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@PHDTHESIS{Tao:810740,
      author       = {Tao, Mengchu},
      title        = {{A}tmospheric {M}ixing in a {L}agrangian {F}ramework},
      volume       = {320},
      school       = {Universität Wuppertal},
      type         = {Dr.},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2016-03332},
      isbn         = {978-3-95806-142-2},
      series       = {Schriften des Forschungszentrums Jülich Reihe Energie $\&$
                      Umwelt / Energy $\&$ Environment},
      pages        = {146 S.},
      year         = {2016},
      note         = {Universität Wuppertal, Diss., 2016},
      abstract     = {Inaccurate representation of mixing in chemistry transport
                      models strongly influence the time evolution of all relevant
                      trace gases and, in particular, the qualitative
                      determination of the stratosphere-troposphere exchange
                      (STE). For this reason, a physics-based numerical
                      representation of mixing is required but remains an
                      uncertain piece for the atmospheric transport models.
                      However, the Lagrangian view of transport offers an
                      alternative to exploit the numerical diffusion for
                      parametrization of the physical mixing rather than to find
                      ways of avoiding this effect. Using the standard version of
                      the Chemical Lagrangian Model of the Stratosphere(CLaMS)
                      with mixing parametrization triggered by strong flow
                      deformations, a remarkable Sudden Stratospheric Warming
                      (SSW) case is investigated to reexamine transport,
                      especially mixing, through analyzing the variation of
                      stratospheric composition and of the tracer-tracer
                      correlations. The case study of SSW demonstrates the
                      intensified sub-seasonal variability of polar descent and
                      tropical upwelling, which further motivates the study of the
                      long-term impact of SSWs on the variability of the water
                      vapor in the tropical lower stratosphere based on a CLaMS
                      35-year run. A sub-seasonal SSW-associated dehydration
                      effect in the tropical lower stratosphere modulated by the
                      two quasi-biennial oscillation(QBO) phases is found. The
                      cooling and drying at the tropical tropopause, as a result
                      of enhanced breaking of planetary waves in the subtropics
                      during SSWs, is more intensive in the easterly QBO phase
                      than in the westerly QBO phase. [...]},
      cin          = {IEK-7},
      cid          = {I:(DE-Juel1)IEK-7-20101013},
      pnm          = {899 - ohne Topic (POF3-899) / HITEC - Helmholtz
                      Interdisciplinary Doctoral Training in Energy and Climate
                      Research (HITEC) (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF3-899 / G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)11},
      url          = {https://juser.fz-juelich.de/record/810740},
}