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Implementation and performance of a parallel version of the HIRLAM limited area atmospheric model

✍ Scribed by R. Skålin; D. Bjørge

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
863 KB
Volume
23
Category
Article
ISSN
0167-8191

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✦ Synopsis

The HIRLAM (high resolution limited area modelling) limited-area atmospheric model was originally developed and optimized for shared memory vector-based computers, and has been used for operational weather forecasting on such machines for several years. This paper describes the algorithms applied to obtain a highly parallel implementation of the model, suitable for distributed memory machines. The performance results presented indicate that the parallelization effort has been successful, and the Norwegian Meteorological Institute will run the parallel version in production on a Cray T3E. 0 1997 Elsevier Science B.V.

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We have developed a parallel implementation of a meteorological limited area model using a standard domain decomposition technique. Several communication strategies and message-passing libraries are compared. Results are presented for low, medium and high spatial resolutions. A good performance is o