Petascale atmospheric models for the Community Climate System Model: new developments and evaluation of scalable dynamical cores

摘要: We present results from the integration and evaluation of spectral finite-element method into atmospheric component Community Climate System Model (CCSM). This overcomes scalability bottleneck by allowing use a true two-dimensional domain decomposition for first time in CCSM. Scalability is demonstrated out to 86,200 processors with an average grid spacing 0.25? (25 km). initial evaluations using standardized test problem full suite CCSM model forcings subgrid parametrizations but without land, ice, or ocean models. For this realistic setting, solution unknown. Even convergence under mesh refinement not expected, so we cannot rely on high-resolution reference solutions. Instead focus intermodel comparisons Williamson equivalent resolution methodology evaluate results.