A Machine‐Learning‐Assisted Stochastic Cloud Population Model as a Parameterization of Cumulus Convection

A stochastic parameterization of deep convection organization using cellular automata

Stochastic representations of atmospheric processes are becoming more and more frequent in order to address model errors associated with parameterization schemes and sub-grid scale variability, e.g. Lin and Neelin (2002), Shutts (2005), Teixeira and Reynolds (2008), Plant and Craig (2008), Berner et al. (2008). A typical example of sub-grid variability arises from organized deep convection in t...

Testing a Cumulus Parameterization With a Cumulus Ensemble Model in Weak Temperature Gradient Mode

This paper prototypes a method for calibrating a cumulus parameterization against a cumulus ensemble model. The key to this technique is to run the cumulus model and the parameterization in identical test cells which provide forcing typical of that seen over tropical oceans. In particular, the mean temperature pro le is relaxed to a reference pro le which is assumed to be characteristic of the ...

Interactions between Cloud Microphysics and Cumulus Convection in a General Circulation Model

In the Colorado State University general circulation model, cumulus detrainment of cloud water and cloud ice has been, up to now, the only direct coupling between convective and large-scale condensation processes. This one-way interaction from the convective to the large-scale environment parameterizes, in a highly simplified manner, the growth of anvils spreading horizontally at the tops of na...

Evaluation of the atmospheric transport in a GCM using radon measurements: sensitivity to cumulus convection parameterization

The radioactive species radon (222Rn) has long been used as a test tracer for the numerical simulation of large scale transport processes. In this study, radon transport experiments are carried out using an atmospheric GCM with a finite-difference dynamical core, the van Leer type FFSL advection algorithm, and two state-of-the-art cumulus convection parameterization schemes. Measurements of sur...

Ad-aoio 194 Cumulus Cloud Energetics as Revealed in a Numerical Model of Cloud Dynamics