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Title: Computational Performance of Ultra-High-Resolution Capability in the Community Earth System Model

Journal Article · · International Journal of High Performance Computing Applications
 [1];  [1];  [2];  [3];  [1];  [4];  [4]
  1. National Center for Atmospheric Research (NCAR)
  2. ORNL
  3. Lawrence Livermore National Laboratory (LLNL)
  4. Argonne National Laboratory (ANL)
+ Show Author Affiliations

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.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). National Center for Computational Sciences (NCCS)
Sponsoring Organization:
USDOE Office of Science (SC)
DOE Contract Number:
DE-AC05-00OR22725
OSTI ID:
1040733
Journal Information:
International Journal of High Performance Computing Applications, Vol. 26, Issue 1; ISSN 1094-3420
Country of Publication:
United States
Language:
English

References (14)

Frontal Scale Air–Sea Interaction in High-Resolution Coupled Climate Models journal December 2010
A new flexible coupler for earth system modeling developed for CCSM4 and CESM1 journal November 2011
CPL6: The New Extensible, High Performance Parallel Coupler for the Community Climate System Model journal August 2005
Inverse Space-Filling Curve Partitioning of a Global Ocean Model conference March 2007
An application-level parallel I/O library for Earth system models journal December 2011
Refactoring Scientific Applications for Massive Parallelism book January 2011
Characterizing application sensitivity to OS interference using kernel-level noise injection conference November 2008
Vectorizing the Community Land Model journal August 2005
Computational Design and Performance of the Fast Ocean Atmosphere Model, Version One book January 2001
Practical performance portability in the Parallel Ocean Program (POP) journal January 2005
A prototype two-decade fully-coupled fine-resolution CCSM simulation journal January 2011
Explicit Generation of Orthogonal Grids for Ocean Models journal July 1996
Autonomic oil reservoir optimization on the Grid journal January 2004
Towards Direct Simulation of Future Tropical Cyclone Statistics in a High-Resolution Global Atmospheric Model journal January 2010

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Related Subjects

99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
CLIMATES
PERFORMANCE
RESOLUTION
SEAS
SIMULATION