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@ARTICLE{Rolf:189264,
      author       = {Rolf, C. and Afchine, A. and Bozem, H. and Buchholz, B. and
                      Ebert, V. and Guggenmoser, T. and Hoor, P. and Konopka, P.
                      and Kretschmer, E. and Müller, S. and Schlager, H. and
                      Spelten, N. and Sumińska-Ebersoldt, O. and Ungermann, Jörn
                      and Zahn, A. and Krämer, M.},
      title        = {{T}ransport of {A}ntarctic stratospheric strongly
                      dehydrated air into the troposphere observed during the
                      {HALO}-{ESMV}al campaign 2012},
      journal      = {Atmospheric chemistry and physics / Discussions},
      volume       = {15},
      number       = {6},
      issn         = {1680-7375},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {FZJ-2015-02442},
      pages        = {7895 - 7932},
      year         = {2015},
      abstract     = {Dehydration in the Antarctic winter stratosphere is a
                      well-known phenomenon that is occasionally observed by
                      balloon-borne and satellite measurements. However, in-situ
                      measurements of dehydration in the Antarctic vortex are very
                      rare. Here, we present detailed observations with the
                      in-situ and GLORIA remote sensing instrument payload aboard
                      the new German aircraft HALO. Strongly dehydrated air masses
                      down to 1.6 ppmv of water vapor were observed as far north
                      as 47° S and between 12 and 13 km in altitude, which has
                      never been observed by satellites. The dehydration can be
                      traced back to individual ice formation events, where ice
                      crystals sedimented out and water vapor was irreversibly
                      removed. Within these dehydrated stratospheric air masses,
                      filaments of moister air reaching down to the tropopause are
                      detected with the high resolution limb sounder, GLORIA.
                      Furthermore, dehydrated air masses are observed with GLORIA
                      in the Antarctic troposphere down to 7 km. With the help of
                      a backward trajectory analysis, a tropospheric origin of the
                      moist filaments in the vortex can be identified, while the
                      dry air masses in the troposphere have stratospheric
                      origins. The transport pathways of Antarctic
                      stratosphere/troposphere exchange are investigated and the
                      irrelevant role of the Antarctic thermal tropopause as a
                      transport barrier is confirmed. Further, it is shown that
                      the exchange process can be attributed to several successive
                      Rossby wave events in combination with an isentropic
                      interchange of air masses across the weak tropopause and
                      subsequent subsidence due to radiative cooling. Once
                      transported to the troposphere, air masses with
                      stratospheric origin are able to reach near-surface levels
                      within 1–2 months.},
      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)},
      pid          = {G:(DE-HGF)POF3-244},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.5194/acpd-15-7895-2015},
      url          = {https://juser.fz-juelich.de/record/189264},
}