Home > User’s guide > 8. Externalized surface diagnostics > 8.2. Diagnostics relative to the general surface monitor and to each (...) > 8.2.1. Namelist NAM_DIAG_SURFn

8.2.1. Namelist NAM_DIAG_SURFn

Fortran name Fortran type values default value
N2M integer 0, 2 2
LSURF_BUDGET logical .FALSE.
LSURF_BUDGETC logical .FALSE.
LRESET_BUDGETC logical .FALSE.
LRAD_BUDGET logical .FALSE.
LCOEF logical .FALSE.
LSURF_VARS logical .FALSE.
L2M_MIN_ZS logical .FALSE.

  • N2M : flag to compute surface boundary layer characteristics:
    • N2M=2 : computes temperature at 2 m, specific humidity at 2 m, relative humidity, zonal and meridian wind at 10 m, and Richardson number. 2m and 10m quantities are calculated interpolating between atmospheric forcing variables and surface temperature and humidity.
  • LSURF_BUDGET: flag to save in the output file the terms of the surface energy balance (net radiation, sensible heat flux, latent heat flux, ground flux), for each scheme (on the four separate tiles), on each patch of the vegetation scheme if existing, and aggregated for the whole surface. The diagnosed fields are (* stands for the scheme considered (*=nothing : field aggregated on the whole surface;*=name of a scheme : field for this scheme):
    • RN_* : net radiation
    • H_* : turbulent sensible heat flux
    • LE_* : turbulent latent heat flux
    • GFLUX_*: ground or storage heat flux
    • FMU_* : zonal wind stress
    • FMV_* : meridian wind stress
      If both LSURF_BUDGET and LRAD_BUDGET are T then downward and upward shortwave radiation per spectral band will be written into output file (they are computed even if LRAD_BUDGET is false). The following output fields are then available:
    • SWD_* : downward short wave radiation
    • SWU_*: upward short wave radiation
    • SWBD_* : downward short wave radiation for each spectral band
    • SWBU_* : upward short wave radiation for each spectral band
    • LWD_*:downward long wave radiation
    • LWU_* : upward long wave radiation
  • LSURF_BUDGETC: flag to save in the output file the time integrated values of all budget terms that have been activated
  • LRESET_BUDGETC: flag to reset cumulatives variables at the beginning of a run
  • LCOEF: flag to save in the output file the transfer coefficients used in the computation of the surface energy fluxes, for each scheme (on the four separate tiles) and aggregated for the whole surface. The diagnosed fields are (* stands for the scheme considered (*=nothing : field aggregated on the whole surface; *=name of a scheme : field for this scheme):
    • CD_* : drag coefficient for momentum
    • CH_* : drag coefficient for heat
    • CE_* : drag coefficient for evaporation (differs from CH only over sea)
    • Z0_* : roughness length
    • Z0H_* : thermal roughness length
  • LSURF_VARS: flag to save in the output file the surface specific humidity for each scheme (on the four separate tiles), on each patch of the vegetation scheme if existing. The diagnosed fields are (* stands for the scheme considered (*=nothing : field aggregated on the whole surface; *=name of a scheme :< field for this scheme):
    • QS_* : specific humidity
  • L2M_MIN_ZS: flag for 2 meters quantities evaluated on the minimum orographyy of the grid

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SURFEX (CNRM)