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@ARTICLE{Hoppe:151845,
      author       = {Hoppe, Charlotte and Hoffmann, L. and Konopka, P. and
                      Grooß, J.-U. and Ploeger, F. and Günther, G. and Jöckel,
                      P. and Müller, Rolf},
      title        = {{T}he implementation of the {CL}a{MS} {L}agrangian
                      transport core into the chemistry climate model {EMAC}
                      2.40.1: application on age of air and transport of
                      long-lived trace species},
      journal      = {Geoscientific model development discussions},
      volume       = {7},
      number       = {2},
      issn         = {1991-962X},
      address      = {Katlenburg-Lindau},
      publisher    = {Copernicus},
      reportid     = {FZJ-2014-01703},
      pages        = {1759 - 1790},
      year         = {2014},
      abstract     = {Lagrangian transport schemes have proven to be useful tools
                      for modelling stratospheric trace gas transport since they
                      are less diffusive than classical Eulerian schemes and
                      therefore especially well suited for maintaining steep
                      tracer gradients. Here, we present the implementation of the
                      full-Lagrangian transport core of the Chemical Lagrangian
                      Model of the Stratosphere (CLaMS) into the ECHAM/MESSy
                      Atmospheric Chemistry model (EMAC). We performed a ten-year
                      time-slice simulation to evaluate the coupled model system
                      EMAC/CLaMS. Simulated zonal mean age of air distributions
                      are compared to age of air derived from airborne
                      measurements, showing a good overall representation of the
                      stratospheric circulation. Results from the new Lagrangian
                      transport scheme are compared to tracer distributions
                      calculated with the standard flux-form semi-Lagrangian
                      (FFSL) transport scheme in EMAC. The differences in the
                      resulting tracer distributions are most pronounced in the
                      regions of strong transport barriers. The polar vortices are
                      presented as an example and simulated trace gas
                      distributions are compared to satellite measurements. The
                      analysis of CFC-11, N2O, CH4, 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 transport
                      scheme of EMAC. Differences in simulated age of air range up
                      to one year in the Arctic polar vortex in late winter/early
                      spring. The new coupled model system EMAC/CLaMS thus
                      constitutes a suitable tool for future model studies of
                      stratospheric tracer transport.},
      cin          = {IEK-7 / JSC},
      ddc          = {910},
      cid          = {I:(DE-Juel1)IEK-7-20101013 / I:(DE-Juel1)JSC-20090406},
      pnm          = {244 - Composition and dynamics of the upper troposphere and
                      middle atmosphere (POF3-244) / 411 - Computational Science
                      and Mathematical Methods (POF2-411)},
      pid          = {G:(DE-HGF)POF3-244 / G:(DE-HGF)POF2-411},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.5194/gmdd-7-1759-2014},
      url          = {https://juser.fz-juelich.de/record/151845},
}