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A workshop, sponsored by DOE's High Performance Computing Center Program, was held in September 1994 to discuss and to define ocean model test problems. The motivation for the workshop, and for the definition of test problems, comes from the expanding variety of new and innovative methods currently being used in ocean modeling, and from the need for a systematic means of model/model comparison. The first goal of the workshop was to identify a suite of ocean model test problems that were objective, unbaised, and quantifiable relative to a well-defined standard of merit. A suite of proposed test problems were developed, and are described in detail in the workshop proceedings (Test Problem Working Group, 1996). A long- range goal of the workshop was to calculate reference solutions to the test problems, and to undertake model/model evaluation across the prevailing classes of ocean circulation models. A progress report on this latter activity will be given, with emphasis on the effects of alternate advection schemes, vertical coordinates, and numerical algorithms.
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