5.7.6. Namelist NAM_PREP_GREENROOF_SNOW

This namelist defines the type of snow scheme used in GARDEN scheme.

Fortran name Fortran type values default value
CSNOW_GR string of 3 characters 'D95', '3-L', 'EBA' '3-L'
NSNOW_LAYER_GR integer 3
CFILE_SNOW_GR string of 28 characters CFILE_GR in NAM_PREP_TEB_GREENROOF
CTYPE_SNOW string of 6 characters 'MESONH', 'GRIB ', 'LFI ' ,'ASCII ' CTYPE in NAM_PREP_TEB_GREENROOF
CFILEPGD_SNOW_GR string of 28 characters CFILEPGD_GR in NAM_PREP_TEB_GREENROOF
CTYPEPGD_SNOW string of 6 characters 'MESONH', 'LFI ' ,'ASCII' CTYPEPGD in NAM_PREP_TEB_GREENROOF
LSNOW_IDEAL_GR logical .FALSE.
XWSNOW_GR real(20) 0.
XZSNOW_GR real(20) 1.E+20
XTSNOW_GR real(20) 273.16
XLWCSNOW_GR real(20) 0.
XRSNOW_GR real(20) 300.
XASNOW_GR real 0.5

  • CSNOW_GR : type of snow scheme. Possible snow schemes are:
    1. 'D95' : Douville et al (1995) snow scheme.
    2. '3-L' : Boone and Etchevers (2000) three layers snow scheme.
    3. 'EBA' : Bogatchev and Bazile (2005), Arpege operational snow scheme.
  • NSNOW_LAYER_GR : number of snow layers
  • CFILE_SNOW_GR : name of the file used to define the snow profiles. The use of a file or prescribed value of XRSNOW_GR, XTSNOW_GR, XWSNOW_GR and XASNOW_GR has priority on the data in CFILE_SNOW_GR file
  • CTYPE_SNOW : type of the CFILE_SNOW_GR file, if the latter is provided. CTYPE_SNOW must then be given. The following values are currently usable:
    • "MESONH" : the file type is a MESONH file.
    • "GRIB " : the file type is a GRIB file, coming from any of these models:
      1. "ECMWF " : european center forecast model
      2. "ARPEGE" : Arpege french forecast model
      3. "ALADIN" : Aladin french forecast local model
      4. "MOCAGE" : Mocage french research chemistry model
    • "LFI " : LFI PREP file
    • "ASCII": ASCII PREP FILE
  • CFILEPGD_SNOW_GR : name of the associated PGD file if CFILE_SNOW_GR is a PREP files.
  • CTYPEPGD_SNOW : type of the CFILEPGD_SNOW file, if the latter is provided. CTYPEPGD_SNOW must then be given. The following values are currently usable:
    • "MESONH" : the file type is a MESONH file.
    • "LFI " : LFI PREP file
    • "ASCII": ASCII PREP FILE
  • LSNOW_IDEAL_GR : if LSNOW_IDEAL_GR = .FALSE. , only one value can be given for following snow parameters and a vertical interpolation is processed. If LSNOW_IDEAL_GR = .TRUE., values are given for each layer and there is no vertical interpolation performed.
  • XWSNOW_GR : uniform value to initialize snow content, one for each layer
  • XZSNOW_GR : uniform value to initialize snow depth, one for each layer (m)
  • XTSNOW_GR : uniform value to initialize snow temperature, one for each layer
  • XLWCSNOW_GR : uniform value to initialize snow liquid water content, one for each layer (kg/m3)
  • XRSNOW_GR : uniform value to initialize snow density, one for each layer
  • XASNOW_GR : uniform value to initialize snow albedo

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