Distributed-memory concepts in the wave model WAVEWATCH III

摘要

Parallel concepts for spectral wind-wave models are discussed, with a focus on the WAVE- WATCH III model which runs in a routine operational mode at NOAA/NCEP. After a brief Description of relevant aspects of wave models, basic parallelization concepts are discussed. It is Argued that a method including data transposes is more suitable for this model than conven- tional domain decomposition techniques. Details of the implementation, including specific buf- Fering techniques for the data to be communicated between processors, are discussed. Extensive Timing results are presented for up to 450 processors on an IBM RS6000 SP. The resulting mod- El is shown to exhibit excellent parallel behavior for a large range of numbers of proces- Sors.