CAM: The Community Atmosphere Model

CAM code is stored in this repository on branches other than main. The details are explained below.

Please see the wiki for complete documentation on CAM, getting started with git and how to contribute to CAM's development.

This repository has four officially-supported branches:

• main - contains this readme and the Code of Conduct information
• cam_cesm2_2_rel - contains the current CESM2.2 CAM code
• cam_cesm2_1_rel - contains the current CESM2.1 CAM code
• cam_development - contains the current CAM development code (see the important note below before using this branch)

There are other branches in this repo that have a zz_ prefix which are used for special projects. Please note that use of these branches is not-supported and may very likely produce un-scientific results in certain configurations.

How to checkout and use CAM:

The instructions below assume you have cloned this repository and are in the repository directory. For example:

git clone https://github.com/ESCOMP/CAM
cd CAM

To run CAM compatible with the CESM2.2 release:

git checkout cam_cesm2_2_rel_02
./manage_externals/checkout_externals

To run CAM compatible with the CESM2.1 release:

git checkout cam_cesm2_1_rel_41
./manage_externals/checkout_externals

To view the release branches in Github, go to the "Branch:main" pulldown menu and select the appropriate branch.

To use unsupported CAM development code:

NOTE: This is unsupported development code and is subject to the CESM developer's agreement.

git checkout cam6_3_162
./bin/git-fleximod update

CAM Documentation - https://ncar.github.io/CAM/doc/build/html/index.html

CAM6 namelist settings - https://docs.cesm.ucar.edu/models/cesm2/settings/current/cam_nml.html