! user_nl_clm namelist options written by PTCLMmkdata:
! ../PTCLMmkdata --verbose --clmnmlusecase=1850_control --ctsm_root $CTSMROOTDIR -s US-Me2 -d $DIN_LOC_ROOT --debug --sdate 140204 --map_gdate 140204 --mydatadir testing_dir/std1850_file_creation 
 fsurdat = '$CTSMROOTDIR/tools/PTCLM/test/testing_dir/std1850_file_creation/1x1pt_US-Me2/surfdata_1x1pt_US-Me2140204_simyr1850_140204.nc'
 hist_nhtfrq = 0
 hist_mfilt  = 1200
