Development and Testing of a Land-Surface and PBL Model with Explicit SoilMoisture Parameterization

摘要

In the paper, the authors describe the development of a simple surface/PBL modelfor eventual inclusion into the MM4. The land-surface portion of the model is based on a model developed at the Centre National de Recherches Meteorologiques in Toulouse, France (Noilhan and Planton, 1989). The PBL module and flux-profile relationships are the same as currently used in the latest version of RADM. The PBL model is a hybrid of nonlocal closure, for convective conditions, and eddy diffusion. A preliminary version of the model, initially in 1-D form, is applied to two field studies for comparison, where one case was in a dry sparsely vegetated desert (Wangara) and the other in a rather moist long grass prairie (FIFE). Note that these case studies represent the initial testing of a model which is still under development (for example, the effects of condensation and clouds are yet to be included).