NAM_SEAICEn

NAM_SEAICEn content

Fortran name

Fortran type

Default value

CINTERPOL_SIC

CHARACTER(LEN=6)

‘NONE’

XCD_ICE_CST

FLOAT

0 (bulk)

LDIAG_MISC_SEAICE

LOGICAL

T

XSEAICE_TSTEP

FLOAT

SEA_TSTEP

XSI_FLX_DRV

FLOAT

-20.

XSIC_EFOLDING_TIME

FLOAT

CINTERPOL_SIT

CHARACTER(LEN=6)

’NONE ’

XSIT_EFOLDING_TIME

FLOAT

XFREEZING_SST

FLOAT

-1.8

  • "G" : apply if an explicit sea-ice scheme is set in PREP (e.g. GELATO)

  • 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)

    • LINEAR: linear interpolation between 3 months

    • READAY: impose directly daily SIC (sea ice cover)

  • 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

  • XSEAICE_TSTEP : Time step (in s) 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 (in W.m$^{-2}$.K$^{-1}$). Allows Gelato to compute this flux on various ice categories, as long as Surfex handles only one sea-ice category.

  • XSIC_EFOLDING_TIME : If $ge$ 0, a damping of sea-ice cover will occur in Gelato, with this e-folding time (in days). 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.

    • READAY: impose directly daily SIT (sea ice thickness)

  • XSIT_EFOLDING_TIME : If $ge$ 0, a damping of sea-ice thickness will occur in Gelato, with this e-folding time (in days). 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 (in Celsius). 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.