Computational performance of ultra-high-resolution capability in the Community Earth System Model

With the fourth release of the Community Climate System Model, the ability to perform ultra-high-resolution climate simulations is now possible, enabling eddy-resolving ocean and sea-ice models to be coupled to a finite-volume atmosphere model for a range of atmospheric resolutions. This capability...

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Bibliographic Details
Published in:The International Journal of High Performance Computing Applications
Main Authors: Dennis, John M., Vertenstein, Mariana, Worley, Patrick H., Mirin, Arthur A., Craig, Anthony P., Jacob, Robert, Mickelson, Sheri
Format: Article in Journal/Newspaper
Language:English
Published: SAGE Publications 2012
Subjects:
Sea ice
Online Access:http://dx.doi.org/10.1177/1094342012436965
http://journals.sagepub.com/doi/pdf/10.1177/1094342012436965
http://journals.sagepub.com/doi/full-xml/10.1177/1094342012436965
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Summary:With the fourth release of the Community Climate System Model, the ability to perform ultra-high-resolution climate simulations is now possible, enabling eddy-resolving ocean and sea-ice models to be coupled to a finite-volume atmosphere model for a range of atmospheric resolutions. This capability was made possible by enabling the model to use large scale parallelism, which required a significant refactoring of the software infrastructure. We describe the scalability of two ultra-high-resolution coupled configurations on leadership class computing platforms. We demonstrate the ability to utilize over 30,000 processor cores on a Cray XT5 system and over 60,000 cores on an IBM Blue Gene/P system to obtain climatologically relevant simulation rates for these configurations.

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