Community Earth System Model (CESM) is a software suite for simulating Earth climate.
More information: http://www2.cesm.ucar.edu
To see available versions when logged into Fram issue command
module spider cesm
To use CESM type
module load CESM/<version>
specifying one of the available versions.
CESM is public domain software, however, portions of the CESM package are under other licenses. For more information, visit http://www.cesm.ucar.edu/models/cesm1.0/copyright.html
It is the user's responsibility to make sure they adhere to the license agreements.
When publishing results obtained with the software referred to, please do check the developers web page in order to find the correct citation(s).