Parallel implementation and scalability of cloud resolving EULAG model

Authors:
Andrzej A. Wyszogrodzki;Zbigniew P. Piotrowski;Wojciech W. Grabowski
Affiliations:
National Center for Atmospheric Research, Boulder, Co;National Center for Atmospheric Research, Boulder, Co;National Center for Atmospheric Research, Boulder, Co
Venue:
PPAM'11 Proceedings of the 9th international conference on Parallel Processing and Applied Mathematics - Volume Part II
Year:
2011

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Abstract

Progress in the development of the PetaScale implementation of the anelastic EULAG model combined with the warm-rain bulk and bin microphysics schemes, as well its application to multiscale cloud modeling, are presented. A new three-dimensional (3D) model domain decomposition is implemented to increase model performance and scalability. We investigate performance of the code on IBM BlueGene/L and Cray XT4/XE6 architectures. The scalability results show significant improvement of the new domain decomposition over the previous 2D decomposition used as the standard in many geophysical fluid flow models.