HPC resources | Climate Simulation Laboratory | University Community
NCAR Community | Wyoming-NCAR Alliance | Accelerated Scientific Discovery

The Computational and Information Systems Laboratory (CISL) provides large computing resources for university researchers and NCAR scientists in atmospheric, oceanic, and related sciences. To access these supercomputers, storage systems, and other resources, users must apply for allocations, which NCAR makes available through several facilities.

Applications are reviewed and time is allocated according to the needs of the projects and the availability of resources. Send questions about the following allocation opportunities to

Allocations for Cheyenne and Yellowstone Resources

The deployment in early 2017 of the Cheyenne environment at the NCAR-Wyoming Supercomputing Center (NWSC) will greatly expand the resources and opportunities available to researchers in the atmospheric and related sciences. The Cheyenne HPC system will provide more than 1.2 billion core-hours for allocation each year.

The Yellowstone system will be in its final year of service in 2017, allowing researchers who started large projects on that system to complete them. Some limited opportunities will be available for requesting extensions for work that must remain on Yellowstone.

Allocations generally are required for access to the HPC, data analysis, visualization, and storage systems that CISL manages. Access to data collections via the Research Data Archive, Community Data Portal, and Earth System Grid may require separate registration for access to some data sets, but allocations are not required.

University researchers and NCAR scientists request allocations through the various opportunities described below.

Climate Simulation Laboratory

The Climate Simulation Laboratory (CSL) is CISL’s premier opportunity for researchers seeking high-performance computing and data storage systems to support extremely demanding, high-profile climate simulations. These long-running simulations typically require millions of core-hours to complete and usually produce many terabytes of model output that must be stored for analysis and comparison with other simulations and with observations.

Eligibility. Researchers must have funding from NSF awards to address the climate-related questions for which they are requesting CSL allocations. CSL requests must satisfy additional eligibility criteria for use of this facility.

University Community

NCAR provides computing resources to the university community for investigations that are beyond the scope of university computing centers. University researchers have access to CISL’s computational, analysis and visualization resources and storage systems. See the University allocations page for details.

The CISL HPC Advisory Panel (CHAP) accepts requests for large allocations of NCAR resources every six months, in April and October. Check the CHAP site for the next submission deadline.

Eligibility. In general, any U.S.-based researcher with an NSF award in the atmospheric sciences or computational science in support of the atmospheric sciences is eligible to apply for a University Community allocation. There are some limited opportunities for those without NSF awards.

NCAR Community

NCAR investigators have access to CISL resources through allocations to the NCAR labs and have opportunities to submit requests for larger-scale, project-oriented allocations. Proposals for larger-scale projects are reviewed twice per year to become  NCAR Strategic Capability projects.

Wyoming-NCAR Alliance

The NWSC represents a collaboration between NCAR and the University of Wyoming. As part of the Wyoming-NCAR Alliance (WNA), a portion of the Cheyenne system—about 160 million core-hours per year—is reserved for Wyoming-led projects and allocated by a University of Wyoming-managed process.

Details of the Wyoming process are available at the University of Wyoming web site.

Accelerated Scientific Discovery

CISL will make dedicated, large-scale resources available on NCAR's new Cheyenne supercomputing system from January through March 2017 part of its Accelerated Scientific Discovery (ASD) initiative for university and NCAR research. ASD projects must study a challenging and important problem in the atmospheric sciences or computational science in support of the atmospheric sciences.


Call for Proposals from NSF-Supported University Researchers

Call for Proposals from NCAR Researchers for NSC and ASD Resources

Eleven large-scale, short-term university and NCAR projects that received 2012 Accelerated Scientific Discovery (ASD) awards began putting the Yellowstone system through its paces December 1, 2012. Information about the 2012 projects is available on the following pages.