2A.2 Renovation of JMA-GSM

Monday, 1 June 2009: 10:45 AM
Grand Ballroom East (DoubleTree Hotel & EMC - Downtown, Omaha)
Kengo Miyamoto, AESTO/JMA, Tokyo, Japan

JMA-GSM is the global atmospheric model for official weather forecasting in Japan. The model was renovated at 5 August, 2008. Although the principles were not changed from the conventional model, the implementation was renovated: reduced spectral transformation was introduced; the calculation domain was two-dimensionally decomposed; the procedures of inter-node communication were refined; OpenMP was adopted for shared memory parallelization; some defectives were corrected; the source program was reorganized.

In this presentation, we will introduce the details of the renovation and show how the renovation makes the model faster and improves the accuracy.

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