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@ARTICLE{Konopka:39732,
      author       = {Konopka, Paul and Grooß, J.-U. and Hoppel, K. W. and
                      Steinhorst, H.-M. and Müller, R.},
      title        = {{M}ixing and chemical ozone loss during and after the
                      {A}ntarctic polar vortex major warming in {S}eptember 2002},
      journal      = {Journal of the atmospheric sciences},
      volume       = {62},
      issn         = {0022-4928},
      address      = {Boston, Mass.},
      publisher    = {American Meteorological Soc.},
      reportid     = {PreJuSER-39732},
      pages        = {848 - 859},
      year         = {2005},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {The 3D version of the Chemical Lagrangian Model of the
                      Stratosphere (CLAMS) is used to study the transport of CH4
                      and 03 in the Antarctic stratosphere between I September and
                      30 November 2002, that is, over the time period when
                      unprecedented major stratospheric warming in late September
                      split the polar vortex into two parts. The isentropic and
                      cross-isentropic velocities in CLAMS are derived from ECMWF
                      winds and heating/cooling rates calculated with a radiation
                      module. The irreversible part of transport, that is, mixing,
                      is driven by the local horizontal strain and vertical shear
                      rates with mixing parameters deduced from in situ
                      observations.The CH4 distribution after the vortex split
                      shows a completely different behavior above and below 600 K.
                      Above this potential temperature level, until the beginning
                      of November, a significant part of vortex air is transported
                      into the midlatitudes up to 40 degrees S. The lifetime of
                      the vortex remnants formed after the vortex split decreases
                      with the altitude with values of about 3 and 6 weeks at 900
                      and 700 K, respectively.Despite this enormous dynamical
                      disturbance of the vortex, the intact part between 400 and
                      600 K that "survived" the major warming was strongly
                      isolated from the extravortex air until the end of November.
                      According to CLAMS simulations, the air masses within this
                      part of the vortex did not experience any significant
                      dilution with the midlatitude air.By transporting ozone in
                      CLAMS as a passive tracer, the chemical ozone loss was
                      estimated from the difference between the observed [Polar
                      Ozone and Aerosol Measurement III (POAM 111) and Halogen
                      Occultation Experiment (HALOE)] and simulated ozone
                      profiles. Starting from I September, up to 2.0 ppmv O-3
                      around 480 K and about 70 Dobson units between 450 and 550 K
                      were destroyed until the vortex was split. After the major
                      warming, no additional ozone loss can be derived, but in the
                      intact vortex part between 450 and 550 K, the accumulated
                      ozone loss was "frozen in" until the end of November.},
      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:000228012100024},
      doi          = {10.1175/JAS-3329.1},
      url          = {https://juser.fz-juelich.de/record/39732},
}