CAM build directory; contains .o and .mod files. Directory where CAM executable will be created. Root directory of CAM source distribution. User source directories to prepend to the filepath. Multiple directories are specified as a comma separated list with no embedded white space. Switch specifies whether CAM is being built by the CCSM sequential scripts. 0 => no, 1 => yes. Component interfaces: mct or esmf. Default: mct. Dynamics package: eul, sld, fv, or homme. Switch to turn on waccm physics: 0 => no, 1 => yes. Switch to turn on FV offline driver: 0 => no, 1 => yes. Option to turn on waccmx thermosphere/ionosphere extension: 0 => no, 1 => yes Radiation driver : 0 => no, 1 => yes. Physics package: cam3, cam4, cam5, ideal (Held-Suarez forcings), adiabatic. Microphysics package: rk (Rasch and Kristjansson), mg (Morrison and Gettelman two moment scheme). Macrophysics package: RK, Park, CLUBB_SGS. Switch to turn on/off CLUBB_SGS package: 0 => no, 1 => yes PBL package: uw (University of Washington), hb (Holtslag and Boville), hbr (Holtslag, Boville, and Rasch), clubb_sgs. Radiative transfer calculation: camrt (CAM3 and CAM4 RT package), rrtmg (RRTMG package from AER). CARMA sectional microphysics: none (disabled), bc_strat (Stratospheric Black Carbon), cirrus (Cirrus Clouds), dust (Dust), meteor_smoke (Meteor Smoke), pmc (Polar Mesospheric Clouds), sea_salt (Sea Salt), sulfate (Sulfate Aerosols), test_detrain (Detrainment), test_growth (Particle Growth), test_passive (Passive Dust), test_radiative (Radiatively Active Dust), test_swelling (Sea Salt), test_tracers (age trajectories). Chemistry package: waccm_mozart, waccm_mozart_v1, waccm_mozart_mam3, waccm_mozart_sulfur, waccm_ghg, trop_mozart, trop_mozart_mam3, trop_mozart_soa, trop_strat_bam_v1, trop_strat_mam3, trop_strat_mam7, super_fast_llnl, trop_ghg, trop_bam, trop_mam3, trop_mam7, or none. Prognostic mozart species packages: list of any subset of the following: DST,SSLT,SO4,GHG,OC,BC,CARBON16 Switch to allow user to edit chem mechanism file: 0 => no, 1 => yes. Path and file name of the user supplied chemistry mechanism file. Chemistry preprocessor build directory; contains .o and .mod files. Chemistry source directory generated by the chemistry preprocessor; contains F90 files. Chemistry source directory; contains F90 files. Use clm, stub land or no lnd model in cam build: clm, slnd, none Use rtm, stub runoff or no runoff model in cam build: rtm, srof, none Use data ocean model (docn or dom), stub ocean (socn), or aqua planet ocean (aquaplanet) in cam build. When built from the CESM scripts the value of ocn may be set to pop2, but this doesn't impact how CAM is built. Use cice, stub ice model or no ice model in cam build: cice, sice, none mode of cice to be used in stand-alone cam test suite if cice_mode is prescribed, input type forcing for prescribed mode cice grid is same as cam grid Type of cice decomposition. Filename for the CICE config_cache file. Directory name for the CICE config_cache file. Turn on CO2 cycle in biogeochemistry model: 0 => no, 1 => yes. Modifications that allow perturbation growth testing: 0=off, 1=on. Configure CAM for single column mode: 0=off, 1=on. This option only supported for the Eulerian dycore. Configure CAM to generate an IOP file that can be used to drive SCAM: 0=no, 1=yes. This option only supported for the Eulerian dycore. Horizontal grid specifier. The recognized values depend on the dynamics type and are contained in the config_horiz_grid.xml file. Number of unique longitude points in rectangular lat/lon grid. Number of unique latitude points in rectangular lat/lon grid. Number of elements along one edge of a cubed sphere grid. Number of points on each edge of the elements in a cubed sphere grid. Number of vertical levels. Total number of advected constituents. By default this is computed by configure. However, configure has a commandline argument to allow the user to override the default. Total number of advected test tracers. Switch on (off) age of air tracers: 0=off, 1=on. Maximum Fourier wavenumber. Highest degree of the Legendre polynomials for m=0. Highest degree of the associated Legendre polynomials. Maximum number of columns in a chunk (physics data structure). Name of CAM executable. User specified CPP defines to append to Makefile defaults. User specified C compiler overrides Makefile default (linux only). User specified C compiler options to append to Makefile defaults. User specified Fortran compiler overrides Makefile default. Type of Fortran compiler. Used when -fc specifies a generic wrapper script such as mpif90 or ftn. Switch to enable debugging options for Fortran compiler: 0=off, 1=on. User specified Fortran compiler flags to append to Makefile defaults. User specified Fortran optimization flags to override Makefile defaults. User specified linker. Overrides the Makefile default $(FC). User specified load options to append to Makefile defaults. Switch to enable or disable building SPMD version of CAM: 0=off, 1=on. Number of MPI tasks. This is used to determine default grid decompositions. Currently only used by CICE. Switch to enable or disable building SMP version (OPENMP) of CAM: 0=off, 1=on. Number of OMP threads. This is used to determine default grid decompositions. Currently only used by CICE. Directory containing NetCDF include files. Directory containing NetCDF library. Directory containing NetCDF module files. Directory containing pNetCDF include files. Directory containing pNetCDF library. Directory containing LAPACK library. Directory containing ESMF library (for linking to external ESMF). Version of ESMF library. Directory containing MCT library (for linking to external MCT). Directory containing MPI include files. Directory containing MPI library. Name of MPI library. Switch to enable building COSP simulator package. 1 => build COSP. Directory containing COSP library. OS for which CAM is being built. The default value is the name contained in Perl's $OSNAME variable. This parameter allows the user to override that setting to allow for cross-compilation, and for instances where the $OSNAME value is too generic. For example, currently on both cray-xt and bluegene systems $OSNAME has the value "linux".