The namelist parameters listed in Table 7 are for initial condition, restart, and history file and directory information. During execution, the ice model reads grid and land mask information from the files grid_file and kmt_file that should be located in the executable directory. There are commands in the scripts that copy these files from the input data directory, rename them from global_$ICE_GRID.grid and global_$ICE_GRID.kmt to the default filenames shown in Table 7.
The namelist variable pointer_file is set to the name of the pointer file containing the restart file name that will be read when model execution begins. The pointer file resides in the scripts directory and is created initially by the ice setup script but is overwritten every time a new restart file is created. It will contain the name of the latest restart file. The default filename ice.restart_file shown in Table 7 will not work unless some modifications are made to the ice setup script and a file is created with this name and contains the name of a valid restart file; this variable must be set in the namelist. More information on restart pointer files can be found in section 8.2.
incond_dir, restart_dir and history_dir are the directories where the initial condition file, the restart files and the history files will be written, respectively. These values are set at the top of the setup script and have been modified from the default values to meet the requirements of the CCSM filenaming convention. This allows each type of output file to be written to a separate directory. If the default values are used, all of the output files will be written to the executable directory.
incond_file, dump_file and history_file are the root filenames for the initial condition file, the restart files and the history files, respectively. These strings have been determined by the requirements of the CCSM filenaming convention, so the default values listed in Table 7 are not the same as those shown in the namelist in Section 4.8.1. See sections 8.2 and 8.3 for an explanation of how the rest of the filename is created.
| Varible Name | Type | Default Value | Description |
oceanmixed_ice |
Logical | .false. | If true, run model with ocean mixed layer model. |
| oceanmixed_ice_file | Character | 'oceanmixed_ice.nc' | Name of file with ocean mixed layer data. |
| oceanmixed_ice_sst_init | Logical | .false. | If true, Jan 1 sst is read from forcing file. |
| prntdiag_oceanmixed | Logical | .false. | If true, print ocean mixed layer diagnostics. |