3 Simulation

The following scripts are provided by the author for running CESM with the transient urban albedo functionality.

Modify Job Script

• transient_urbanalbedo_roof: If true, roof albedo changes over time.

  • stream_fldFileName_urbanalbtvroof: Filename of input stream data for time varying urban roof albedo

  • stream_meshfile_urbanalbtvroof: Mesh filename of input stream data for time varying urban roof albedo

  • stream_year_first_urbanalbtvroof: First year to loop over for urban time varying roof albedo

  • stream_year_last_urbanalbtvroof: Last year to loop over for urban time varying roof albedo

  • model_year_align_urbanalbtvroof: Simulation year that aligns with stream_year_first_urbanalbtvroof value

  • urbanalbtvroofmapalgo: Spatial mapping method from urban time varying roof albedo file to the model resolution.

    • Please note that the spatial mapping method has been updated in the latest CTSM versions. Please refer to ERROR: map algo copy is not supported and supported mapping algorithms

      • bilinear

      • redist

      • nn

      • consf

      • consd

      • none

• transient_urbanalbedo_improad: If true, impervious road albedo changes over time.

• transient_urbanalbedo_wall: If true, wall albedo changes over time

• Define the albedo stream input. Please refer to the last section 2 Surface Input.

  # For example
  echo "transient_urbanalbedo_roof = .true.">> user_nl_clm
  echo "fsurdat='${SURF}'" >> user_nl_clm
  echo "stream_fldFileName_urbanalbtvroof = '${INPUT}/dyn_alb_roof_0.9x1.25_simyr2020-2025_c240930.nc'">> user_nl_clm 
  echo "stream_meshfile_urbanalbtvroof = '${INPUT}/lnd_mesh.nc'"
  echo "stream_year_first_urbanalbtvroof = 2000" >> user_nl_clm
  echo "stream_year_last_urbanalbtvroof = 2025" >> user_nl_clm
  echo "model_year_align_urbanalbtvroof = 2000" >> user_nl_clm
  echo "urbanalbtvroofmapalgo = 'nn'" >> user_nl_clm