[Wrf-users] Fine resolution run dies on radiation

[Mikhail Titov]

Dear all,
 
I have a curious problem - I try to run a fine grid (with spatial resolution
1.0x1.0 km) using initial-nudging data from grid 3 (nestdown) of the
finished 3-grid run (27-9-3 km spatial configuration).
 
But for the particular place of New Zealand (and only for it and I don't
know why!) in the middle of the South Island WRF (fine grid 1 separate run)
stops reaching radiation calculation block and gives "fragmentation error".
Initially I used 'radt=27' (as the spatial resolution of a mother grid for
3-grid run was 27 km).
 
I tried to play with radiation parameters and radt value and made WRF
working for radt=1 and time_step=0.5 of a second. 
But this configuration is useless as WRF runs 1 hour about 45 minutes and I
need to run a year!
 
I didn't collide in such a problem before.
Could it be a problem with IBM P575 (I work at) level of optimisation or
some another P575 (AIX) stipulation of the maximum number of the iterations?
 
I had a problem several years ago that reminds me this one. I was trying to
run MM5 on Unix workstation (Solaris) and MM5 stoped at the beginning after
several time steps: only a command "-fast -nodepend" helped me to run MM5
normally.  
 
 
Any suggestions are highly appreciable.
 
Many thanks,

--------------------------

Dr. Mikhail Titov

Connell Wagner Ltd.

VP of the NZ Met.Society

University of Canterbury

Christchurch, New Zealand

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