6. The JULES namelist files

Each run of JULES is controlled by a number of files containing Fortran namelists. These files specify details including:

• Switches to allow different model configurations to be selected at run-time.
• Start and end times for the run.
• What input data to use and how to read it.
• How to construct the model grid.
• Values for various parameters.
• The required output.

These files have specific names, and JULES expects all these files to exist for every run (even when their contents are not required). JULES also expects that the namelists within each file appear in the order given below.

• 6.1. Introduction to Fortran namelists
• 6.2. jules_surface_types.nml
  • 6.2.1. JULES_SURFACE_TYPES namelist members
• 6.3. jules_surface.nml
  • 6.3.1. JULES_SURFACE namelist members
• 6.4. jules_radiation.nml
  • 6.4.1. JULES_RADIATION namelist members
• 6.5. jules_hydrology.nml
  • 6.5.1. JULES_HYDROLOGY namelist members
• 6.6. jules_soil.nml
  • 6.6.1. JULES_SOIL namelist members
• 6.7. jules_vegetation.nml
  • 6.7.1. JULES_VEGETATION namelist members
• 6.8. jules_soil_biogeochem.nml
  • 6.8.1. JULES_SOIL_BIOGEOCHEM namelist members
• 6.9. jules_soil_ecosse.nml
  • 6.9.1. JULES_SOIL_ECOSSE namelist members
• 6.10. jules_snow.nml
  • 6.10.1. JULES_SNOW namelist members
  • 6.10.2. Example of the evolution of snow layer thickness
• 6.11. jules_rivers.nml
  • 6.11.1. JULES_RIVERS namelist members
• 6.12. timesteps.nml
  • 6.12.1. JULES_TIME namelist members
  • 6.12.2. JULES_SPINUP namelist members
  • 6.12.3. Note on time conventions
  • 6.12.4. Note on solar zenith angle
  • 6.12.5. Examples
  • 6.12.6. Notes on spin-up
• 6.13. model_grid.nml
  • 6.13.1. JULES_INPUT_GRID namelist members
  • 6.13.2. JULES_LATLON namelist members
  • 6.13.3. JULES_LAND_FRAC namelist members
  • 6.13.4. JULES_MODEL_GRID namelist members
  • 6.13.5. JULES_SURF_HGT namelist members
  • 6.13.6. JULES_Z_LAND namelist members
  • 6.13.7. Examples
• 6.14. ancillaries.nml
  • 6.14.1. JULES_FRAC namelist members
  • 6.14.2. JULES_SOIL_PROPS namelist members
  • 6.14.3. JULES_TOP namelist members
  • 6.14.4. JULES_PDM namelist members
  • 6.14.5. JULES_AGRIC namelist members
  • 6.14.6. JULES_CROP_PROPS namelist members
  • 6.14.7. JULES_IRRIG namelist members
  • 6.14.8. JULES_RIVERS_PROPS namelist members
  • 6.14.9. JULES_CO2 namelist members
• 6.15. pft_params.nml
  • 6.15.1. JULES_PFTPARM namelist members
• 6.16. nveg_params.nml
  • 6.16.1. JULES_NVEGPARM namelist members
• 6.17. crop_params.nml
  • 6.17.1. JULES_CROPPARM namelist members
• 6.18. triffid_params.nml
  • 6.18.1. JULES_TRIFFID namelist members
• 6.19. urban.nml
  • 6.19.1. JULES_URBAN_SWITCHES namelist members
  • 6.19.2. JULES_URBAN2T_PARAM namelist members
  • 6.19.3. URBAN_PROPERTIES namelist members
• 6.20. fire.nml
  • 6.20.1. FIRE_SWITCHES namelist members
• 6.21. drive.nml
  • 6.21.1. JULES_DRIVE namelist members
  • 6.21.2. Examples of specifying driving data
• 6.22. imogen.nml
  • 6.22.1. IMOGEN_RUN_LIST namelist members
  • 6.22.2. IMOGEN_ANLG_VALS_LIST namelist members
• 6.23. prescribed_data.nml
  • 6.23.1. JULES_PRESCRIBED namelist members
  • 6.23.2. JULES_PRESCRIBED_DATASET namelist members
• 6.24. initial_conditions.nml
  • 6.24.1. JULES_INITIAL namelist members
  • 6.24.2. Examples of specification of initial state
• 6.25. output.nml
  • 6.25.1. JULES_OUTPUT namelist members
  • 6.25.2. JULES_OUTPUT_PROFILE namelist members
  • 6.25.3. Example of requesting output