECONCILE - Reconciliation of
                      essential process parameters for an enhanced predictability
                      of arctic stratospheric ozone loss and its climate
                      interactions. (226365)},
      pid          = {G:(DE-Juel1)FUEK491 / G:(EU-Grant)226365},
      shelfmark    = {Meteorology $\&$ Atmospheric Sciences},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000298134300019},
      doi          = {10.5194/acp-11-12217-2011},
      url          = {https://juser.fz-juelich.de/record/18311},
}