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Détermination expérimentale de la vitesse de dépôt sec des aérosols submicroniques en milieu naturel : influence de la granulométrie, des paramètres micrométéorologiques et du couvert

Abstract : To evaluate the impact of accidental or chronic pollutant releases on ecosystems, we must study the dry deposition of aerosols in rural areas. The lack of experimental data on the dry deposition velocity of particle sizes below 1 μm over rural environments leads to uncertainties regarding models and differences between them, which exceed one order of magnitude. The aim of thisstudy is to develop a method, especially using an Electrical Low Pressure Impactor (Outdoor ELPI, DEKATI) to determine aerosol dry deposition velocities (Vd) over rural areas through experimental measurements. This method is based on eddy covariance flux calculation and spectral analysis correction. Dry deposition velocities were obtained for atmospheric aerosols sizing from 7 nm to2 μm, in the South-West of France on a flat terrain under varied meteorological conditions andvaried substrates (maize, grass and earth). Vd was analysed as a function of the particle diameters, and the impact of micrometeorological parameters was studied.
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Submitted on : Friday, January 21, 2011 - 11:26:09 AM
Last modification on : Thursday, November 28, 2019 - 3:45:54 AM
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  • HAL Id : tel-00558201, version 1

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Pierre Damay. Détermination expérimentale de la vitesse de dépôt sec des aérosols submicroniques en milieu naturel : influence de la granulométrie, des paramètres micrométéorologiques et du couvert. Autre [cond-mat.other]. INSA de Rouen, 2010. Français. ⟨NNT : 2010ISAM0020⟩. ⟨tel-00558201⟩

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