EXPERIMENTS WITH A LAND-SURFACE MODEL COUPLED TO A HIGH-RESOLUTION NWP SYSTEM

摘要

Selected cases of fair weather convective conditions and convectivly produced rain episodes were used to evaluate the behavior of a land-surface model coupled to a high-resolution numerical weather prediction sys- tem. The main purpose of this paper is to gain in- sight into how surface heterogeneity can influence the modeled convective boundary layer, and whether the complexity of the modeled land-atmosphere interactions can improve forecasts of convective precipitation. The NOAH land-surface model has been coupled to the Cou- pled Ocean/Atmosphere Mesoscale Prediction System (COAMPS). Our experiments are designed such that dif- ferent surface conditions (wet soil during rain episodes and dry soil conditions during fair weather days) and dif- ferent atmospheric situations could be used to further our understanding of the behavior of the model by compar- ing model solutions to surface observations. In addition, selected cases were subjectively verified using satellite data.