From Global to Cloud-Resolving Scale: Experiments with a Scale-Aware Physics Package and Impact on the Transport of Chemical Species

We will start by providing a summary of the latest cumulus parameterization modeling efforts at NOAA’s Earth System Research Laboratory (ESRL). The physics package includes a scale-aware parameterization of subgrid cloudiness feedback to radiation (coupled PBL, microphysics, radiation, shallow and congestus type convection), the stochastic Grell-Freitas (GF) scale- and aerosol-aware convective parameterization, and an aerosol aware microphysics package. This talsk will focus on the GFconvective parameterization which is based on a stochastic approach originally implemented by Grell and Devenyi (2002) and described in more detail in Grell and Freitas (2014, ACP). It was expanded to include PDF’s for vertical mass flux, as well as modifications to improve the diurnal cycle. This physics package will be used on different scales, spanning global to cloud resolving, to look at the impact on scalar transport and numerical weather prediction. We will compare transport resulting from cloud resolving simulations with those from the scale-aware parameterization as resolution is increased.