% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Fuchs:13753,
      author       = {Fuchs, H. and Brauers, T. and Dorn, H.-P. and Harder, H.
                      and Häseler, R. and Hofzumahaus, A. and Holland, F. and
                      Kanaya, Y. and Kajii, Y. and Kubistin, D. and Lou, S. and
                      Martinez, M. and Miyamoto, K. and Nishida, S. and Rudolf, M.
                      and Schlosser, E. and Wahner, A. and Yoshino, A. and
                      Schurath, U.},
      title        = {{T}echnical {N}ote: {F}ormal blind intercomparison of {HO}2
                      measurements in the atmosphere simulation chamber {SAPHIR}
                      during the {HO}x{C}omp campaign},
      journal      = {Atmospheric chemistry and physics},
      volume       = {10},
      issn         = {1680-7316},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {PreJuSER-13753},
      pages        = {12233 - 12250},
      year         = {2010},
      note         = {This work was supported by the EU FP-6 program EUROCHAMP
                      (grant no. RII3-CT-2004-505968) and ACCENT (Priority
                      1.1.6.3. Global Change and Ecosystems, grant no.
                      GOCE-CT-2004-505337).},
      abstract     = {Hydroperoxy radical (HO2) concentrations were measured
                      during the formal blind intercomparison campaign HOxComp
                      carried out in Julich, Germany, in 2005. Three instruments
                      detected HO2 via chemical conversion to hydroxyl radicals
                      (OH) and subsequent detection of the sum of OH and HO2 by
                      laser induced fluorescence (LIF). All instruments were based
                      on the same detection and calibration scheme. Because
                      measurements by a MIESR instrument failed during the
                      campaign, no absolute reference measurement was available,
                      so that the accuracy of individual instruments could not be
                      addressed. Instruments sampled ambient air for three days
                      and were attached to the atmosphere simulation chamber
                      SAPHIR during the second part of the campaign. Six
                      experiments of one day each were conducted in SAPHIR, where
                      air masses are homogeneously mixed, in order to investigate
                      the performance of instruments and to determine potential
                      interferences of measurements under well-controlled
                      conditions. Linear correlation coefficients (R-2) between
                      measurements of the LIF instruments are generally high and
                      range from 0.82 to 0.98. However, the agreement between
                      measurements is variable. The regression analysis of the
                      entire data set of measurements in SAPHIR yields slopes
                      between 0.69 to 1.26 and intercepts are smaller than typical
                      atmospheric daytime concentrations (less than 1 pptv). The
                      quality of fit parameters improves significantly, when data
                      are grouped into data subsets of similar water vapor
                      concentrations. Because measurements of LIF instruments were
                      corrected for a well-characterized water dependence of their
                      sensitivities, this indicates that an unknown factor related
                      to water vapor affected measurements in SAPHIR. Measurements
                      in ambient air are also well-correlated, but regression
                      parameters differ from results obtained from SAPHIR
                      experiments. This could have been caused by differences in
                      HO2 concentrations in the sampled air at the slightly
                      different locations of instruments.},
      keywords     = {J (WoSType)},
      cin          = {IEK-8},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-8-20101013},
      pnm          = {Atmosphäre und Klima},
      pid          = {G:(DE-Juel1)FUEK491},
      shelfmark    = {Meteorology $\&$ Atmospheric Sciences},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000285581000013},
      doi          = {10.5194/acp-10-12233-2010},
      url          = {https://juser.fz-juelich.de/record/13753},
}