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@ARTICLE{Brauers:57777,
      author       = {Brauers, T. and Bossmeyer, J. and Dorn, H.-P. and
                      Schlosser, E. and Tillmann, R. and Wegener, R. and Wahner,
                      A.},
      title        = {{I}nvestigation of the formaldehyde differential absorption
                      cross section at high and low spectral resolution in the
                      simulation chamber {SAPHIR}},
      journal      = {Atmospheric chemistry and physics},
      volume       = {7},
      issn         = {1680-7316},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {PreJuSER-57777},
      pages        = {3579 - 3586},
      year         = {2007},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {The results from a simulation chamber study on the
                      formaldehyde (HCHO) absorption cross section in the UV
                      spectral region are presented. We performed 4 experiments at
                      ambient HCHO concentrations with simultaneous measurements
                      of two DOAS instruments in the atmosphere simulation chamber
                      SAPHIR in Jalich. The two instruments differ in their
                      spectral resolution, one working at 0.2 nm (broad-band,
                      BB-DOAS), the other at 2.7 pm (high-resolution, HR-DOAS).
                      Both instruments use dedicated multi reflection cells to
                      achieve long light path lengths of 960 m and 2240 m,
                      respectively, inside the chamber. During two experiments
                      HCHO was injected into the clean chamber by thermolysis of
                      well defined amounts of para-formaldehyde reaching mixing
                      rations of 30 ppbV at maximum. The HCHO concentration
                      calculated from the injection and the chamber volume agrees
                      with the BB-DOAS measured value when the absorption cross
                      section of Meller and Moortgat (2000) and the temperature
                      coefficient of Cantrell (1990) were used for data
                      evaluation. In two further experiments we produced HCHO
                      in-situ from the ozone + ethene reaction which was intended
                      to provide an independent way of HCHO calibration through
                      the measurements of ozone and ethene. However, we found an
                      unexpected deviation from the current understanding of the
                      ozone + ethene reaction when CO was added to suppress
                      possible oxidation of ethene by OH radicals. The reaction of
                      the Criegee intermediate with CO could be 240 times slower
                      than currently assumed. Based on the BB-DOAS measurements we
                      could deduce a high-resolution cross section for HCHO which
                      was not measured directly so far.},
      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:000248733000014},
      doi          = {10.5194/acp-7-3579-2007},
      url          = {https://juser.fz-juelich.de/record/57777},
}