Comparison of N2O5 mixing ratios during NO3Comp 2007 in SAPHIR

H. Fuchs, W. R. Simpson, R. L. Apodaca, T. Brauers, R. C. Cohen, J. N. Crowley, H. P. Dorn, W. P. Dubé, J. L. Fry, R. Häseler, Y. Kajii, A. Kiendler-Scharr, I. Labazan, Jun Matsumoto, T. F. Mentel, Y. Nakashima, F. Rohrer, A. W. Rollins, G. Schuster, R. Tillmann & 3 others A. Wahner, P. J. Wooldridge, S. S. Brown

    Research output: Contribution to journalArticle

    13 Citations (Scopus)

    Abstract

    N2O5 detection in the atmosphere has been accomplished using techniques which have been developed during the last decade. Most techniques use a heated inlet to thermally decompose N2O 5 to NO3, which can be detected by either cavity based absorption at 662 nm or by laser-induced fluorescence. In summer 2007, a large set of instruments, which were capable of measuring NO3 mixing ratios, were simultaneously deployed in the atmosphere simulation chamber SAPHIR in Jülich, Germany. Some of these instruments measured N2O 5 mixing ratios either simultaneously or alternatively. Experiments focused on the investigation of potential interferences from, e.g., water vapour or aerosol and on the investigation of the oxidation of biogenic volatile organic compounds by NO3. The comparison of N2O 5 mixing ratios shows an excellent agreement between measurements of instruments applying different techniques (3 cavity ring-down (CRDS) instruments, 2 laser-induced fluorescence (LIF) instruments). Datasets are highly correlated as indicated by the square of the linear correlation coefficients, R2, which values were larger than 0.96 for the entire datasets. N2O5 mixing ratios well agree within the combined accuracy of measurements. Slopes of the linear regression range between 0.87 and 1.26 and intercepts are negligible. The most critical aspect of N 2O5 measurements by cavity ring-down instruments is the determination of the inlet and filter transmission efficiency. Measurements here show that the N2O5 inlet transmission efficiency can decrease in the presence of high aerosol loads, and that frequent filter/inlet changing is necessary to quantitatively sample N2O5 in some environments. The analysis of data also demonstrates that a general correction for degrading filter transmission is not applicable for all conditions encountered during this campaign. Besides the effect of a gradual degradation of the inlet transmission efficiency aerosol exposure, no other interference for N2O5 measurements is found.

    Original languageEnglish
    Pages (from-to)2763-2777
    Number of pages15
    JournalAtmospheric Measurement Techniques
    Volume5
    Issue number11
    DOIs
    Publication statusPublished - 2012

    Fingerprint

    mixing ratio
    cavity
    laser induced fluorescence
    aerosol
    filter
    atmosphere
    volatile organic compound
    water vapor
    oxidation
    degradation
    comparison
    summer
    simulation
    experiment

    ASJC Scopus subject areas

    • Atmospheric Science

    Cite this

    Fuchs, H., Simpson, W. R., Apodaca, R. L., Brauers, T., Cohen, R. C., Crowley, J. N., ... Brown, S. S. (2012). Comparison of N2O5 mixing ratios during NO3Comp 2007 in SAPHIR. Atmospheric Measurement Techniques, 5(11), 2763-2777. https://doi.org/10.5194/amt-5-2763-2012

    Comparison of N2O5 mixing ratios during NO3Comp 2007 in SAPHIR. / Fuchs, H.; Simpson, W. R.; Apodaca, R. L.; Brauers, T.; Cohen, R. C.; Crowley, J. N.; Dorn, H. P.; Dubé, W. P.; Fry, J. L.; Häseler, R.; Kajii, Y.; Kiendler-Scharr, A.; Labazan, I.; Matsumoto, Jun; Mentel, T. F.; Nakashima, Y.; Rohrer, F.; Rollins, A. W.; Schuster, G.; Tillmann, R.; Wahner, A.; Wooldridge, P. J.; Brown, S. S.

    In: Atmospheric Measurement Techniques, Vol. 5, No. 11, 2012, p. 2763-2777.

    Research output: Contribution to journalArticle

    Fuchs, H, Simpson, WR, Apodaca, RL, Brauers, T, Cohen, RC, Crowley, JN, Dorn, HP, Dubé, WP, Fry, JL, Häseler, R, Kajii, Y, Kiendler-Scharr, A, Labazan, I, Matsumoto, J, Mentel, TF, Nakashima, Y, Rohrer, F, Rollins, AW, Schuster, G, Tillmann, R, Wahner, A, Wooldridge, PJ & Brown, SS 2012, 'Comparison of N2O5 mixing ratios during NO3Comp 2007 in SAPHIR', Atmospheric Measurement Techniques, vol. 5, no. 11, pp. 2763-2777. https://doi.org/10.5194/amt-5-2763-2012
    Fuchs H, Simpson WR, Apodaca RL, Brauers T, Cohen RC, Crowley JN et al. Comparison of N2O5 mixing ratios during NO3Comp 2007 in SAPHIR. Atmospheric Measurement Techniques. 2012;5(11):2763-2777. https://doi.org/10.5194/amt-5-2763-2012
    Fuchs, H. ; Simpson, W. R. ; Apodaca, R. L. ; Brauers, T. ; Cohen, R. C. ; Crowley, J. N. ; Dorn, H. P. ; Dubé, W. P. ; Fry, J. L. ; Häseler, R. ; Kajii, Y. ; Kiendler-Scharr, A. ; Labazan, I. ; Matsumoto, Jun ; Mentel, T. F. ; Nakashima, Y. ; Rohrer, F. ; Rollins, A. W. ; Schuster, G. ; Tillmann, R. ; Wahner, A. ; Wooldridge, P. J. ; Brown, S. S. / Comparison of N2O5 mixing ratios during NO3Comp 2007 in SAPHIR. In: Atmospheric Measurement Techniques. 2012 ; Vol. 5, No. 11. pp. 2763-2777.
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    abstract = "N2O5 detection in the atmosphere has been accomplished using techniques which have been developed during the last decade. Most techniques use a heated inlet to thermally decompose N2O 5 to NO3, which can be detected by either cavity based absorption at 662 nm or by laser-induced fluorescence. In summer 2007, a large set of instruments, which were capable of measuring NO3 mixing ratios, were simultaneously deployed in the atmosphere simulation chamber SAPHIR in J{\"u}lich, Germany. Some of these instruments measured N2O 5 mixing ratios either simultaneously or alternatively. Experiments focused on the investigation of potential interferences from, e.g., water vapour or aerosol and on the investigation of the oxidation of biogenic volatile organic compounds by NO3. The comparison of N2O 5 mixing ratios shows an excellent agreement between measurements of instruments applying different techniques (3 cavity ring-down (CRDS) instruments, 2 laser-induced fluorescence (LIF) instruments). Datasets are highly correlated as indicated by the square of the linear correlation coefficients, R2, which values were larger than 0.96 for the entire datasets. N2O5 mixing ratios well agree within the combined accuracy of measurements. Slopes of the linear regression range between 0.87 and 1.26 and intercepts are negligible. The most critical aspect of N 2O5 measurements by cavity ring-down instruments is the determination of the inlet and filter transmission efficiency. Measurements here show that the N2O5 inlet transmission efficiency can decrease in the presence of high aerosol loads, and that frequent filter/inlet changing is necessary to quantitatively sample N2O5 in some environments. The analysis of data also demonstrates that a general correction for degrading filter transmission is not applicable for all conditions encountered during this campaign. Besides the effect of a gradual degradation of the inlet transmission efficiency aerosol exposure, no other interference for N2O5 measurements is found.",
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    AU - Fuchs, H.

    AU - Simpson, W. R.

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    AU - Brauers, T.

    AU - Cohen, R. C.

    AU - Crowley, J. N.

    AU - Dorn, H. P.

    AU - Dubé, W. P.

    AU - Fry, J. L.

    AU - Häseler, R.

    AU - Kajii, Y.

    AU - Kiendler-Scharr, A.

    AU - Labazan, I.

    AU - Matsumoto, Jun

    AU - Mentel, T. F.

    AU - Nakashima, Y.

    AU - Rohrer, F.

    AU - Rollins, A. W.

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