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@ARTICLE{Gnther:59284,
      author       = {Günther, G. and Müller, R. and von Hobe, M. and Stroh, F.
                      and Konopka, P. and Volk, C.},
      title        = {{Q}uantification of transport across the boundary of the
                      lower stratospheric vortex during {A}rctic winter 2002/2003},
      journal      = {Atmospheric chemistry and physics / Discussions},
      volume       = {7},
      issn         = {1680-7367},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {PreJuSER-59284},
      pages        = {17559 - 17597},
      year         = {2007},
      note         = {The authors would like to thank the European Centre for
                      Medium-Range Weather Forecasts (ECMWF) for providing the
                      meteorological data, and N. Spelten, N. Thomas and R. Bauer
                      for excellent support with data handling and programming.},
      abstract     = {Strong perturbations of the Arctic stratosphere during the
                      winter 2002/2003 by planetary waves led to enhanced
                      stretching and folding of the vortex. On two occasions the
                      vortex in the lower stratosphere split into two secondary
                      vortices that re-merged after some days. As a result of
                      these strong disturbances the role of transport in and out
                      of the vortex was stronger than usual. An advection and
                      mixing simulation with the Chemical Lagrangian Model of the
                      Stratosphere (CLaMS) utilising a suite of inert tracers
                      tagging the original position of the air masses has been
                      carried out. The results show a variety of synoptic and
                      small scale features in the vicinity of the vortex boundary,
                      especially long filaments peeling off the vortex edge and
                      being slowly mixed into the mid latitude environment. The
                      vortex folding events, followed by re-merging of different
                      parts of the vortex led to strong filamentation of the
                      vortex interior. During January, February, and March 2003
                      flights of the Russian high-altitude aircraft Geophysica
                      were performed in order to probe the vortex. filaments and
                      in one case the merging zone between the secondary vortices.
                      Comparisons between CLaMS results and observations obtained
                      from the Geophysica flights show in general good
                      agreement.Several areas affected by both transport and
                      strong mixing could be identified, allowing explanation of
                      many of the structures observed during the flights.
                      Furthermore, the CLaMS simulations allow for a
                      quantification of the air mass exchange between mid
                      latitudes and the vortex interior. The simulation suggests
                      that after the formation of the vortex was completed, its
                      interior remaind relativel undisturbed. Only during the two
                      re-merging events were substantial amounts of extra-vortex
                      air transported into the polar vortex. When in March the
                      vortex starts weakening additional influence from lower
                      latitudes becomes apparent in the model results.},
      keywords     = {J (WoSType)},
      cin          = {ICG-1},
      ddc          = {550},
      cid          = {I:(DE-Juel1)VDB790},
      pnm          = {Atmosphäre und Klima},
      pid          = {G:(DE-Juel1)FUEK406},
      typ          = {PUB:(DE-HGF)16},
      url          = {https://juser.fz-juelich.de/record/59284},
}