This documentation describes tools and procedures to guide paleoclimate scientists through the process of creating fully coupled (all active components) paleoclimate simulations using the NCAR CESM1 model release series CESM1.2. Using the CESM1 model for paleoclimate modeling requires complex, multi-step modifications to the input and forcing files used by the model, particularly for Deep Time simulations where continental configurations have changed. These tools are developed on the computing resources at the National Center for Atmospheric Research (NCAR) and we strive to keep pace with the current version of the CESM1 model. Researchers may need to modify these procedures to accommodate the version of the CESM1 model they are using, or for the computer resources available on their home machines. CESM1(CAM5/CLM4.0) is the default configuration for CESM1.2. To gain more understanding about the CESM1 component models and input files, see the CESM1 documentation.
Throughout this User's Guide we differentiate between the procedures required to create (1) near-modern (e.g., Quaternary, Pliocene) or (2) Deep-Time (pre-Quaternary) model simulations:
Please look for updates on issues, including bugs, associated with this model release, on the CESM Paleoclimate sub-forum through the CESM Bulletin Board. It is the user's responsibility to keep informed of these issues.
- Moving from CCSM3 to CESM1.2
- Moving from CCSM3 to CESM1.0
- CESM1.0 Flowchart (General overview; details depend on model version)