Overview of the CSL
The 2012 CSL submission opportunity is now closed.
The Climate Simulation Laboratory (CSL) at NCAR is a dedicated climate model computing facility. It supports the multiagency U.S. Global Change Research Program by providing high-performance computing and data storage systems to support large-scale, long-running simulations of the Earth's climate system, including appropriate model components, that need to be completed in a short calendar period. CSL allocations are made approximately every 18 months.
For the CSL, the Earth's climate system is defined as the coupled atmosphere, oceans, land, cryosphere, and associated biogeochemistry and ecology, studied on time scales ranging from seasons to centuries. The CSL's long-running simulations typically require hundreds of thousands of processor hours for completion and usually produce many gigabytes or terabytes of model output that must be archived for analysis and comparison with other simulations and with observations.
Most U.S.-based researchers with funding from federal, state, or university sources are eligible to apply. For Yellowstone submissions, the minimum request size is 10 million core-hours. Approximately 250 million core-hours are available to the CSL over the 18-month allocation period.
The CSL is operated by the National Center for Atmospheric Research (NCAR), located in Boulder, Colorado, and administered by the National Science Foundation (NSF). The computational facilities are operated and maintained by the NCAR Computational and Information Systems Laboratory (CISL).
The next round of CSL projects will be conducted on NCAR’s petascale Yellowstone system, an IBM iDataPlex cluster. The Yellowstone hardware is a 1.5-petaflops high-performance computing system with 30 times the workload throughput of NCAR’s Bluefire supercomputer.
Yellowstone is integrated with a centralized file system and data storage system (GLADE) that provides 15 times the sustained I/O bandwidth and 12 times the capacity of CISL’s previous GLADE system. The combined data analysis and visualization (DAV) systems (Geyser and Caldera) provide a 20-fold increase in CISL’s dedicated DAV resources. CISL's High-Performance Storage System (HPSS) is also available to CSL projects. Proposals must specifically request GLADE, DAV, and HPSS resources that are needed above a minimum level on the CSL web form. CSL users also have access to the full range of CISL support and consulting services.