Skip to content


Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?

Latest commit

Fixes separating std and performance blessing

When blessing performance diffs, the default hist and namelists would
be run as well. This PR separates these, there is now two distinct blessing
paths; standard (hist and namelists) and performance.

Test suite: pytest CIME/tests/test_unit*
Test baseline: n/a
Test namelist changes: n/a
Test status: n/a

Fixes n/a
User interface changes?: N
Update gh-pages html (Y/N)?: N


Failed to load latest commit information.
Latest commit message
Commit time


Common Infrastructure for Modeling the Earth

CIME, pronounced "SEAM", primarily consists of a Case Control System that supports the configuration, compilation, execution, system testing and unit testing of an Earth System Model. The two main components of the Case Control System are:

  1. Scripts to enable simple generation of model executables and associated input files for different scientific cases, component resolutions and combinations of full, data and stub components with a handful of commands.
  2. Testing utilities to run defined system tests and report results for different configurations of the coupled system.

CIME does not contain the source code for any Earth System Model drivers or components. It is typically included alongside the source code of a host model. However, CIME does include pointers to external repositories that contain drivers, data models and other test components. These external components can be easily assembled to facilitate end-to-end system tests of the CIME infrastructure, which are defined in the CIME repository.

CIME is currently used by the Community Earth System Model (CESM) and the Energy Exascale Earth System Model (E3SM).




Lead Developers

Jim Edwards (NCAR), Jim Foucar (SNL)

Also Developed by

Alice Bertini (NCAR), Jason Boutte (LLNL), Tony Craig (NCAR), Michael Deakin (SNL), Chris Fischer (NCAR), Erich Foster (SNL), Steve Goldhaber (NCAR), Robert Jacob (ANL), Mike Levy (NCAR), Bill Sacks (NCAR), Andrew Salinger (SNL), Sean Santos (NCAR), Jason Sarich (ANL), Mariana Vertenstein (NCAR), Andreas Wilke (ANL).


CIME is jointly developed with support from the Earth System Modeling program of DOE's BER office and the CESM program of NSF's Division of Atmospheric and Geospace Sciences.


CIME is free software made available under the BSD License. For details see the LICENSE file.

Digital Object Identifier