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@ARTICLE{Engel:156007,
      author       = {Engel, I. and Luo, B. P. and Khaykin, S. M. and Wienhold,
                      F. G. and Vömel, H. and Kivi, R. and Hoyle, C. R. and
                      Grooß, J.-U. and Pitts, M. C. and Peter, T.},
      title        = {{A}rctic stratospheric dehydration – {P}art 2:
                      {M}icrophysical modeling},
      journal      = {Atmospheric chemistry and physics},
      volume       = {14},
      number       = {7},
      issn         = {1680-7324},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {FZJ-2014-04922},
      pages        = {3231 - 3246},
      year         = {2014},
      abstract     = {Large areas of synoptic-scale ice PSCs (polar stratospheric
                      clouds) distinguished the Arctic winter 2009/2010 from other
                      years and revealed unprecedented evidence of water
                      redistribution in the stratosphere. A unique snapshot of
                      water vapor repartitioning into ice particles was obtained
                      under extremely cold Arctic conditions with temperatures
                      around 183 K. Balloon-borne, aircraft and satellite-based
                      measurements suggest that synoptic-scale ice PSCs and
                      concurrent reductions and enhancements in water vapor are
                      tightly linked with the observed de- and rehydration
                      signatures, respectively. In a companion paper (Part 1),
                      water vapor and aerosol backscatter measurements from the
                      RECONCILE (Reconciliation of essential process parameters
                      for an enhanced predictability of Arctic stratospheric ozone
                      loss and its climate interactions) and LAPBIAT-II (Lapland
                      Atmosphere–Biosphere Facility) field campaigns have been
                      analyzed in detail. This paper uses a column version of the
                      Zurich Optical and Microphysical box Model (ZOMM) including
                      newly developed NAT (nitric acid trihydrate) and ice
                      nucleation parameterizations. Particle sedimentation is
                      calculated in order to simulate the vertical redistribution
                      of chemical species such as water and nitric acid. Despite
                      limitations given by wind shear and uncertainties in the
                      initial water vapor profile, the column modeling
                      unequivocally shows that (1) accounting for small-scale
                      temperature fluctuations along the trajectories is essential
                      in order to reach agreement between simulated optical cloud
                      properties and observations, and (2) the use of recently
                      developed heterogeneous ice nucleation parameterizations
                      allows the reproduction of the observed signatures of de-
                      and rehydration. Conversely, the vertical redistribution of
                      water measured cannot be explained in terms of homogeneous
                      nucleation of ice clouds, whose particle radii remain too
                      small to cause significant dehydration.},
      cin          = {IEK-7},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-7-20101013},
      pnm          = {234 - Composition and Dynamics of the Upper Troposphere and
                      Stratosphere (POF2-234)},
      pid          = {G:(DE-HGF)POF2-234},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000334608400005},
      doi          = {10.5194/acp-14-3231-2014},
      url          = {https://juser.fz-juelich.de/record/156007},
}