This guide only explains how to add the extended functionality to CLM and not how CESM can be installed.

Obtaining the Source Code

The source code must first be obtained from github: git clone


There is one additional source code file and a number of original CLM files were changed (see Source Files). The files need to go in to the SourceMods folder ($CASEROOT/SourceMods/src.clm/) before CESM is compiled.