Chapter 6: WRF-VAR

The file gen_be_etkf.exe is used to update the ensemble perturbations, while gen_be_addmean.exe is used to combine the ensemble mean and the ensemble perturbations. As with 3D-Var/4D-Var, da_wrfvar.exe is the main WRFDA program. However, in this case, da_wrfvar.exe will create filtered observations and prepare formatted omb files for ETKF. ................
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