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Intercomparison of slant column measurements of NO2 and O4 by MAX-DOAS and zenith-sky UV and visible spectrometers
Intercomparison of slant column measurements of NO2 and O4 by MAX-DOAS and zenith-sky UV and visible spectrometers
In June 2009, 22 spectrometers from 14 institutes measured tropospheric and stratospheric NO2 from the ground for more than 11 days during the Cabauw Intercomparison Campaign of Nitrogen Dioxide measuring Instruments (CINDI), at Cabauw, NL (51.97° N, 4.93° E). All visible instruments used a common wavelength range and set of cross sections for the spectral analysis. Most of the instruments were of the multi-axis design with analysis by differential spectroscopy software (MAX-DOAS), whose non-zenith slant columns were compared by examining slopes of their least-squares straight line fits to mean values of a selection of instruments, after taking 30-min averages. Zenith slant columns near twilight were compared by fits to interpolated values of a reference instrument, then normalised by the mean of the slopes of the best instruments. For visible MAX-DOAS instruments, the means of the fitted slopes for NO2 and O4 of all except one instrument were within 10% of unity at almost all non-zenith elevations, and most were within 5%. Values for UV MAX-DOAS instruments were almost as good, being 12% and 7%, respectively. For visible instruments at zenith near twilight, the means of the fitted slopes of all instruments were within 5% of unity. This level of agreement is as good as that of previous intercomparisons, despite the site not being ideal for zenith twilight measurements. It bodes well for the future of measurements of tropospheric NO2, as previous intercomparisons were only for zenith instruments focussing on stratospheric NO2, with their longer heritage.
- University of Toronto Canada
- Washington State University United States
- University of Maryland, Baltimore United States
- Max Planck Institute for Heart and Lung Research Germany
- NIWA New Zealand
2012
Bogumil, K., Orphal, J., Homann, T., Voigt, S., Spietz, P., Fleischmann, O. C., Vogel, A., Hartmann, M., Bovensmann, H., Frerik, J., and Burrows, J. P.: Measurements of molecular absorption spectra with the SCIAMACHY Pre-Flight Model: Instrument characterization and reference spectra for atmospheric remote sensing in the 230-2380 nm region, J. Photochem. Photobiol. A., 157, 167-184, 2003.
Brinksma, E. J., Pinardi, G., Volten, H., Braak, R., Richter, A., Schonhardt, A., van Roozendael, M., Fayt, C., Hermans, C., Dirksen, R. J., Vlemmix, T., Berkhout, A. J. C., Swart, D. P. J., Oetjen, H., Wittrock, F., Wagner, T., Ibrahim, O. W., de Leeuw, G., Moerman, M., Curier, R. L., Celarier, E. A., Cede, A., Knap, W. H., Veefkind, J. P., Eskes, H. J., Allaart, M., Rothe, R., Piters, A. J. M., and Levelt, P. F.: The 2005 and 2006 DANDELIONS NO2 and Aerosol Intercomparison Campaigns, J. Geophys. Res., 113, D16S46, doi:10.1029/2007JD008808, 2008. [OpenAIRE]
Brewer, A. W., McElroy, C. T., and Kerr, J. B.: Nitrogen dioxide concentrations in the atmosphere, Nature, 246, 129-133, 1973. [OpenAIRE]
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Hains, J. C., Boersma, K. F., Kroon, M., Dirksen, R. J., Cohen, R. C., Perring, A. E., Bucsela, E., Volten, H., Swart, D. P. J., Richter, A., Wittrock, F., Schoenhardt, A., Wagner, T., Ibrahim, O. W., Van Roozendael, M., Pinardi, G., Gleason, J. F., Veefkind, J. P., and Levelt, P.: Testing and improving OMI DOMINO tropospheric NO2 using observations from the DANDELIONS and INTEX-B validation campaigns, J. Geophys. Res., 115, D05301, doi:10.1029/2009JD012399, 2010.
Hofmann, D. J., Bonasoni, P., De Maziere, M., Evangelisti, F., Giovanelli, G., Goldman, A., Goutail, F., Harder, J., Jakoubek, R., Johnston, P. V., Kerr, J. E., Matthews, W. A., McElroy, C. T., McKenzie, R. L., Mount, G., Platt, U., Pommereau, J-P., Sarkissian, A., Simon, P., Solomon, S., Stutz, J., Thomas, A., Van Roozendael, M., and Wu, E.: Intercomparison of UV/visible spectrometers for measurements of stratospheric NO2 for the network for the detection of stratospheric change, J. Geophys. Res., 100, 16765-16791, 1995.
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Popularity provided by BIP!- University of Toronto Canada
- Washington State University United States
- University of Maryland, Baltimore United States
- Max Planck Institute for Heart and Lung Research Germany
- NIWA New Zealand
- University of Maryland, College Park United States
- Atmospheres Laboratory Environments, Observations Spatiales France
- Gwangju Institute of Science and Technology
- Royal Belgian Institute for Space Aeronomy Belgium
- University of Maryland United States
- Max Planck Institute for Chemistry Germany
- University of Maryland, Baltimore County United States
- Royal Netherlands Meteorological Institute Netherlands
- British Antarctic Survey United Kingdom
- Max Plank Institute for Chemistry (MPIC), Mainz, Germany Germany
- University of Bremen, Institute of Environmental Physics Germany
- Belgian Institute for Space Aeronomy, NDACC Satellite Working Group Belgium
- Heidelberg University Germany
- Gwangju Institute of Science and Technology Korea (Republic of)
- Max Planck Society Germany
- Belgian Institute for Space Aeronomy Belgium
- University of Leicester United Kingdom
- KNMI Netherlands
- National Institute for Aerospace Technology Spain
- University of Toronto Canada
- Max Planck Institute for Biophysical Chemistry Germany
- University of Bremen Germany
- University of Leeds United Kingdom
- National Institute of Water and Atmospheric Research New Zealand
In June 2009, 22 spectrometers from 14 institutes measured tropospheric and stratospheric NO2 from the ground for more than 11 days during the Cabauw Intercomparison Campaign of Nitrogen Dioxide measuring Instruments (CINDI), at Cabauw, NL (51.97° N, 4.93° E). All visible instruments used a common wavelength range and set of cross sections for the spectral analysis. Most of the instruments were of the multi-axis design with analysis by differential spectroscopy software (MAX-DOAS), whose non-zenith slant columns were compared by examining slopes of their least-squares straight line fits to mean values of a selection of instruments, after taking 30-min averages. Zenith slant columns near twilight were compared by fits to interpolated values of a reference instrument, then normalised by the mean of the slopes of the best instruments. For visible MAX-DOAS instruments, the means of the fitted slopes for NO2 and O4 of all except one instrument were within 10% of unity at almost all non-zenith elevations, and most were within 5%. Values for UV MAX-DOAS instruments were almost as good, being 12% and 7%, respectively. For visible instruments at zenith near twilight, the means of the fitted slopes of all instruments were within 5% of unity. This level of agreement is as good as that of previous intercomparisons, despite the site not being ideal for zenith twilight measurements. It bodes well for the future of measurements of tropospheric NO2, as previous intercomparisons were only for zenith instruments focussing on stratospheric NO2, with their longer heritage.