Abstract: A procedure leading to a stable space-centered, leapfrog time-differencing scheme, capable of preventing the false two-grid-interval noise that arises when two large-scale solutions are separated an different elementary ...

Abstract: The pressure gradient force error of the spectral technique used in combination with the σ vertical coordinate was examined in an idealized case of an atmosphere at rest and in hydrostatic equilibrium. Small-scale (one-point ...

Abstract: A comprehensive physical package has been developed for a regional eta coordinate model with the steplike mountain representation. This paper describes the basic problems, concepts and numerical techniques developed, and ...

Abstract: A common problem with nonlinear advection schemes is the false accumulation of energy at the smallest resolvable scales. To keep this process under control, following Arakawa (1966), a number of energy and enstrophy ...

Abstract: The step-mountain eta model has shown a surprising skill in forecasting severe storms. Much of the credit for this should be given to the Betts and Miller (hereafter referred to as BM) convection scheme and the Mellor-Yamada ...

Abstract: The effect of the grid choice on the stationary solutions of the linearized shallow water equations in the presence of topography is examined. The time-averaged numerical solutions on the C grid reported by Arakawa and ...

Abstract: Data from the 1987 summer FIFE experiment for four pairs of days are compared with corresponding 48-h forecasts from two different versions of the Eta Model, both initialized from the NCEP?NCAR (National Centers for ...

Abstract: The problem of the pressure gradient force error in the case of the terrain-following (sigma) coordinate does not appear to have a solution. The problem is not one of truncation error in the calculation of space derivatives ...