This is a configuration file for building CAM. It is the file format produced by the configure script to store a build configuration. It may also be read by the configure script (via setting the -defaults option) to provide a default build configuration. This file may be edited by hand to quickly customize a configuration. If hand editing is done it should be recognized that XML parser used to read this file is not able to check the file for valid syntax. Also, the current parser places some restrictions on the normally valid XML syntax: 1. Attribute values must be enclosed in DOUBLE QUOTED STRINGS!!! cam_bld CAM build directory, contains .o and .mod files cam_exedir Directory where CAM executable will be created cam_root Root directory of CAM distribution esmf_bld Build directory for ESMF, only needed if ESMF lib will be built esmf_root Root directory of ESMF distribution, only needed if ESMF lib will be built usr_src User source directories to prepend to the filepath. Multiple directories are specified as a comma separated list with no embedded white space. dyn Dynamics package: eul, sld, or fv phys Physics package: cam1 or ccm366 lnd Land model: clm2 or lsm. Currently this value depends on the phys value as follows: cam1 => clm2, ccm366 => lsm. ocn Use SST data or slab ocean model: dom or som sice Sea ice package: csim4 or ccmice pergro Use modifications that allow perturbation growth testing 0 => no, 1 => yes res Horizontal grid resolution. Spectral dycores use Gaussian grids are specified by nlat x nlon. The finite volume dycore uses an equally spaced grid that includes pole points and is specified as lat_cell_size x lon_cell_size in degrees. nlon Number of longitude grid points nlat Number of latitude grid points nlev Number of vertical levels nadv Number of advected constituents nnadv Number of non-advected constituents trm Maximum Fourier wavenumber trn Highest degree of the Legendre polynomials for m=0 trk Highest degree of the associated Legendre polynomials pcols Maximum number of columns in a chunk twod_yz Switch to enable or disable use of 2D Y-Z parallel decomposition (only used for FV dynamics) cam_exe Name of CAM executable cc User specified C compiler overrides Makefile default. fc User specified Fortran compiler overrides Makefile default. debug Switch to enable debugging options for Fortran compiler. fflags User specified Fortran compiler options to append to Makefile defaults. spmd Switch to enable or disable building SPMD version of CAM. smp Switch to enable or disable building SMP version of CAM. nc_inc Directory containing NetCDF include files. nc_lib Directory containing NetCDF library. mpi_inc Directory containing MPI include files. mpi_lib Directory containing MPI library.