Abstract
The integration of stiff, very coupled, ordinary differential equations which describe pollutant chemical reactions is the most intensive computational task of photochemical models, since it requires at least 70% of the total CPU time. As a consequence of the local nature of these equations, the integration can be performed very efficiently by a SIMD architecture. In this work we present the porting of QSSA (Quasi Steady State Approximation) chemical solver of CALGRID photochemical model on the SIMD massively parallel platform Quadrics/APElOO which offers, in QH4 configuration, a peack performance of 25 Gflops. Transactions on Information and Communications Technologies vol 15, © 1997 WIT Press, www.witpress.com, ISSN 1743-3517
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