The WRF V2.2.1 is compatible with WPS and backward compatible with SI real output. One must add two new namelist records (&fdda and &grib2) to your namelist.input file from previous releases (see namelist.input files in test/nmm_real/ directory for an example).

Note: wrfinput_d01 and wrfbdy_d01 from V2.2 and V2.2.1 cannot be used in previous releases of WRF.

WRF Version 2.2.1 new features, updates and bug fixes

WRF-NMM specific updates

• Added capability to use WPS output with NMM

General updates

Phyiscs:

• Microphysics
• Thompson scheme
• Parameter updates
• Cumulus Physics
• GD
• Fix for potential undefined value
• KF
• Minor change to specify upper melting layer.
• Land Surface Physics
• NMM
• Modified to properly use all soil information if RUC fiels are being used to initialize a simulation using the NOAH/NMM LSM.
• Atmospheric Radiation
• GFDL:
• The value of DEGRAD was being misused for conversion from radians to degrees of latitude. This affected only ozone computations.
• The time going into the mean zenith angle computation was sligly off.
• RRTM:
• Fix to use skin temperature instead of extrapolated air temp in RRTM radiation.
• PBL
• MYJ
• Limit 2m/10m diagnostic T and q to prevent unrealistic outputs in MYJ PBL scheme.