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SIMULATIONS NUMERIQUES DE L'ATMOSPHERE URBAINE AVEC LE MODELE SUBMESO :
APPLICATION A LA CAMPAGNE CLU-ESCOMPTE SUR L'AGGLOMERATION DE MARSEILLE

Abstract : In view of understanding and forecasting pollutant dispersion in urban areas, high resolution numerical simulations are performed. The aim is to reproduce atmospheric characteristics above complex urbanised site. An accurate method is developed to implement numerical simulations of the urban atmosphere based on three complementary tools, optimized on Marseille agglomeration example: the atmospheric Large Eddy Simulation model SUBMESO and the soil model for sub-meso scales, urban, SM2-U, and the DFMap software to map the morphological characteristics of urban fabrics. In order to simulate the atmosphere of coastal cities, a method to compute the fluxes at the sea - atmosphere interface is developing developed and validated. A sensitivity study is then carried on an academic configuration of a city and its rural and/or coastal environment, based on twelve simulations, in order to evaluate the retroactions of the soil and atmospheric models. Five other simulations of the Marseille area are performed with three nested grids during an intense observation period of the UBL – ESCOMPTE experimental campaign, allowing the first validation of the SUBMESO – SM2-U couple, an analysis of the interactions between the city, the breeze systems and the topography, and also very high resolution study of turbulent parameters. This method may be used to study the air quality of other urban areas.
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https://tel.archives-ouvertes.fr/tel-00128672
Contributor : Sylvie Leroyer <>
Submitted on : Friday, February 2, 2007 - 10:49:37 AM
Last modification on : Thursday, January 11, 2018 - 6:17:20 AM
Long-term archiving on: : Wednesday, April 7, 2010 - 2:37:13 AM

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  • HAL Id : tel-00128672, version 1

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Sylvie Leroyer. SIMULATIONS NUMERIQUES DE L'ATMOSPHERE URBAINE AVEC LE MODELE SUBMESO :
APPLICATION A LA CAMPAGNE CLU-ESCOMPTE SUR L'AGGLOMERATION DE MARSEILLE. Océan, Atmosphère. Ecole Centrale de Nantes (ECN); Université de Nantes, 2006. Français. ⟨tel-00128672⟩

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