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@ARTICLE{Haag:30388,
      author       = {Haag, W. and Kärcher, B. and Schaefers, S. and Stetzer, O.
                      and Möhler, O. and Schurath, U. and Krämer, M. and
                      Schiller, C.},
      title        = {{N}umerical simulations of homogeneous freezing processes
                      in the aerosol chamber {AIDA}},
      journal      = {Atmospheric chemistry and physics},
      volume       = {3},
      issn         = {1680-7316},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {PreJuSER-30388},
      pages        = {195 - 210},
      year         = {2003},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {The homogeneous freezing of supercooled H2SO4/H2O aerosols
                      in an aerosol chamber is investigated with a microphysical
                      box model using the activity parameterization of the
                      nucleation rate by Koop et al. (2000). The simulations are
                      constrained by measurements of pressure, temperature, total
                      water mixing ratio, and the initial aerosol size
                      distribution, described in a companion paper (Mohler et al.,
                      2003). Model results are compared to measurements conducted
                      in the temperature range between 194 and 235 K, with cooling
                      rates in the range between 0.5 and 2.6 K min(-1), and at air
                      pressures between 170 and 1000 hPa. The simulations focus on
                      the time history of relative humidity with respect to ice,
                      aerosol size distribution, partitioning of water between gas
                      and particle phase, onset times of freezing, freezing
                      threshold relative humidities, aerosol chemical composition
                      at the onset of freezing, and the number of nucleated ice
                      crystals. The latter four parameters can be inferred from
                      the experiments, the former three aid in interpreting the
                      measurements. Sensitivity studies are carried out to address
                      the relative importance of uncertainties of basic quantities
                      such as temperature, total H2O mixing ratio, aerosol size
                      spectrum, and deposition coefficient of H2O molecules on
                      ice. The ability of the numerical simulations to provide
                      detailed explanations of the observations greatly increases
                      confidence in attempts to model this process under real
                      atmospheric conditions, for instance with regard to the
                      formation of cirrus clouds or polar stratospheric ice
                      clouds, provided that accurate temperature and humidity
                      measurements are available.},
      keywords     = {J (WoSType)},
      cin          = {ICG-I},
      ddc          = {550},
      cid          = {I:(DE-Juel1)VDB47},
      pnm          = {Chemie und Dynamik der Geo-Biosphäre},
      pid          = {G:(DE-Juel1)FUEK257},
      shelfmark    = {Meteorology $\&$ Atmospheric Sciences},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000181074900001},
      url          = {https://juser.fz-juelich.de/record/30388},
}