CESM Component Models Namelist Definitions

Search or Browse CICE Component Model Namelist Variables

This page contains the complete list of CICE namelist variables available. They are grouped by categories designed to aid browsing. Clicking on the name of a variable will display descriptive information. If search terms are entered in the text box below, the list will be condensed to contain only matched variables.

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CICE: Setup Settings

Namelist Variable	Type	Group
`days_per_year` Days per year ( Default: 365)	real	setup_nml
`diagfreq` diagnostic output frequency (10 = once per 10 dt) Default: 48	integer	setup_nml
`dt` time step, s ( Default: 3600)	real	setup_nml
`hist_avg` if true, write time-averages (not snapshots) Default: true	logical	setup_nml
`histfreq` frequency of history output (once per 1,h,d,m,y) Default: 'mxxxx'	char*1(5)	setup_nml
`histfreq_n` frequency of history output (10 = once per 10 h,d,m,y) Default: 1	integer(5)	setup_nml
`history_format` file format ('bin'=binary or 'nc'=netcdf) Default: 'nc' if CPP nc is defined, and 'bin' otherwise	char*80	setup_nml
`ice_ic` Method of ice cover initialization. 'default'=>latitude and sst dependent, 'none'=>no ice, restart filename (must be a full path) Default: 'default'	char*256	setup_nml
`lcdf64` 64 bit offset Default: FALSE	logical	setup_nml
`write_ic` if true, write initial history file Default: false	logical	setup_nml
`xndt_dyn` number of dynamic time steps per thermodynamic time step ( Default: 1.0)	real	setup_nml
`year_init` Initial year. ( Default: 0)	integer	setup_nml

CICE: Grid Settings

Namelist Variable	Type	Group
`grid_file` input file for CICE grid info	char*256	grid_nml
`grid_format` file format ('bin'=binary or 'nc'=netcdf) Default: 'bin'	char*256	grid_nml
`grid_type` type of grid Default: 'rectangular'	char*256	grid_nml
`gridcpl_file` input file for CICE coupling grid info	char*256	grid_nml
`kcatbound` category boundary formula (0 = old, 1 = new) Default: 0	integer	grid_nml
`kmt_file` input file for CICE grid info	char*256	grid_nml

CICE: Decomposition Settings

Namelist Variable	Type	Group
`distribution_type` method to use for distributing blocks Default: cartesian	char*80	domain_nml
`distribution_wght` method to use for distributing blocks Default: block	char*80	domain_nml
`distribution_wght_file` file containing probability distribution for distribution_wght method Default: unknown	char*256	domain_nml
`ew_boundary_type` type of boundary in logical east-west dir Default: cyclic	char*80	domain_nml
`maskhalo_bound` turn on masked halos in state bound Default: true	logical	ice_nml
`maskhalo_dyn` turn on masked halos in subcycling Default: true	logical	ice_nml
`maskhalo_remap` turn on masked halos in tracer halo update in remap Default: true	logical	ice_nml
`maskhalo_stress` turn on masked halos in tripole stress update Default: true	logical	ice_nml
`ns_boundary_type` Default: open	char*80	domain_nml
`processor_shape` method to use for distributing blocks Default: square-pop	char*80	domain_nml
`splitcomm_dyn` allow overlap of computation and communication in subcycling Default: false	logical	ice_nml

CICE: Parameterization Settings

Namelist Variable	Type	Group
`advection` incremental remapping transport scheme Default: 'remap'	char*80	ice_nml
`evp_damping` if true, use damping procedure in evp dynamics Default: false	logical	ice_nml
`kdyn` type of dynamics (1 = evp) Default: 1	integer	ice_nml
`kitd` type of itd conversions (0 = delta, 1 = linear) Default: 1	integer	ice_nml
`krdg_partic` 1 = new participation, 0 = Thorndike et al 75 Default: 1	integer	ice_nml
`krdg_redist` 1 = new redistribution, 0 = Hibler 80 Default: 1	integer	ice_nml
`kstrength` 1 = Rothrock 75 strength, 0 = Hibler 79 Default: 1	integer	ice_nml
`ndte` subcycles per dynamics timestep Default: 120	integer	ice_nml
`yield_curve` Yield curve. Default: ellipse	char*80	ice_nml

CICE: Albedos

Namelist Variable	Type	Group
`albedo_type` albedo parameterization, 'default' ('ccsm3') or 'constant' Default:'default'	char*80	ice_nml
`albicei` near-ir ice albedo for h > ahmax	real	ice_nml
`albicev` visible ice albedo for h > ahmax	real	ice_nml
`albsnowi` cold snow albedo, near IR	real	ice_nml
`albsnowv` cold snow albedo, visible	real	ice_nml

CICE: Short Wave Radiation Settings

Namelist Variable	Type	Group
`dt_mlt_in` melt onset temperature tunable parameter for dEdd albedo	real	ice_nml
`r_snw` snow grain radius tunable parameter for dEdd albedo	real	ice_nml
`rsnw_melt_in` maximum melting snow grain radius tunable parameter for dEdd albedo	real	ice_nml
`shortwave` shortwave method, 'default' ('ccsm3') or 'dEdd' Default:'dEdd'	char*80	ice_nml

CICE: Tracer Settings

Namelist Variable	Type	Group
`tr_aero` Aerosol tracers. Default: TRUE	logical	tracer_nml
`tr_fy` FY area tracer. Default: TRUE	logical	tracer_nml
`tr_iage` Ice age tracer. Default: TRUE	logical	tracer_nml
`tr_pond` Pond volume tracer. Default: TRUE	logical	tracer_nml

CICE: Prescribed Ice Settings (F compset only)

Namelist Variable	Type	Group
`model_year_align` Align stream_year_first with this model year Default: 1	integer	ice_prescribed_nml
`prescribed_ice` use prescribed ice mode if true Default: FALSE	logical	ice_prescribed_nml
`prescribed_ice_fill` true => pice data fill required Default: FALSE	logical	ice_prescribed_nml
`stream_domareaname` domain file: area varname Default: area	char*256	ice_prescribed_nml
`stream_domfilename` domain file name	char*256	ice_prescribed_nml
`stream_dommaskname` domain file: mask varname Default: mask	char*256	ice_prescribed_nml
`stream_domtvarname` domain file: time-dim var name Default: time	char*256	ice_prescribed_nml
`stream_domxvarname` domain file: x-dim var name Default: lon	char*256	ice_prescribed_nml
`stream_domyvarname` domain file: y-dim varname Default: lat	char*256	ice_prescribed_nml
`stream_fldfilename` file name containing sst/ifrac data	char*256(400)	ice_prescribed_nml
`stream_fldvarname` ifrac variable name on sst/ifrac dataset Default: 'ice_cov'	char*256	ice_prescribed_nml
`stream_mapread` Map file to read to map stream data to domain data Default: NOT_SET	char*256	ice_prescribed_nml
`stream_year_first` first year in stream to use Default: 1	integer	ice_prescribed_nml
`stream_year_last` Last year in stream to use Default: 1	integer	ice_prescribed_nml

CICE: History Output Fields Settings

Namelist Variable	Type	Group
`f_aero` Default: xxxxx	char*5	icefields_nml
`f_aeron` Default: xxxxx	char*5	icefields_nml
`f_aice` Default: mxxxx	char*5	icefields_nml
`f_aicen` Default: mxxxx	char*5	icefields_nml
`f_aisnap` Default: mdxxx	char*5	icefields_nml
`f_albice` Default: mxxxx	char*5	icefields_nml
`f_albpnd` Default: mxxxx	char*5	icefields_nml
`f_albsno` Default: mxxxx	char*5	icefields_nml
`f_alidf` Default: mxxxx	char*5	icefields_nml
`f_alidr` Default: mxxxx	char*5	icefields_nml
`f_alvdf` Default: mxxxx	char*5	icefields_nml
`f_alvdr` Default: mxxxx	char*5	icefields_nml
`f_alvl` Default: mxxxx	char*5	icefields_nml
`f_apond` Default: xxxxx	char*5	icefields_nml
`f_apondn` Default: xxxxx	char*5	icefields_nml
`f_ardg` Default: mxxxx	char*5	icefields_nml
`f_congel` Default: mxxxx	char*5	icefields_nml
`f_coszen` Default: mxxxx	char*5	icefields_nml
`f_daidtd` Default: mxxxx	char*5	icefields_nml
`f_daidtt` Default: mxxxx	char*5	icefields_nml
`f_dardg1dt` Default: mxxxx	char*5	icefields_nml
`f_dardg2dt` Default: mxxxx	char*5	icefields_nml
`f_divu` Default: mxxxx	char*5	icefields_nml
`f_dvidtd` Default: mxxxx	char*5	icefields_nml
`f_dvidtt` Default: mxxxx	char*5	icefields_nml
`f_dvirdgdt` Default: mxxxx	char*5	icefields_nml
`f_evap` Default: mxxxx	char*5	icefields_nml
`f_evap_ai` Default: mxxxx	char*5	icefields_nml
`f_faero_atm` Default: mxxxx	char*5	icefields_nml
`f_faero_ocn` Default: mxxxx	char*5	icefields_nml
`f_fcondtop_ai` Default: mxxxx	char*5	icefields_nml
`f_fcondtopn_ai` Default: xxxxx	char*5	icefields_nml
`f_fhocn` Default: mxxxx	char*5	icefields_nml
`f_fhocn_ai` Default: mxxxx	char*5	icefields_nml
`f_flat` Default: mxxxx	char*5	icefields_nml
`f_flat_ai` Default: mxxxx	char*5	icefields_nml
`f_flatn_ai` Default: xxxxx	char*5	icefields_nml
`f_flwdn` Default: mxxxx	char*5	icefields_nml
`f_flwup` Default: mxxxx	char*5	icefields_nml
`f_flwup_ai` Default: mxxxx	char*5	icefields_nml
`f_fmelttn_ai` Default: xxxxx	char*5	icefields_nml
`f_frazil` Default: mxxxx	char*5	icefields_nml
`f_fresh` Default: mxxxx	char*5	icefields_nml
`f_fresh_ai` Default: mxxxx	char*5	icefields_nml
`f_frz_onset` Default: xxxxx	char*5	icefields_nml
`f_frzmlt` Default: mxxxx	char*5	icefields_nml
`f_fs` Default: mxxxx	char*5	icefields_nml
`f_fsalt` Default: mxxxx	char*5	icefields_nml
`f_fsalt_ai` Default: mxxxx	char*5	icefields_nml
`f_fsens` Default: mxxxx	char*5	icefields_nml
`f_fsens_ai` Default: mxxxx	char*5	icefields_nml
`f_fsurf_ai` Default: mxxxx	char*5	icefields_nml
`f_fsurfn_ai` Default: xxxxx	char*5	icefields_nml
`f_fswabs` Default: mxxxx	char*5	icefields_nml
`f_fswabs_ai` Default: mxxxx	char*5	icefields_nml
`f_fswdn` Default: mxxxx	char*5	icefields_nml
`f_fswfac` Default: mxxxx	char*5	icefields_nml
`f_fswthru` Default: mxxxx	char*5	icefields_nml
`f_fswthru_ai` Default: mxxxx	char*5	icefields_nml
`f_fswup` Default: mxxxx	char*5	icefields_nml
`f_fy` Default: mxxxx	char*5	icefields_nml
`f_hi` Default: mxxxx	char*5	icefields_nml
`f_hisnap` Default: mdxxx	char*5	icefields_nml
`f_hs` Default: mxxxx	char*5	icefields_nml
`f_iage` Default: mxxxx	char*5	icefields_nml
`f_icepresent` Default: mxxxx	char*5	icefields_nml
`f_meltb` Default: mxxxx	char*5	icefields_nml
`f_meltl` Default: mxxxx	char*5	icefields_nml
`f_melts` Default: mxxxx	char*5	icefields_nml
`f_meltt` Default: mxxxx	char*5	icefields_nml
`f_mlt_onset` Default: xxxxx	char*5	icefields_nml
`f_opening` Default: mxxxx	char*5	icefields_nml
`f_qi` Default: mxxxx	char*5	icefields_nml
`f_qref` Default: mxxxx	char*5	icefields_nml
`f_qs` Default: mxxxx	char*5	icefields_nml
`f_rain` Default: mxxxx	char*5	icefields_nml
`f_rain_ai` Default: mxxxx	char*5	icefields_nml
`f_shear` Default: mxxxx	char*5	icefields_nml
`f_sig1` Default: mxxxx	char*5	icefields_nml
`f_sig2` Default: mxxxx	char*5	icefields_nml
`f_snoice` Default: mxxxx	char*5	icefields_nml
`f_snow` Default: mxxxx	char*5	icefields_nml
`f_snow_ai` Default: mxxxx	char*5	icefields_nml
`f_sss` Default: mxxxx	char*5	icefields_nml
`f_sst` Default: mxxxx	char*5	icefields_nml
`f_strairx` Default: mxxxx	char*5	icefields_nml
`f_strairy` Default: mxxxx	char*5	icefields_nml
`f_strcorx` Default: mxxxx	char*5	icefields_nml
`f_strcory` Default: mxxxx	char*5	icefields_nml
`f_strength` Default: mxxxx	char*5	icefields_nml
`f_strintx` Default: mxxxx	char*5	icefields_nml
`f_strinty` Default: mxxxx	char*5	icefields_nml
`f_strocnx` Default: mxxxx	char*5	icefields_nml
`f_strocny` Default: mxxxx	char*5	icefields_nml
`f_strtltx` Default: xxxxx	char*5	icefields_nml
`f_strtlty` Default: TRUE	char*5	icefields_nml
`f_tair` Default: mxxxx	char*5	icefields_nml
`f_transix` Default: mxxxx	char*5	icefields_nml
`f_transiy` Default: mxxxx	char*5	icefields_nml
`f_tref` Default: mxxxx	char*5	icefields_nml
`f_trsig` Default: mxxxx	char*5	icefields_nml
`f_tsfc` Default: mxxxx	char*5	icefields_nml
`f_uocn` Default: mxxxx	char*5	icefields_nml
`f_uvel` Default: mxxxx	char*5	icefields_nml
`f_vicen` Default: mxxxx	char*5	icefields_nml
`f_vlvl` Default: mxxxx	char*5	icefields_nml
`f_vocn` Default: mxxxx	char*5	icefields_nml
`f_vrdg` Default: mxxxx	char*5	icefields_nml
`f_vvel` Default: mxxxx	char*5	icefields_nml