An n-level quasi-geostrophic model suitable for operational use /

A quasi-geostrophic model has been formulated using the potential vorticity as the only time dependent model variable. The model consists of a two-dimensional prognostic equation of the hyperbolic-type and a three-dimensional diagnostic equation of the elliptic-type. This formulation permits the model equations to be solved more efficiently and perhaps also more accurately than any other formulation that has been in operational use. Preliminary numerical tests using observed data, in connection with comparison case studies of the effect of discretization error and the influence of the lower boundary conditions, indicate that the model is realistic enough to warrant further tests for possible operational use."Meteorology Laboratory Project 8604.""ADA003663 (from http://www.dtic.mil).""22 October 1974."Includes bibliographical references (page 23).A quasi-geostrophic model has been formulated using the potential vorticity as the only time dependent model variable. The model consists of a two-dimensional prognostic equation of the hyperbolic-type and a three-dimensional diagnostic equation of the elliptic-type. This formulation permits the model equations to be solved more efficiently and perhaps also more accurately than any other formulation that has been in operational use. Preliminary numerical tests using observed data, in connection with comparison case studies of the effect of discretization error and the influence of the lower boundary conditions, indicate that the model is realistic enough to warrant further tests for possible operational use.Mode of access: Internet