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Etude de la couche limite atmosphérique côtière durant ESCOMPTE 2001. Evaluation et amélioration des performances d'un radar UHF.

Abstract : Forecasting of pollution events was the main objective of the ESCOMPTE-2001 campaign, which took place in the Marseille/Fos/Berre heterogeneous area (southeastern France) in the early summer 2001. This goal requires good understanding and taking into account, by physico-chemical numerical models, of the physical processes in the Atmospheric Boundary Layer (ABL), in which pollutants are emitted, transported and diffused.
In the ESCOMPTE-2001 campaign context, this work was devoted to study the low troposphere during sea breeze events, related to meteorological conditions responsible for poor air quality of coastal areas. It presents notably an oscillation of the sea breeze intensity and competitions of locals and regional sea breeze, which change the advected time of the marine air above the continental surface and thus influence the ABL development and its pollutants concentration. This study is based principally on the network of four UHF wind profilers radars set up on the coastal area of Marseille/Fos/Berre, allowing a continuous three-dimensional description of the sea breeze flow and the ABL.
For the needs of this phenomenological work, methodological developments was realized to improve the measurement of ABL turbulent properties with UHF radars (terms of turbulent kinetic energy budget) and the use of wind profilers network for the study of pollutants plumes trajectography.
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Vincent Puygrenier. Etude de la couche limite atmosphérique côtière durant ESCOMPTE 2001. Evaluation et amélioration des performances d'un radar UHF.. Océan, Atmosphère. Université Paul Sabatier - Toulouse III, 2005. Français. ⟨tel-00011691⟩

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