The source code and input datasets are available on the World Wide Web under the URL:
http://www.cesm.ucar.edu/models/ccsm2.0.1
The source code comes in the following form:
To uncompress and untar this file, use the following Unix gunzip and tar commands:
gunzip -c ccsm2.0.1.tar.gz | tar -xf -
The input datasets for CCSM2 are available at the same URL. If the coarse resolution
grid is desired, the T31/gx3v4 input datasets tar file should be downloaded;
T42/gx1v3 input datasets tar file should be downloaded for the fine
resolution grid. If latm5 is used, the T62 input datasets tar file
is required in addition to T42/gx1v3.