VERTICAL TRANSPORT BY CONVECTIVE CLOUDS - COMPARISONS OF 3 MODELING APPROACHES

We have performed a preliminary comparison of the GEOS-1 (Goddard Eart h Observing System) data assimilation system convective cloud mass flu xes with fluxes from a cloud-resolving model (the Goddard Cumulus Ense mble Model, GCE). A squall line case study (10-11 June 1985 Oklahoma P RESTORM episode) is the basis comparison. Regional (central U. S.) con vective mass flux for June 1985 from GEOS-1 compares favorably with es timates from a statistical/dynamical approach using GCE simulations an d satellite-derived cloud observations. The GEOS-1 convective mass flu xes produce reasonable estimates of monthly-averaged regional convecti ve venting of CO from the boundary layer at least in an urban-influenc ed continental region, suggesting that they can be used in tracer tran sport simulations.