Bitwise Considerations

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1. assim_tools_mod.f90:
   lanai_bitwise = .true. This is hard coded to false because it is very slow to be bitwise with Lanai. lanai_bitwise = .true. causes the vertical conversion of observations to be done in get_close_obs inside the sequential obs do loop. See vertical conversion for details about this change.
2. filter_nml:
   output_forward_op_errors = .true. This will cause the forward operator code to calculate all forward operators, even if some ensemble members fail.
3. mkmf:
   ifort fp-model precise
   In general use the debugging FLAGS in the mkmfs provided with DART.
4. sampling_error_correction:
   Use the sampling_error_correction_table.Lanai.nc from the assimilation_code/programs/system_simulation/work directory. These values are identical to the Lanai release.
5. posterior inflation:
   Try to avoid testing cases which use posterior inflation. The posterior inflation has additional code in the Manhattan version compared to Lanai. If you need to test a case that has posterior, copy assim_tools/assim_tools_mod.f90 from the 'classic' release to your Lanai build, and run your test against that version.

Important

The CAM and bgrid_solo model_mods have been altered so the state is in a different order inside filter. Thus DART format restarts will not be bitwise with Lanai DART format restarts, but netcdf files will be (after running dart_to_cam).

Terms of Use

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