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@TECHREPORT{Duhnke:864943,
      author       = {Duhnke, K. and Smit, Herman G.J. and Kley, Dieter and
                      Marenco, A. and Speth, P. and Wefers, J.},
      title        = {{U}ntersuchung der in {MOZAIC} gemessenen {O}zon- und
                      {W}asserdampfverteilung im polaren {S}trahlstrom über dem
                      {N}ordatlantik},
      volume       = {3593},
      number       = {Juel-3593},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich, Zentralbibliothek, Verlag},
      reportid     = {FZJ-2019-04535, Juel-3593},
      series       = {Berichte des Forschungszentrums Jülich},
      pages        = {149 p.},
      year         = {1998},
      abstract     = {Within the MOZAIC project continuous measurements of ozone
                      and water vapour could be established in the upper
                      troposphere for the first time. By means of this data set
                      the mean stratospheric-tropospheric-exchange in the region
                      of the polar jet is analyzed in a statistical way. Comparing
                      the concentrations in the vertical cross section of the jet
                      with climatological distributions, the vertical transport of
                      ozone and water vapour in the jet is determined. As annual
                      rnean the vertical turning direction within the jet stream
                      is analyzed as well as the amount of ozone that is
                      transported from the stratosphere into the troposphere and
                      that influences the tropospheric ozone budget. The
                      distributions of ozone, relative and specific humidity as
                      well as the temperature consistently point towards an annual
                      mean thermal direct circulation within the jet cross
                      section. The mean vertical circulation depends mainly an the
                      meridional temperature gradient, the stratospheric downward
                      pumping and the seasonal variation of the tropopause height.
                      Due to the seasonal variation of these effects the most
                      ozone is transported downwards from the stratosphere into
                      the troposphere in spring time. The vertical transport of
                      ozone is lowest in autumn. A simple estimation results in a
                      netto-downward-flux of ozone in the order of 7 $\cdot$
                      10$^{11}$ molecules/cm$^{2}$/s. The good agreement of this
                      result with complex model caleulations shows that the order
                      of the ozone flux amount through the tropopause within the
                      jet can be convincingly established from observational data
                      as well as from model caleulations. Higher Exactness of the
                      results is limited by the restricted knowledge of dynamical
                      and chemical processes in the atmosphere.},
      cin          = {PRE-2000},
      cid          = {I:(DE-Juel1)PRE2000-20140101},
      pnm          = {899 - ohne Topic (POF3-899)},
      pid          = {G:(DE-HGF)POF3-899},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)29},
      url          = {https://juser.fz-juelich.de/record/864943},
}