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Simulations numériques méso- et micro-échelles des circulations locales générées par des îles tropicales : cas de l’archipel de la Guadeloupe avec une application à la dispersion de polluants (WRF-LES-FLEXPART)

Abstract : Meteorological phenomena with scales lower than hurricanes, from extreme rainfalls to pollution peaks, represent important environmental and health risks in the Caribbean. These examples show the need to downscale large-scale meteorological data to island-scale fields. The main goal of the present numerical study is the analysis of the meso- and micro-scale mechanisms inducing diurnal and nocturnal circulations in the Guadeloupe archipelago. The Weather Research and Forecasting model is employed. The micro-scale results are obtained by the coupling of the 1-km simulated fields and the Large Eddy Simulation method. Then, in order to analyze the dispersion of a pollutants plume, the micro-scale outputs with 111 m of resolution are used to force the lagrangian particles dispersion model FLEXPART. The study has been conducted for three real cases of weather types linked with strong, medium and weak trade winds. The results of simulations, validated with available observed data, permitted to simulate all local circulations, including a nocturnal counter-current flow which may induce a pollution peak in the urban area of Pointe-à-Pitre city. These works, which may be applied to other Lesser Antilles islands, suggest many environmental and energy applications.
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https://hal.archives-ouvertes.fr/tel-01074600
Contributor : Raphaël Cécé <>
Submitted on : Tuesday, October 14, 2014 - 9:22:34 PM
Last modification on : Tuesday, January 8, 2019 - 12:02:04 PM
Document(s) archivé(s) le : Thursday, January 15, 2015 - 10:46:17 AM

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  • HAL Id : tel-01074600, version 1

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Raphaël Cécé. Simulations numériques méso- et micro-échelles des circulations locales générées par des îles tropicales : cas de l’archipel de la Guadeloupe avec une application à la dispersion de polluants (WRF-LES-FLEXPART). Météorologie. Université des Antilles et de la Guyane, 2014. Français. ⟨tel-01074600⟩

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