NAM_SURF_CSTS

Warning

This namelist comes from SURFEX 9.0.0 user guide https://www.umr-cnrm.fr/surfex/IMG/pdf/surfex_tecdoc.pdf.

NAM_SURF_CSTS content

Fortran name	Fortran type	Default value
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	300.0
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