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Absorption cross-sections of NO2: Simulation of temperature and pressure effects

par Vandaele, Ann Carine ;Hermans, Christian ;Fally, Sophie ;Carleer, Michel ;Merienne, Marie-France;Jenouvrier, Alain;Coquart, Bernard;Colin, Réginald
Référence Journal of Quantitative Spectroscopy & Radiative Transfer, 76, 3-4, page (373-391)
Publication Publié, 2003-02

Article révisé par les pairs

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Résumé :

The measurements of the NO2 absorption cross sections by several authors have been considered in order to derive its temperature and pressure dependences in the 13 200-42 000 cm-1 spectral range. The temperature dependence is assumed to be linear in the temperature range investigated (217.0-298.5 K), whereas the influence of the total pressure is expressed as a temperature-dependent broadening coefficient. From measurements performed with mixtures of NO2 in air and in N2, values of γ0air (296 K) and γ0N2 (296 K) were found to be, respectively, 0.081 ± 0.002 and 0.069 ± 0.003 cm-1 atm-1. The temperature coefficient n obtained in the present work is 0.8 ± 0.1. The parameterization of the cross sections developed in this work can reproduce measured cross sections within 4%.