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@ARTICLE{Bohn:1445,
      author       = {Bohn, B. and Corlett, G.K. and Gillmann, M. and Sanghavi,
                      S. and Stange, G. and Tensing, E. and Vrekoussis, M. and
                      Bloss, W. J. and Clapp, L.J. and Kortner, M. and Dorn, H.-P.
                      and Monks, P. S. and Platt, U. and Plass-Dülmer, C. and
                      Mihalopoulos, N. and Heard, D. E. and Clemitshaw, K. C. and
                      Meixner, F. X. and Prevot, A. S. H. and Schmitt, R.},
      title        = {{P}hotolysis frequency measurement techniques: results of a
                      comparison within the {ACCENT} project},
      journal      = {Atmospheric chemistry and physics},
      volume       = {8},
      issn         = {1680-7316},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {PreJuSER-1445},
      pages        = {5373 - 5391},
      year         = {2008},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {An intercomparison of different radiometric techniques
                      measuring atmospheric photolysis frequencies j(NO2), j(HCHO)
                      and j((OD)-D-1) was carried out in a two-week field campaign
                      in June 2005 at Julich. Germany. Three double-monochromator
                      based spectroradiometers (DM-SR), three single-monochromator
                      based spectroradiometers with diode-array detectors (SM-SR)
                      and seventeen filter radiometers (FR) (ten j(NO2))-FR, seven
                      j((OD)-D-1)-FR) took part in this comparison. For j(NO2),
                      all spectroradiometer results agreed within +/- $3\%.$ For
                      j(HCHO), agreement was slightly poorer between $-8\%$ and
                      $+4\%$ of the DM-SR reference result. For the SM-SR
                      deviations were explained by poorer spectral resolutions and
                      lower accuracies caused by decreased sensitivities of the
                      photodiode arrays in a wave-length range below 350 nm. For
                      j((OD)-D-1), the results were more complex within $+8\%$ and
                      $-4\%$ with increasing deviations towards larger solar
                      zenith angles for the SM-SR. The direction and the magnitude
                      of the deviations were dependent on the technique of
                      background determination. All j(NO2))-FR showed good
                      linearity with sing-le calibration factors being sufficient
                      to convert from output voltages to j(NO2)). Measurements
                      were feasible until sunset and comparison with previous
                      calibrations showed good long-term stability. For the
                      j((OD)-D-1)-FR, conversion from output voltages to
                      j((OD)-D-1) needed calibration factors and correction
                      functions considering the influences of total ozone column
                      and elevation of the sun. All instruments showed good
                      linearity at photolysis frequencies exceeding about $10\%$
                      of maximum values. At larger solar zenith angles, the
                      agreement was non-uniform with deviations explainable by
                      insufficient correction functions. Comparison with previous
                      calibrations for sonic J((OD)-D-1)-FR indicated drifts of
                      calibration factors.},
      keywords     = {J (WoSType)},
      cin          = {ICG-2},
      ddc          = {550},
      cid          = {I:(DE-Juel1)VDB791},
      pnm          = {Atmosphäre und Klima},
      pid          = {G:(DE-Juel1)FUEK406},
      shelfmark    = {Meteorology $\&$ Atmospheric Sciences},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000259221400020},
      doi          = {10.5194/acp-8-5373-2008},
      url          = {https://juser.fz-juelich.de/record/1445},
}