It is at the regional and global scales where we need to quantify how an improved description of the processes will yield better surface fluxes and improved descriptions of the interactions with clouds. Our hypothesis is that better representations of surface fluxes will lead a more accurate description of boundary-layer dynamics and clouds. To this end, our plan is to embed the large-eddy simulation to a high-resolution global model, ECMWF-IFS, and perform validations of surface and upper atmospheric conditions for multiple ecosystems over timescales ranging from one week to a full season.