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@ARTICLE{Washenfelder:3832,
      author       = {Washenfelder, R.A. and Langford, A.O. and Fuchs, H. and
                      Brown, S.S.},
      title        = {{M}easurement of glyoxal using an incoherent broadband
                      cavity enhanced absorption spectrometer},
      journal      = {Atmospheric chemistry and physics},
      volume       = {8},
      issn         = {1680-7316},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {PreJuSER-3832},
      pages        = {7779 - 7793},
      year         = {2008},
      note         = {We thank Karl Feierabend for his assistance in synthesizing
                      glyoxal. We thank Rich McLaughlin for machining custom
                      mirror mounts for the IBBCEAS instrument. We thank Susan
                      Solomon for the loan of the InSpectrum 150. We thank Rainer
                      Volkamer and Bill Dube for useful discussions. RAW
                      acknowledges support from the National Research Council
                      Research Associateship Program. This work was funded in part
                      by NOAA's Health of the Atmosphere and Atmospheric Chemistry
                      and Climate programs.},
      abstract     = {We describe an instrument for simultaneous measurements of
                      glyoxal (CHOCHO) and nitrogen dioxide (NO2) using cavity
                      enhanced absorption spectroscopy with a broadband light
                      source. The output of a Xenon arc lamp is coupled into a 1m
                      optical cavity, and the spectrum of light exiting the cavity
                      is recorded by a grating spectrometer with a charge-coupled
                      device (CCD) array detector. The mirror reflectivity and
                      effective path lengths are determined from the known
                      Rayleigh scattering of He and dry zero air (N-2+O-2).
                      Least-squares fitting, using published reference spectra,
                      allow the simultaneous retrieval of CHOCHO, NO2, O-4, and
                      H2O in the 441 to 469 nm spectral range. For a 1-min
                      sampling time, the precision (+/- 1 sigma) on signal for
                      measurements of CHOCHO and NO2 is 29 pptv and 20 pptv,
                      respectively. We directly compare measurements made with the
                      incoherent broadband cavity enhanced absorption spectrometer
                      with those from cavity ringdown instruments detecting CHOCHO
                      and NO2 at 404 and 532 nm, respectively, and find linear
                      agreement over a wide range of concentrations. The
                      instrument has been tested in the laboratory with both
                      synthetic and real air samples, and the demonstrated
                      sensitivity and specificity suggest a strong potential for
                      field measurements of both CHOCHO and NO2.},
      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:000262411800033},
      url          = {https://juser.fz-juelich.de/record/3832},
}