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@PHDTHESIS{Hoppe:156285,
      author       = {Hoppe, Charlotte Marinke},
      title        = {{A} {L}agrangian transport core for the simulation of
                      stratospheric trace species in a {C}hemistry {C}limate
                      {M}odel},
      volume       = {226},
      school       = {Universität Wuppertal},
      type         = {Dr.},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2014-05076},
      isbn         = {978-3-89336-984-3},
      series       = {Schriften des Forschungszentrums Jülich Reihe Energie $\&$
                      Umwelt / Energy $\&$ Environment},
      pages        = {112 S.},
      year         = {2014},
      note         = {Universität Wuppertal, Diss., 2014},
      abstract     = {Lagrangian transport schemes have proven to be useful tools
                      for modelling stratospherictrace gas transport since they
                      are less diusive than classical Eulerian schemesand
                      therefore especially well suited for maintaining steep
                      tracer gradients as observedin the atmosphere. Here, the
                      implementation of the full-Lagrangian transportcore of the
                      Chemical Lagrangian Model of the Stratosphere (CLaMS) in the
                      ECHAM/MESSy Atmospheric Chemistry model (EMAC) is presented.
                      A ten-year time-slice simulation was performed to evaluate
                      the coupled model system EMAC/CLaMS. Simulated zonal mean
                      age of air distributions were compared to the age of air
                      derived from airborne measurements, showing the expected
                      characteristicsof the stratospheric circulation.
                      Climatologies of long-lived tracers (CFC-11(CCl$_{3}$F),
                      CFC-12 (CCl$_{2}$F$_{2}$), CH$_{4}$, N$_{2}$O) were
                      calculated using the standard ux-formsemi-Lagrangian
                      transport scheme (FFSL) in EMAC, as well as the new CLaMS
                      Lagrangian transport scheme. The climatologies were compared
                      both to each other and also to satellite measurements of
                      trace gases. The dierences in the resulting tracer
                      distributions are most pronounced in the regions of strong
                      transport barriers, namely the edge of the tropical pipe,
                      the tropopause, and the edge of the polarvortex. These
                      regions were analysed in detail and show improved results
                      using the Lagrangian transport scheme, with stronger
                      gradients at the respective transport barriers. The analyses
                      of various trace gases and age of air in the polar vortex
                      regions shows that the CLaMS Lagrangian transport scheme
                      produces a stronger, more realistic transport barrier at the
                      edge of the polar vortex than the FFSL transportscheme of
                      EMAC. Differences in simulated age of air are in the range
                      of up to one year in the Arctic polar vortex in late
                      winter/early spring. The newly coupled model system
                      EMAC/CLaMS thus constitutes a suitable tool for future model
                      studies, e.g. for the simulation of polar ozone depletion,
                      based on a sophisticated stratospheric tracer transport.},
      keywords     = {Dissertation (GND)},
      cin          = {IEK-8 / IEK-7},
      cid          = {I:(DE-Juel1)IEK-8-20101013 / I:(DE-Juel1)IEK-7-20101013},
      pnm          = {234 - Composition and Dynamics of the Upper Troposphere and
                      Stratosphere (POF2-234) / 233 - Trace gas and aerosol
                      processes in the troposphere (POF2-233)},
      pid          = {G:(DE-HGF)POF2-234 / G:(DE-HGF)POF2-233},
      typ          = {PUB:(DE-HGF)11},
      url          = {https://juser.fz-juelich.de/record/156285},
}