Abstract
The High Order Method Modeling Environment is a scalable, spectral-element-based prototype for the Community Atmospheric Model component of the Community Climate System Model. The 3D moist primitive equations are solved on the cubed sphere with a hybrid pressure η vertical coordinate using an Emanuel convective parametrization for moist processes. Semi-implicit time integration, based on a preconditioned conjugate gradient solver, circumvents the time step restrictions associated with gravity waves. Benchmarks for two standard tests problems at 10 km horizontal resolution have been run on Blue Gene/ L. Results obtained on a 32-rack Blue Gene/L system (65,536 processors, 183.5-teraflop peak) show sustained performance of 8.0 teraflops on 32,768 processors for the moist Held-Suarez test problem in coprocessor mode and 11.3 teraflops on 32,768 processors for the aquaplanet test problem, running in virtual node mode.
| Original language | English |
|---|---|
| Pages (from-to) | 237-253 |
| Number of pages | 17 |
| Journal | International Journal of Computational Methods |
| Volume | 5 |
| Issue number | 2 |
| DOIs | |
| State | Published - Jun 2008 |
Keywords
- Atmospheric modeling
- High order methods
- Parallel computing
- Scalable algorithms