Experiments in the Initialization of a Global Primitive Equation Model
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A global, multi-level, baroclinic primitve equatiotion model is used as a vehicle to test several initialization procedures for suppressing inertial-gravity noise, including static balancing on pressure and on sigma surfaces, iterative dynamic balancing with Temperaton's averaging scheme, and finally the use of a time filter. It is tentatively concluded that static balancing, followed by dynamic balancing equivalent to a 12 h forecast and the use of a time filter will suppress gravity noise adequately for prediction purposes and may also permit nonsynoptic data to be assimilated about every 4 h without serious trauma.
The article of record as published may be found at http://dx.doi.org/10.1175/1520-0450(1975)014<0281:EITIOA>2.0.CO;2