Initialization of a Barotropic Limited-Area Model Using the Laplace Transform Technique

Abstract

The Laplace transform technique of initialization is used to initialize the data for a barotropic forecasting model over a limited area. The initialization is successful in suppressing high-frequency oscillations during early forecast hours. It has negligible effect upon the resulting 24-hour forecast. A variation of the linearization, wherein the Coriolis parameter is held constant, is investigated. It is found that the fields which result after a single nonlinear iteration of the modified scheme are almost identical to those resulting from the more general scheme.