6.1.1. Namelist NAM_SURF_CSTS


Fortran name Fortran type values default value REPROD_OPER / NOT
XEMISSN real 1.0 /0.99
XANSMIN real 0.5
XANSMAX real 0.85
XAGLAMIN real 0.8
XAGLAMAX real 0.85
XALBWAT real 0.135/0.065
XALBCOEF_TA96 real 0.037
XALBSCA_WAT real 0.06
XEMISWAT real 0.98/0.96
XALBWATICE real 0.85/0.40
XEMISWATICE real 1.0/0.97
XHGLA real 33.3
XWSNV real 5.0
XCFFV real 4.0
XZ0SN real 0.001
XZ0HSN real 0.0001
XTAU_SMELT real 300.
XALBSEAICE real 0.85/0.71
XZ0FLOOD real 0.0002
XALBWATSNOW real 0.85/0.60
XTAU_LW real 0.5

  • XEMISSN : snow emissivity (default depends of LREPROD_OPER flag)
  • XANSMIN : minimum value for snow albedo
  • XANSMAX : maximum value for snow albedo
  • XAGLAMIN : minimum value for permanent snow/ice albedo
  • XAGLAMAX : maximum value for permanent snow/ice albedo
  • XALBWAT : water direct albedo (default depends of LREPROD_OPER flag)
  • XALBCOEF_TA96 : coefficient used in th computation of albedo if 'TA96' option selected
  • XALBSCA_WAT : water diffuse albedo
  • XEMISWAT: water emissivity (default depends of LREPROD_OPER flag)
  • XALBWATICE : water ice albedo (default depends of LREPROD_OPER flag)
  • XEMISWATICE : sea ice emissivity (default depends of LREPROD_OPER flag)
  • XHGLA : Height of aged snow in glacier case (allows Pn=1)
  • XWSNV : Coefficient for calculation of snow fraction over vegetation
  • XZ0SN : roughness length of pure snow surface (m)
  • XZ0HSN:roughness length for heat of pure snow surface (m)
  • XTAU_SMELT: snow melt timescale with D95 (s): needed to prevent time step dependence of melt when snow fraction < unity.
  • XCFFV : Coefficient for calculation of floodplain fraction over vegetation
  • XALBSEAICE : sea ice albedo (default depends of LREPROD_OPER flag)
  • XZ0FLOOD : flood z0
  • XALBWATSNOW : snow albedo over water bodies or lakes (default depends of LREPROD_OPER flag)
  • XTAU_LW : Extinction coefficient for view factor for long-wave radiation

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