Supersaturation, buoyancy, and deep convection dynamics

Abstract. Motivated by recent discussions concerning differences of convective dynamics in polluted and pristine environments, the so-called invigoration particular, this paper provides an analysis factors affecting updraft buoyancy, such as in-cloud supersaturation, condensate precipitation loading, entrainment. We use deep period from simulations daytime convection development over land discussed our previous publications. An entraining parcel framework is used theoretical analysis. show that for specific case considered here, finite (positive) supersaturation noticeably reduces pseudo-adiabatic buoyancy cumulative available potential energy (cCAPE) lower troposphere. This comes keeping a small fraction water vapor supersaturated state thus reducing latent heating. Such lower-tropospheric impact comparable to effects loading entrainment idealized framework. For entire tropospheric depth, have much more significant on total CAPE. cloud model results, we compare ensemble applying either bulk microphysics scheme with saturation adjustment or comprehensive double-moment prediction. velocities, buoyancies, supersaturations all ensembles. In agreement analysis, saturation-adjustment stronger updrafts predicting there are between conditions below freezing level difficult explain standard components. By piggybacking technique, come combination temperature (i.e., heating) work together make buoyancies velocities slightly larger when compared their analogues. Overall, rather contradict claims environments.