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@ARTICLE{Tao:203187,
      author       = {Tao, M. and Konopka, P. and Ploeger, F. and Grooss,
                      Jens-Uwe and Müller, Rolf and Volk, C. M. and Walker, K. A.
                      and Riese, M.},
      title        = {{I}mpact of the 2009 major sudden stratospheric warming on
                      the composition of the stratosphere},
      journal      = {Atmospheric chemistry and physics},
      volume       = {15},
      number       = {15},
      issn         = {1680-7324},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {FZJ-2015-05188},
      pages        = {8695 - 8715},
      year         = {2015},
      abstract     = {In a case study of a remarkable major sudden stratospheric
                      warming (SSW) during the boreal winter 2008/09, we
                      investigate how transport and mixing triggered by this event
                      affected the composition of the entire stratosphere in the
                      Northern Hemisphere. We simulate this event with the
                      Chemical Lagrangian Model of the Stratosphere (CLaMS), both
                      with optimized mixing parameters and with no mixing, i.e.
                      with transport occurring only along the Lagrangian
                      trajectories. The results are investigated by using
                      tracer–tracer correlations and by applying the transformed
                      Eulerian-mean formalism. The CLaMS simulation of N2O and O3,
                      and in particular of the O3–N2O tracer correlations with
                      optimized mixing parameters, shows good agreement with the
                      Aura Microwave Limb Sounder (MLS) data. The spatial
                      distribution of mixing intensity in CLaMS correlates fairly
                      well with the Eliassen–Palm flux convergence. This
                      correlation illustrates how planetary waves drive mixing. By
                      comparing simulations with and without mixing, we find that
                      after the SSW, poleward transport of air increases, not only
                      across the vortex edge but also across the subtropical
                      transport barrier. Moreover, the SSW event, at the same
                      time, accelerates polar descent and tropical ascent of the
                      Brewer–Dobson circulation. The accelerated ascent in the
                      tropics and descent at high latitudes first occurs in the
                      upper stratosphere and then propagates downward to the lower
                      stratosphere. This downward propagation takes over 1 month
                      from the potential temperature level of 1000 to 400 K.},
      cin          = {IEK-7},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-7-20101013},
      pnm          = {244 - Composition and dynamics of the upper troposphere and
                      middle atmosphere (POF3-244) / HITEC - Helmholtz
                      Interdisciplinary Doctoral Training in Energy and Climate
                      Research (HITEC) (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF3-244 / G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000359949700009},
      doi          = {10.5194/acp-15-8695-2015},
      url          = {https://juser.fz-juelich.de/record/203187},
}