The Use of Non-Geostrophic Balanced Model for Numerical Weather Prediction

Abstract

 A 3-layer non-geostrophic balanced model is constructed and the results of a numerical prediction applied over the Northern Hemisphere are examined.
 In this model, a generalized “balance” relation is assumed between wind and pressure fields. The equation of change of water vapour is treated explicitly. The nonadiabatic effects, such as the effects of latent heat due to condensation by large-scale motion and the sensible heat transfer from the sea surface, are taken into account. The vertical motion due to large-scale topography and the surface friction layer are also considered in a crude manner and treated as a lower boundary condition for the so-called ω-equation.