Linear_wind_LUT.nc created every time about icar

[gutmann]

I'm not sure I quite understand what is happening. It has to create the LUT in memory, but it shouldn't write the file if write_LUT is false. Are you sure it is reading the namelist you have edited? When it writes the LUT to disk, does it print anything to the screen?

The relevant code is here: https://github.com/NCAR/icar/blob/master/physics/linear_winds.f90#L991

if ((options%lt_options%write_LUT).and.(.not.reverse)) then
  if ((options%lt_options%read_LUT) .and. (error == 0)) then
    print*, "Not writing Linear Theory LUT to file because LUT was read from file"
  else
    print*, "Writing Linear Theory LUT to file: ", trim(options%lt_options%u_LUT_Filename)
    error = write_LUT(options%lt_options%u_LUT_Filename, hi_u_LUT, hi_v_LUT, options%dz_levels, options%lt_options)
  endif
endif

[gutmann]

Or do you just mean that it is recomputing the LUT even when it should be reading it from disk? It should print out some information if it is or is not able to read the LUT. Do you get such an error message?

see https://github.com/NCAR/icar/blob/master/physics/linear_winds.f90#L903

  print*, "Reading LUT from file: ", trim(options%lt_options%u_LUT_Filename)
  error = read_LUT(options%lt_options%u_LUT_Filename, hi_u_LUT, hi_v_LUT, options%dz_levels, LUT_dims, options%lt_options)
  if (error/=0) then
    write(*,*) "WARNING: LUT on disk does not match that specified in the namelist or does not exist."
    write(*,*) "    LUT will be recreated"

I have attached a log and my namelist of the icar run. ICAR was compiled using MODE=debug. I think the error at the end might have to do with the compile option as just using 'make' results in a failed build, but 'make MODE=debug' is successful.

cfs_icar_options.nml.txt

icar_log.txt

[gutmann]

ah, this probably isn't as clear as it should be. Many of the namelists are not even read if you dont' set the corresponding "use_X_options" to true in the main parameter namelist. In this case, you need to set use_lt_options=true so that it will read the options related to linear theory.

https://github.com/NCAR/icar/blob/master/run/complete_icar_options.nml#L164

It would help if I read every line of the full options namelist. Maybe I will add this to the docs or FAQ