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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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Volume 3, issue 1 | Copyright
Atmos. Meas. Tech., 3, 21-37, 2010
https://doi.org/10.5194/amt-3-21-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.

  12 Jan 2010

12 Jan 2010

Intercomparison of measurements of NO2 concentrations in the atmosphere simulation chamber SAPHIR during the NO3Comp campaign

H. Fuchs2,1,*, S. M. Ball3, B. Bohn4, T. Brauers4, R. C. Cohen5, H.-P. Dorn4, W. P. Dubé2,1, J. L. Fry5, R. Häseler4, U. Heitmann6, R. L. Jones7, J. Kleffmann8, T. F. Mentel4, P. Müsgen4, F. Rohrer4, A. W. Rollins5, A. A. Ruth9,6, A. Kiendler-Scharr4, E. Schlosser4, A. J. L. Shillings7, R. Tillmann4, R. M. Varma9,6, D. S. Venables9,10, G. Villena Tapia8, A. Wahner4, R. Wegener4, P. J. Wooldridge5, and S. S. Brown1 H. Fuchs et al.
  • 1National Oceanic and Atmospheric Administration, Earth System Research Laboratory, Boulder, CO, USA
  • 2Cooperative Institute for Research in the Environmental Sciences, University of Colorado, Boulder, CO, USA
  • 3Department of Chemistry, University of Leicester, Leicester, UK
  • 4Institut für Chemie und Dynamik der Geosphäre 2, Forschungszentrum Jülich GmbH, Jülich, Germany
  • 5Department of Chemistry, University of California Berkeley, Berkeley, CA, USA
  • 6Department of Physics, University College Cork, Cork, Ireland
  • 7Department of Chemistry, University of Cambridge, Cambridge, UK
  • 8Physikalische Chemie/Fachbereich C, Bergische Universität Wuppertal, Wuppertal, Germany
  • 9Department of Chemistry, University College Cork, Cork, Ireland
  • 10Environmental Research Institute, University College Cork, Cork, Ireland
  • *now at: Institut für Chemie und Dynamik der Geosphäre 2, Forschungszentrum Jülich GmbH, Jülich, Germany

Abstract. NO2 concentrations were measured by various instruments during the NO3Comp campaign at the atmosphere simulation chamber SAPHIR at Forschungszentrum Jülich, Germany, in June 2007. Analytical methods included photolytic conversion with chemiluminescence (PC-CLD), broadband cavity ring-down spectroscopy (BBCRDS), pulsed cavity ring-down spectroscopy (CRDS), incoherent broadband cavity-enhanced absorption spectroscopy (IBB\-CEAS), and laser-induced fluorescence (LIF). All broadband absorption spectrometers were optimized for the detection of the main target species of the campaign, NO3, but were also capable of detecting NO2 simultaneously with reduced sensitivity. NO2 mixing ratios in the chamber were within a range characteristic of polluted, urban conditions, with a maximum mixing ratio of approximately 75 ppbv. The overall agreement between measurements of all instruments was excellent. Linear fits of the combined data sets resulted in slopes that differ from unity only within the stated uncertainty of each instrument. Possible interferences from species such as water vapor and ozone were negligible under the experimental conditions.

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