Modeling Entrainment and Finescale Mixing in Cumulus Clouds

摘要: Abstract A model used to study entrainment and mixing of thermodynamic properties in the stratus-topped boundary layer has been extended represent these processes cumulus clouds. The new model, called “explicit parcel model” (EMPM), depicts finescale internal structure a rising thermal cloud using 1D domain. EMPM links conventional which no structure, multidimensional models, resolve cloud-scale produced by large eddies. In EMPM, evolves as consequence sequence discrete events an explicit representation turbulent based on Kerstein’s linear eddy model. this version subgrid-scale (eddy) diffusion is found be adequate for representing effects smallest addition, simple parameterization determine local condensation or evaporation rates. If grid size reduced so that Kolmogorov ...