| << | Interaction of Aerosols, Clouds and Radiation/Transboundary Transport of Air Pollution | >> |
Abstract
This study aims at better understanding the interactions between dynamic and radiative fluxes likely to affect the life cycle of low level clouds and particularly during the stratus-fog transition. We use on the one the 1D Mercure_Saturne code and on the other hand the measurements performed at the SIRTA Observatory (25 km South Paris, France). Our study focuses on 10-day period at the end of December 2006. We compare turbulent kinetic energy profiles, vertical gradient of temperature and humidity, infrared radiative cooling and solar radiative heating, horizontal visibility provided by numerical code and observations. Hence, we test the numerical code and we analyse the weight of each factor during the fog event (formation and dissipation) in making sensitivity tests. We also establish probability statistic distribution on dynamic and radiative process during fog event to identify signal responsible of life cycle of fog starting from stratus clouds.