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    High-resolution Fourier transform measurement of the NO2 visible and near-infrared absorption cross sections: Temperature and pressure effects

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    Authors
    Vandaele, A.C.
    Hermans, C.
    Fally, S.
    Carleer, M.
    Colin, R.
    Mérienne, M.-F.
    Jenouvrier, A.
    Coquart, B.
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    Discipline
    Earth and related Environmental sciences
    Subject
    Fourier transform infrared spectroscopy
    Gas absorption
    Nitrogen oxides
    Numerical methods
    Pressure effects
    Reflection
    Regression analysis
    absorption
    geophysics
    infrared radiation
    spectrometer
    Audience
    Scientific
    Date
    2002
    Metadata
    Show full item record
    Description
    High-resolution NO2 absorption cross sections have been obtained in the near-IR (NIR) and visible regions using a Fourier transform spectrometer coupled to a multiple reflection cell. Spectra were recorded at 0.05 cm-1 in the NIR region (10,800-15,100 cm-1) and at 0.1 cm-1 in the visible region (13,800-26,000 cm-1), under various pressure conditions (pure NO2 and NO2/air mixtures) and at three temperatures (220, 240, and 294 K). The effects of the temperature and the pressure on the NO2 cross sections have been investigated. As expected, an increase of temperature results in a decrease of the absorption at the maxima of the absorption bands and an increase at the minima. From the measurements performed with pure NO2 at different temperatures a linear regression of the cross section with temperature has been carried out. This enabled the cross sections to be reproduced within 2% at room temperature and 7% at the lower temperatures. The variation of the cross sections with the total pressure of NO2/air mixtures has also been investigated at high resolution.
    Citation
    Vandaele, A.C.; Hermans, C.; Fally, S.; Carleer, M.; Colin, R.; Mérienne, M.-F.; Jenouvrier, A.; Coquart, B. (2002). High-resolution Fourier transform measurement of the NO2 visible and near-infrared absorption cross sections: Temperature and pressure effects. , Journal of Geophysical Research: Atmospheres, Vol. 107, Issue 18, A4348, DOI: 10.1029/2001JD000971.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/5218
    doi: http://dx.doi.org/10.1029/2001JD000971
    scopus: 2-s2.0-33646501918
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
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