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Transport et mélange en terrain complexe, application à la dynamique atmosphérique dans les vallées encaissées

Abstract : Mountainous terrain modify the atmospheric boundary layer (ABL) structure and its evolution in comparison to flat terrain and consequently affect the transport and mixing of pollutants. The present study attempts to understand the atmosphere structure evolution (particularly the ABL) using observations and numerical simulations. To proceed, data sets from the POVA program, devoted to air quality in alpine valleys, are analyzed. A large-eddy simulation model is also adapted (and evaluated using the experimental data). Vertical exchange processes coupling the ABL with the free atmosphere aloft are then detailed over flat terrain. Results of this study enable us to characterize and quantify the specific features of valley flows and the entrainment mechanisms at the top of the ABL over flat terrain.
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https://tel.archives-ouvertes.fr/tel-00011306
Contributor : Charles Chemel <>
Submitted on : Thursday, January 5, 2006 - 5:22:33 PM
Last modification on : Tuesday, July 27, 2021 - 11:00:09 AM
Long-term archiving on: : Saturday, April 3, 2010 - 8:55:14 PM

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  • HAL Id : tel-00011306, version 1

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Charles Chemel. Transport et mélange en terrain complexe, application à la dynamique atmosphérique dans les vallées encaissées. Océan, Atmosphère. Université Joseph-Fourier - Grenoble I, 2005. Français. ⟨tel-00011306⟩

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