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@ARTICLE{Bohn:44368,
      author       = {Bohn, B. and Zilken, H.},
      title        = {{M}odel-aided radiometric determination of photolysis
                      frequencies in a sunlit atmosphere simulation chamber},
      journal      = {Atmospheric chemistry and physics},
      volume       = {5},
      issn         = {1680-7316},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {PreJuSER-44368},
      pages        = {191 - 206},
      year         = {2005},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {In this work diurnal and seasonal variations of mean
                      photolysis frequencies for the atmosphere simulation chamber
                      SAPHIR at Forschungszentrum Julich are calculated. SAPHIR
                      has a complex construction with UV permeable teflon walls
                      allowing natural sunlight to enter the reactor volume. The
                      calculations are based on external measurements of solar
                      spectral actinic flux and a model considering the
                      time-dependent impact of shadows from construction elements
                      as well as the influence of the teflon walls. Overcast and
                      clear-sky conditions are treated in a consistent way and
                      different assumptions concerning diffuse sky radiance
                      distributions are tested. Radiometric measurements inside
                      the chamber are used for an inspection of model predictions.
                      Under overcast conditions we obtain fractions of 0.74 and
                      0.67 of external values for photolysis frequencies j(NO2)
                      (NO2+hnu-->NO+O(P-3)) and j((OD)-D-1) (O-3+hnu-->O-2+
                      O(D-1)), respectively. On a clear sky summer day these
                      values are time-dependent within ranges 0.65-0.86 and
                      0.60-0.73, for j(NO2) and j ((OD)-D-1), respectively. A
                      succeeding paper (Bohn et al., 2004) is dealing with an
                      on-road test of the model approach by comparison with
                      photolysis frequencies from chemical actinometry experiments
                      within SAPHIR.},
      keywords     = {J (WoSType)},
      cin          = {ICG-II / ZAM},
      ddc          = {550},
      cid          = {I:(DE-Juel1)VDB48 / I:(DE-Juel1)VDB62},
      pnm          = {Betrieb und Weiterentwicklung des Höchstleistungsrechners
                      / Chemie und Dynamik der Geo-Biosphäre},
      pid          = {G:(DE-Juel1)FUEK254 / G:(DE-Juel1)FUEK257},
      shelfmark    = {Meteorology $\&$ Atmospheric Sciences},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000226562100001},
      url          = {https://juser.fz-juelich.de/record/44368},
}