Caractérisation de la tropopause extratropicale avec les données aéroportées
MOZAIC : zone de mélange et d'échange

Abstract : This thesis aims atMOZAIC data analyses and to improve understanding of Stratosphere-Troposphere Exchange (STE) on case study scale or global scale. The use of Lagrangiantechniques and the mesoscale model MESO-NH underlines importance of STE into a summertimecyclogenesis case study. It characterizes a deep stratospheric intrusion and theimpact of convective mixing across the tropopause on chemical distribution into the UTLSregion. A lagrangian analysis of a second case study shows that frontal zones of midlatitudesare able to layered stratify air masses processed by coherent airstreams. Finally, a studyshows the impact of STE on seasonal distribution of ozone and CO at midlatitudes UTLSregion. A dynamical referential, link to the vertical structure of baroclinic waves, allows acoherent reshape of observations along upper troughs and upper ridges. The mixing layerformation over the tropopause and seasonal chemical variations are shown. A lagrangiananalyses of zonal variations is tented.
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https://tel.archives-ouvertes.fr/tel-00116649
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Submitted on : Monday, November 27, 2006 - 11:53:49 AM
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Jérôme Brioude. Caractérisation de la tropopause extratropicale avec les données aéroportées
MOZAIC : zone de mélange et d'échange. Océan, Atmosphère. Université Paul Sabatier - Toulouse III, 2006. Français. ⟨tel-00116649⟩

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