5.5.1. Namelist NAM_PREP_FLAKE

This namelist information is used to initialize the "FLAKE" sea scheme temperature.

Fortran name Fortran type values default value
XTS_UNIF real none
XUNIF_T_SNOW real min(273.15,XTS_WATER)
XUNIF_T_ICE real min(273.15,XTS_WATER)
XUNIF_T_WML real min(273.15,XTS_WATER)
XUNIF_T_BOT real TS_WATER or 277.15 if TS_WATER ≤ 273.15
XUNIF_T_B1 real TS_WATER-0.1 or 277.05 if TS_WATER ≤ 273.15
XUNIF_CT real 0.5
XUNIF_H_SNOW real 0.
XUNIF_H_ICE real 0. or 0.01 if XTS_WATER < 273.15
XUNIF_H_ML real XWATER_DEPTH or XWATER_DEPTH/2 if TS_WATER < 273.15
XUNIF_H_B1 real 0.
CFILE_FLAKE string of 28 characters CFILE in NAM_PREP_SURF_ATM
CTYPE string of 6 characters 'MESONH', 'GRIB ' , 'ASCII ,'LFI ' CFILETYPE in NAM_PREP_SURF_ATM
CFILEPGD_FLAKE string of 28 characters CFILEPGD in NAM_PREP_SURF_ATM
CTYPEPGD string of 6 characters 'MESONH', 'GRIB ' , 'ASCII ','LFI ' CFILEPGDTYPE in NAM_PREP_SURF_ATM
LCLIM_LAKE logical F
NYEAR integer none
NMONTH integer none
NDAY integer none
XTIME real none
LWAT_SBL logical F

  • XTS_UNIF : uniform prescribed value of water surface temperature supposed at an altitude of 0m (mean sea level altitude). The temperature is then modified for each point depending on its altitude, following a uniform vertical gradient of -6.5 K km-1. This prescribed value, if defined, has priority on the use of CFILE_FLAKE data.
  • XUNIF_T_SNOW : surface temperature of snow (K)
  • XUNIF_T_ICE : surface temperature at the ice-atmosphere or at the ice-snow interface (K)
  • XUNIF_T_WML : mixed-layer temperature (K)
  • XUNIF_T_BOT : water temperature at the bottom of the lake (K)
  • XUNIF_T_B1 : temperature at the bottom of the upper layer of sediments (K)
  • XUNIF_CT : shape factor (thermocline)
  • XUNIF_H_SNOW : snow layer thickness (m)
  • XUNIF_H_ICE : ice layer thickness (m)
  • XUNIF_H_ML : thickness of the mixed-layer (m)
  • XUNIF_H_B1 : thickness of the upper level of the active sediments (m)
  • CFILE_FLAKE / CFILEPGD_FLAKE: name of the PREP and PGD files used to define the Sea surface Temperature. The use of a file or prescribed value XTS_WATER_UNIF has priority on the data in CFILE_FLAKE file.
  • CTYPE / CTYPEPGD: type of the CFILE_FLAKE / CFILEPGD_FLAKE files, if the latter is provided. CTYPE / CTYPEPGD 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
    • "ASCII" : Surfex PREP / PGD ASCII file
    • "LFI " : Surfex PREP / PGD LFI file
  • LCLIM_LAKE : to use the climatological lake database to initialise FLAKE pronostic variables. Needs to link with LAKE_LTA_NEW.nc.
  • NYEAR : year of surface UTC time. It is used only if no atmospheric file or no surface file is given (in those the date can be read).
  • NMONTH : month of surface UTC time. It is used only if no atmospheric file or no surface file is given (in those the date can be read).
  • NDAY : day of surface UTC time. It is used only if no atmospheric file or no surface file is given (in those the date can be read).
  • XTIME : time from midnight of surface UTC time. It is used only if no atmospheric file or no surface file is given (in those the date can be read). (seconds).
  • LWAT_SBL : activates surface boundary multi layer scheme over inland water.