The Role of Entrainment in the Diurnal Cycle of Continental Convection

摘要: Abstract In continental convective environments, general circulation models typically produce a diurnal cycle of rainfall that peaks close to the noon maximum insolation, hours earlier than observed peak. One possible reason is insufficient sensitivity their cumulus parameterizations state environment due weak entrainment. The Weather Research and Forecasting (WRF) model, run at cloud-resolving (600 125 m) resolution, used study transition from shallow deep convection during monsoon break period Tropical Warm Pool–International Cloud Experiment. WRF model develops in isolated events by 1430–1500 local time. inferred entrainment rate weakens with increasing time day as deepens. Several current are tested for ability reproduce behavior. Gregory parameterization, which varies directly parcel buoyancy inver...