Couche limite atmosphérique par condition stable hivernale en vallée alpine : mesures in situ et modélisation numérique The atmospheric boundary layer (ABL) is the part of the atmosphere controlled by the heating and cooling of the ground surface. The height of the ABL strongly varies, from a few

par Julian Quimbayo Duarte

Projet de thèse en Océan, Atmosphère, Hydrologie

Sous la direction de Chantal Staquet.

Thèses en préparation à Grenoble Alpes , dans le cadre de Terre, Univers, Environnement , en partenariat avec Laboratoire des Ecoulements Géophysiques et Industriels (laboratoire) depuis le 01-03-2015 .


  • Résumé

    The occurrence of air-pollution episodes is very usual under winter-time stable atmospheric conditions over complex terrain. These episodes fundamentally depend on local atmospheric conditions and the mechanisms that cause such episodes are still unresolved. Cities located in basins surrounded by mountains suffer from these episodes during winter season; examples are Grenoble or Passy in the French Alps. The goal of this study is to investigate the interaction between the atmospheric dynamics and pollutant concentration in the Alpine valley atmosphere under such atmospheric conditions. This will be done by performing different numerical simulations using the Weather Research and Forecasting (WRF). The methodology is planned to approach the problem with a simpler case where different idealized configurations of the valley topography are implemented to isolate the drivers of pollution in the atmosphere under such stable conditions. Later, a real case nested simulation is planned with the most inner domain centered in the Passy valley, the result of the simulations will be compared against real data collected from Passy field campaign 2015.

  • Titre traduit

    Wintertime atmospheric dynamics in mountain terrain: field measurements and numerical modelling


  • Résumé

    The occurrence of air-pollution episodes is very usual under winter-time stable atmospheric conditions over complex terrain. These episodes fundamentally depend on local atmospheric conditions and the mechanisms that cause such episodes are still unresolved. Cities located in basins surrounded by mountains suffer from these episodes during winter season; examples are Grenoble or Passy in the French Alps. The goal of this study is to investigate the interaction between the atmospheric dynamics and pollutant concentration in the Alpine valley atmosphere under such atmospheric conditions. This will be done by performing different numerical simulations using the Weather Research and Forecasting (WRF). The methodology is planned to approach the problem with a simpler case where different idealized configurations of the valley topography are implemented to isolate the drivers of pollution in the atmosphere under such stable conditions. Later, a real case nested simulation is planned with the most inner domain centered in the Passy valley, the result of the simulations will be compared against real data collected from Passy field campaign 2015.