6.2.5. Namelist NAM_SEAICEn
Please read first 6.2.3. Sea-ice schemes
When a letter show in first column, the settings described will apply only under a given condition :
- "G": apply if an explicit sea-ice scheme is set in PREP (e.g. GELATO)
NG | Fortran name | Fortran type | Values | Default value | Units |
---|---|---|---|---|---|
CINTERPOL_SIC | character* | ’NONE’, ’UNIF’, ’LINEAR’ | ’NONE ’ | ||
XCD_ICE_CST | float | 0 (bulk) | |||
LDIAG_MISC_SEAICE | logical | T/F | T | ||
G | XSEAICE_TSTEP | float | SEA_TSTEP | s | |
G | XSI_FLX_DRV | float | -20. | W m-2 K-1 | |
G | XSIC_EFOLDING_TIME | float | 0. | days | |
G | CINTERPOL_SIT | character* | ’NONE’, ’UNIF’, ’LINEAR’ | ’NONE ’ | |
G | XSIT_EFOLDING_TIME | float | ≥0. | 0. | days |
G | XFREEZING_SST | float | -1.8 | Celsius |
Common settings
- CINTERPOL_SIC : Type of interpolation of Sea Ice cover external fields. This applies whatever the role of these external fields : constraint fields (when CSEAICE_SCHEME=GELATO) or forcing fields (when value is CSEAICE_SCHEME=NONE and some interpolation is set)
- XCD_ICE_CST : Turbulent exchange coefficient value for drag, heat and vapor on sea-ice. Default is 0 and means : apply a bulk formula.
- LDIAG_MISC_SEAICE : should we output sea-ice diagnostics ? default to T is sea-ice cover is handled
Gelato parameters
- XSEAICE_TSTEP : Time step for the Gelato sea-ice scheme. If not set, use the same time step as the SEA scheme
- XSI_FLX_DRV : Derivative of the non-solar fluxes w.r.t. sea-ice temperature; allows Gelato to compute this flux on various ice categories, as long as Surfex handles only one sea-ice category.
- XSIC_EFOLDING_TIME: If >0, a damping of sea-ice cover will occur in Gelato, with this e-folding time. The sea-ice cover constraint is the data provided in the PREP file, interpolated in time according to CINTERPOL_SIC setting, or, as a default, the interpretation of SST data using XFREEZING_SST. [ note for Gelato wizzards : the Surfex default Gelato option for damping is "MONO" ]
- CINTERPOL_SIT : Type of interpolation of Sea Ice thickness constraint, in Gelato.
- XSIT_EFOLDING_TIME : If >0, a damping of sea-ice thickness will occur in Gelato, with this e-folding time. The sea-ice thickness constraint is the data provided in the PREP file [ note for Gelato wizzards : the Surfex default Gelato option for damping is "MONO_ADD" ]
- XFREEZING_SST : Arbitrary SST freezing point . Indicates where the SST data you provide can be interpreted by Gelato as locations covered with sea-ice, if no SIC constraint field is provided. SST passed to Gelato will also anyway then be set there to the actual, salinity-dependant, freezing point.