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RISAn Efficient, One-Level, Primitive-Equation Spectral Model
Publisher: American Meteorological Society
Abstract: A one-level, global, spectral model using the primitive equations is formulated in terms of a concise form of the prognostic equations for vorticity and divergence. The model integration incorporates a grid transform ...
A Multi-Level Spectral Model. I. Formulation and Hemispheric Integrations
Publisher: American Meteorological Society
Abstract: The formulation of a multi-level spectral model suitable for simulation of atmospheric flow on a hemispheric or global scale is presented. The derived primitive equations are employed together with spectral-grid transform ...
Implications of Horizontal Resolution in Spectral Model Integrations
Publisher: American Meteorological Society
Abstract: Free surface and non-divergent spectral models have been integrated using varying resolutions with both analytic and meteorological initial fields. The results have been interpreted in terms of convergence of solutions. ...
Southern Hemisphere Forecast Experiments with a One-Level Spectral Model
Publisher: American Meteorological Society
Abstract: A one-level primitive equation spectral model has been initialized with hemispheric 500 mb geopotential height and vorticity fields using the Southern Hemisphere GARP data sets for the period 3?12 November 1969 inclusive. ...
Comparison of Space and Time Errors in Spectral Numerical Solutions of the Global Shallow-Water Equations
Publisher: American Meteorological Society
Abstract: The convergence of spectral model numerical solutions of the global shallow-water equations is examined as a function of the time step and the spectral truncation. The contributions to the errors due to the spatial and ...
A Global Spectral Model for Simulation of the General Circulation
Publisher: American Meteorological Society
Abstract: A global general circulation for mean January conditions has been conducted with a nine-level, wavenumber 15 (rhomboidal) spectral model. A semi-implicit algorithm has been used in the time integration, thereby enhancing ...
Atmospheric General Circulation Simulations with the BMRC Global Spectral Model. The Impact of Revised Physical Parameterizations
Publisher: American Meteorological Society
Abstract: Results are presented for perpetual January and July general circulation simulations using the Australian Bureau of Meteorology Research Centre global spectral model. Particular emphasis is placed on the impact of changes ...
The Simulation of Stationary and Transient Geopotential-Height Eddies in January and July with a Spectral General Circulation Model
Publisher: American Meteorological Society
Abstract: We examine the characteristics of stationary and transient eddies in the geopotential-height field as simulated by a spectral general circulation model. The model possesses a realistic distribution of continents and oceans ...
January and July Simulations with a Spectral General Circulation Model
Publisher: American Meteorological Society
Abstract: We describe the results of January and July simulations carded out with a nine-level spectral model, employing a rhomboidal truncation at wavenumber 15. Sea-surface temperature, sea-ice distribution and solar zenith angle ...