This testmods directory is meant to be used in conjunction with a 20th
century transient case at resolution 1x1_tropicAtl. 

This starts the simulation just after the last year of data defined on
that file, in order to test the logic for starting past the end of the
pftdyn file.

NOTE: The fpftdyn path is currently set up to be yellowstone-specific,
due to a limitation in CLM's build-namelist. Erik is adding
functionality to build-namelist to allow putting $DIN_LOC_ROOT in the
fpftdyn variable; once that's done, the user_nl_clm file can be made
machine-agnostic.
