[Wrf-users] Tests with adaptive time step in WRF-ARW (v3)

[Eduardo Penabad Ramos]

Hello!
 
we are running a setup of 3 nested grids with WRF-ARW (v3) over Galicia (NW
Iberian Peninsula), with dx=36,12 and 4 km.
 
We are testing the adaptive time step with this grid configuration, and with
the following set of physics:
 
Radiation: Longwave RRTM, Shortwave MM5-Dudhia
PBL: YSU (with sfclay: Monin-Obukhov from MM5 MRF)
Surface: 5 layer MM5 LSM
Cumulus: Kain-Fritsch
Microphysics: WSM6
 
With this setup we have experienced some problems related with Kain-Fritsch
(we guess). After about 40-50 hours of simulation, error messages appear in
the WRF output textfiles:
WOULD GO OFF TOP: KF_ETA_PARA I,J,DPTHMX,DPMIN
where NaNs appeared for DPTHMAX
We have tested with Betts-Miller-Janjic cumulus parameterization, and
although no error messages appeared, wrfout files also have some NaNs
inside.
 
Do you have any suggestions? Thanks in advance!
 
Eduardo Penabad
MeteoGalicia
 
 
 
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