Specifies either clm4_0, clm4_5, or clm5_0 physics CLM 4.0 Only. For CLM 4.5/5.0, spinup is controlled from build-namelist. Spinup mode for the CN Carbon Nitrogen BGC model AD turn on accelerated decomposition spinup for CN biogeochemistry model exit jump from AD spinup mode to normal mode normal no acceleration of decompositon (i.e. "final spinup") Toggle to turn on calculation of SNow and Ice Aerosol Radiation model (SNICAR) radiative forcing (SNICAR_FRC .true.is EXPERIMENTAL NOT SUPPORTED!) Flag to turn on site specific special configuration flags for supported single point resolutions. See the specific config_defaults_*.xml file for the special settings that are set for a particular site. CLM Biogeochemistry mode none = Satellite Phenology (SP) cn = Carbon Nitrogen model (CN) (or CLM45BGC if phys=clm4_5/clm5_0, vsoilc_centbgc='on', and clm4me='on') cndv = Carbon Nitrogen with Dynamic Global Vegetation Model (CNDV) (or CLM45BGCDV if phys=clm4_5/clm5_0, vsoilc_centbgc='on', and clm4me='on') Toggle to turn on the prognostic crop model Root directory of CLM source distribution (directory above CLM configure). Component framework interface to use (Model Coupling Toolkit, or Earth System Modeling Framework) User source directories to prepend to the filepath. Multiple directories are specified as a comma separated list with no embedded white space. Normally this is SourceMods/src.clm in your case. User specified CPP defines to append to Makefile defaults. Note: It's recommended to use configure options to set standard CPP values rather than defining them here. Maximum number of plant function types (PFT) per gridcell (Setting maxpft to anything other than 17 (or 25 for clm4_5/clm5_0 CROP or 21 for clm4_0 CROP) is EXPERIMENTAL AND NOT SUPPORTED!) (Either 17 for a standard vegetated case or 21 for prognostic clm4_0 CROP or 25 for prognostic clm4_5/clm5_0 CROP) Toggle to make wild-fires inactive for biogeochemistry=CN mode Toggle to turn all history output completely OFF (possibly used for testing)