This study deals with the problem of evaluating the contribution of moisture saturation from the lower layer to the middle layer of the troposphere within a stratiform precipitation zone on the intensification and trajectory of the mesoscale vortex which is at the origin of the cyclonic formations. The specific goal pursued here is the establishment of a model able to simulate deep convection over an ocean surface in a tropical zone. Thus, a three-dimensional hydrostatic mesoscale model including an explicit moisture scheme based on the Pennsylvania State University - National Center for Atmospheric Research Mesoscale Model (PSU/NCAR) is used. For the parameterization of the turbulence terms, an approach that combines turbulent diffusion and mass flux (eddy diffusivity/mass flux scheme) is exploited.

modeling, deep convection, mass flux, mixing ratio, mesoscale, hydrometeors, cloud.