Assessing the Grell-Freitas Convection Parameterization in the NASA GEOS Modeling System.

ABSTRACT: We implemented and began to evaluate an alternative convection parameterization for the NASA Goddard Earth Observing System (GEOS) general circulation model (GCM). The proposed parameterization follows the mass flux approach with several closures, for equilibrium and nonequilibrium convection, and includes scale and aerosol aware functionalities. Recently, we extended the scheme to a trimodal spectral size distribution of allowed convective plumes to simulate the transition among shallow, congestus, and deep convection regimes. In addition, the inclusion of a new closure for nonequilibrium convection resulted in a substantial gain of realism in the model representation of the diurnal cycle of convection over the land. We demonstrated the scale-dependence functionality with a cascade of glo

SUBMITTER: Freitas SR 

PROVIDER: S-EPMC6108381 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature