The Grell–Freitas (GF) convection parameterization: recent developments, extensions, and applications

Abstract. Recent developments and options in the GF (Grell Freitas, 2014; Freitas et al., 2018) convection parameterization are presented. The has been expanded to a trimodal spectral size simulate three modes: shallow, congestus, deep. In contrast usual entrainment detrainment assumptions, we assume that beta functions (BFs), commonly applied represent probability density (PDFs), can be used characterize vertical mass flux profiles for modes use BFs derive rates. We also added new closure nonequilibrium improved simulation of diurnal cycle convection, with better representation transition from shallow deep regimes over land. transport chemical constituents (including wet deposition) treated inside scheme. tracer is handled form mass-conserving. Finally, cloud microphysics have extended include ice phase conversion liquid water updrafts resulting additional heat release melting snow rain.