An Efficient, One-Level, Primitive-Equation Spectral Model

A one-level, global, spectral model using the of an equivalent model based on the traditional interaction primitive equations is formulated in terms of a concise coefficients. The transform model, in integrations of 116 form of the prognostic equations for vorticity and diver-days, satisfies principles of conservation of energy, gence. The model integration incorporates a grid transform angular momentum, and square potential vorticity to a technique to evaluate nonlinear terms; the computational high degree. efficiency of the model is found to be far superior to that