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Using WRF and WPS

Many versions of WRF and WPS are installed in /usr/local/pkg on the power7 and BlueGene nodes.

Geodata for WPS is installed in /hpc/scratch/geog and you can access it with geog_data_path = '/hpc/scratch/geog' in your namelist.wps file.

Historical weather data ("FNL files") are stored in /hpc/scratch/FNL

There is a script on hpclogin1 called /usr/local/bin/ that creates a directory and sets it up with symbolic links to the WRF installation, so that you only have to copy in GRIB data and namelist files - of course, you might want to copy over your own LANDUSE tables, etc as well.  Depending on the login node where you run it will assume that you want WRF to run on that architecture (Foster for the BlueGene/P, Beatrice for Power7 Linux).  WPS is always setup to run on the power7, though.

For example, you might run these commands to set up, edit and then run a polarWRF simulation in the directory wrfTest on the BlueGene/P:

# Change the default location of WRF:

export WRF_DIR=/bgp/local/pkg/polarWRF/version

# Set up the directory: wrfTest
cd wrfTst
nedit namelist.wps namelist.input
ln -s some_GRIBFILE_directory/gfs.t12z.* .
llsubmit wps.ll
llsubmit wrf.ll

To restart a WRF simulation

  • Create restart files: In namelist.input, set restart_interval to your desired restart output file interval in minutes.
  • It's a good idea to make the restart interval a nice multiple of 24 hours, or whatever the time period covered by the WRF simulation is.  For example:  4320 minutes (3 days). Otherwise, WRF will restart the simulation from a strange time like 07:20am.
  • You don't need to re-run real.exe.

In namelist.input:

  1. Set restart = .true.
  2. Set start_* time to reflect restart time. You get this from the name of the last restart file created, eg: wrfrst_d01_2008-09-07_22:40:00 means we will restart from 22:40 on 7/9/2008, so the parameters are:

    start_year      =       2008,   2008,   2008,   2008,
    start_month     =       09,     09,     09,     09,
    start_day       =       07,     07,     07,     07,
    start_hour      =       22,     22,     22,     22,
    start_minute    =       40,     40,     40,     40,
    start_second    =       00,     00,     00,     00,
  • Re-run wrf.exe

CategoryApps CategoryHpc