Add test for DFI

[kkeene44]

A new directory contained a restart test for the DFI feature is added.

Directory name: cases/dfi
Variations from "basic" case:

         &dfi_control
           dfi_opt                             = 3,
           dfi_nfilter                         = 7,
           dfi_cutoff_seconds                  = 3600,
           dfi_write_filtered_input            = .true.
           dfi_write_dfi_history               = .false.
           dfi_bckstop_year                    = 2016,
           dfi_bckstop_month                   = 03,
           dfi_bckstop_day                     = 22,
           dfi_bckstop_hour                    = 23,
           dfi_bckstop_minute                  = 00,
           dfi_bckstop_second                  = 00,
           dfi_fwdstop_year                    = 2016,
           dfi_fwdstop_month                   = 03,
           dfi_fwdstop_day                     = 23,
           dfi_fwdstop_hour                    = 00,
           dfi_fwdstop_minute                  = 30,
           dfi_fwdstop_second                  = 00,
         /

• Requires 1 hour backward and 1 hour forward simulations for DFI in first WRF simulation

[kkeene44]

@davegill
I actually thought that was the case too. I do have it turned off in the restart test for the tests I conduct manually, but tested it this way and still got BFB results, so I wasn't sure. You know DFI better than I do, so if you think it should be off, then it definitely should be.

[davegill]

@kkeene44
Kelly,
In the comments section, would you add something that could be a template to follow for your future additions. Such as

1. Directory name: dfi
2. Perturbations from basic:
   . Uses DFI option=3
   . Requires 1 hour backward and 1 hour forward simulations
   . Total time of 2 h 12 min instead of 12 min

You are good at this sort of detailed information. Likely, this will be for your benefit

[davegill]

@kkeene44
Kelly,
Riiight, likely the DFI is not "done" on the restart since we start after the initial time. But for clarity, set the dfi_opt=0 (or zap the whole dfi namelist record) on namelist.input.3.

[davegill]

@kkeene44
Kelly,
I updated the wrf-coop repo (which is what runs the regression tests) to now include both "basic" and "dfi". Choose an existing PR, add the label "Feature" to it (that already exists in the list of available labels), and put in some innocuous change to one of the *.F or Registry files that are already being updated. That should trigger a jenkins test with your new DFI restart feature addition.

[kkeene44]

@davegill
Can I do it on your Scala Branch Test PR?