Common Community Physics Package (CCPP)

CCPP Ecosystem Detailes
Depiction of the concept of a Common Community Physics Package Ecosystem. Although an officially-supported version of the CCPP exists (within bold-outlined oval), the software infrastructure allows for use (largest oval) and development (second-largest oval) from within the broader community. The operational physics suite can be drawn from the supported CCPP

The Global Model Test Bed (GMTB) has been tasked to develop a Common Community Physics Package (CCPP) for use within operational centers and the research community. For information about the CCPP V1.0 release click here. Such a framework allows for a relatively small number of supported suites of physical parameterizations to be supported and easily shared among interested groups. Operational centers can draw from this repository for operational NWP, the research community has access to the same codes for R&D, and innovations can be effectively tested and funneled back to operational centers to improve forecasts.

Highlights of the CCPP Ecosystem include:

  • The use of a modern software framework (git) allows for tiers of users within the CCPP ecosystem.

  • Users within the open community can have “read-only” access and are not expected to contribute back. This level of access can be useful for externally-funded research and as a ”low-bar to entry” for testing new ideas.

  • Contributors within the open community can maintain their own “forks” of the officially supported CCPP, developing and maintaining code within their own institutions, and allowing for shared development across institutions. This tier of users is largely for the incubation of physics innovations.

  • Core partners (NOAA EMC, DTC consisting of NOAA GSD and NCAR/RAL staff, and others) support and maintain mature physics suites. Elevation to a supported status within the CCPP requires acceptance by a review committee consisting of members from all core partners.

  • Operational centers control the contents of their physics suites, but they are drawn from the CCPP.