CAM: The Community Atmosphere Model

CAM code is stored in this repository on branches other than master. 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 three CAM branches:

• master - contains this readme and the Code of Conduct information
• cam_cesm2_1_release - contains the current CESM2.1 CAM code
• cam_development - contains the current CAM development code (see the important note below before using this branch)

CAM-Nor: CAM version in the Norwegian Earth System Model

This repository has the following CAM-Nor branches:

• cam_cesm2_1_rel_05-Nor - contains the CAM6-Nor code, based on CESM2.1 CAM code. Contains aerotab and further changes as described by Seland et al. 2020, with tags

  • cam_cesm2_1_rel_05-Nor_v1.0.1 -- CAM6-Nor version, initial preliminary release of CMIP6 version, May 11 2020

  • cam_cesm2_1_rel_05-Nor_v1.0.2 -- CAM6-Nor version, CMIP6 bit-identical version (if used on fram, and as MM), June 2020

• cam_cesm2_1_rel_05-Nor-SpAer - based on cam_cesm2_1_rel_05-Nor, about to contain simple plume aerosol model code

• cam_cesm2_1_rel_05-Nor_v1.0.2_keyClim-withoutanthraer - based on cam_cesm2_1_rel_05-Nor (branched off at tag cam_cesm2_1_rel_05-Nor_v1.0.2) : related to version used in project KeyClim for simulation without anthropogenic aerosol (only natural aerosol)

• cam-Nor-dev - based on cam_cesm2_1_rel_05-Nor (branched off at tag cam_cesm2_1_rel_05-Nor_v1.0.2) : post-CMIP6 development version of CAM6-Nor (including bugfixes, new developments, answer-changes modifications, ...)

• feature-hamocc-vsls - based on cam_cesm2_1_rel_05-Nor (branched off at tag cam_cesm2_1_rel_05-Nor_v1.0.2) : related to version developed in project KeyClim for simulation of Very Short Lived Spiecies (VSLS) in ocean and atmosphere.

CAM-Nor and NorESM documentation https://noresm-docs.readthedocs.io/en/noresm2/

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 CESM2.1 release:

git checkout cam_cesm2_1_rel_33
./manage_externals/checkout_externals

To view the release branch in github, go to the "Branch:master" pulldown menu and select cam_cesm2_1_rel

To use unsupported CAM development code:

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

git checkout cam6_2_000
./manage_externals/checkout_externals

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

CAM6 namelist settings - http://www.cesm.ucar.edu/models/cesm2/settings/current/cam_nml.html