[Wrf-users] Land surface model (NOAH) in idealized 2hill

[Agnes Mika]

Hallo Ehsan,

Ehsan wrote:
> >> I want to use NOAH scheme in idealized 2hill case. One of my fiend did it
> >> for WRF v2.2. I modified my friend's code for WRF v3.3. While there is no
> >> error in compilation and running ideal.exe, but after running wrf.exe this
> >> error appears and program stops running:
> >
> >> forrtl: severe (174): SIGSEGV, segmentation fault occurred
>
>  Flerchinger USEd in NEW version. Iterations=          10
>  d01 2007-03-21_06:00:00           89 points exceeded cfl=2 in domain d01

The error message says that 1.) there is a violation of the CFL
criterium (the model becomes unstable) and 2.) the solution for the
Flerchinger equation in the NOAH scheme does not converge within 10
iteration steps. This usually happens when soil temperatures are below
0 deg C.

Reducing your timestep should help with both problems.

Good luck,
Agnes

--
Dr. Ágnes Mika
Advisor, Meteorology and Air Quality

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