See Using Multiple Meteorological Data Sources from the WPS chapter of the WRF Users' Guide.
If you plan to use one data source for initial conditions, and another for boundary conditions, follow this method:
For example, if you want to use GFDL data for initial conditions, and GFS data for boundary conditions, you first run GFS data for the entire time period, all the way through real.exe (later you will use the wrfbdy_d01 file and discard the wrfinput_d01 file). You then run GFDL data for only the initial time. Since the GFDL data does not have complete soil data, you can supplement it with GFS surface data only (this is only needed if you would like to use the LSM option in the model later). To get only GFS surface data, you should create a Vtable that contains only those surface variables. You can ingest GFDL and GFS surface data in metgrid to obtain a full dataset for the real.exe program. Once you run real (for only the first time period), you obtain wrfinput_d01 with GFDL data. You can then run the model.
Using both GRIB1 and GRIB2 ECMWF Input
Take a look at this forum page for instructions and necessary Vtables to do this:
earthscience.stackexchange.com
Thank you to Peter Kalverla, from Wageningen University and Research, for providing this information.
If you plan to use one data source for initial conditions, and another for boundary conditions, follow this method:
For example, if you want to use GFDL data for initial conditions, and GFS data for boundary conditions, you first run GFS data for the entire time period, all the way through real.exe (later you will use the wrfbdy_d01 file and discard the wrfinput_d01 file). You then run GFDL data for only the initial time. Since the GFDL data does not have complete soil data, you can supplement it with GFS surface data only (this is only needed if you would like to use the LSM option in the model later). To get only GFS surface data, you should create a Vtable that contains only those surface variables. You can ingest GFDL and GFS surface data in metgrid to obtain a full dataset for the real.exe program. Once you run real (for only the first time period), you obtain wrfinput_d01 with GFDL data. You can then run the model.
Using both GRIB1 and GRIB2 ECMWF Input
Take a look at this forum page for instructions and necessary Vtables to do this:
Running WRF with ECMWF GRIB2 model levels
ECMWF model data comes in a hybrid GRIB format, that is, model level output is stored in GRIB2 messages, whereas surface data still uses GRIB1 format. Ungrib is unable to understand this hybrid GRIB
earthscience.stackexchange.com
Thank you to Peter Kalverla, from Wageningen University and Research, for providing this information.
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