[RegCNET] Restart Run - 'NaN'

Moetasim mashfaq at purdue.edu
Mon Feb 27 23:14:16 CET 2006


Well there is not much diffference between dt=100 and dt=120 so I guess it will 
not make a large difference regarding your simulation time with dt=100 (if its 
not a very long simulation). So, yes you can go with dt=100 for the rest of 
simulation. I was just suggesting that once problem days are passed, you stop 
simulation and rerun it at your normal time step, and the only idea behind that 
was to save simulation time...

Moet

Quoting Srivatsan Raghavan <s.raghavan at ucl.ac.uk>:

> Hi Moet,
> 
> Many Thanks for the time step suggestion. It worked fine now.
> 
> So, can I run entire DJF and its restarts with this time step I changed ?
> [dt
> =100, abatm = 300] , as I am sure if a lesser time step for the rest of the
> months is fine or not ??
> 
> Thanks again,
> 
> Sri
> 
> 
> 
> Quoting Moetasim <mashfaq at purdue.edu>:
> 
> > In theory, there should not be any difference between two runs, a 
> > continuous run
> > and run restarted using RegCN SAV file. So, your restart run should not
> give
> > problems for that month if run without restart goes fine in those dates.
> > Anyway, the science of machine arcitecture is sometimes beyond 
> > logic..This might
> > be beacause of 0.001% difference between the two runs, but again, even
> this
> > difference is not logical..
> > My suggestion is that you should run the problem dates with smaller 
> > time step..
> > and it will solve your problem. Try dt=100 and if even this doesn't work,
> try
> > dt=80.. once you are through these dates, restart RegCM with normal 
> > time step.
> >
> > Moet
> >
> 
> 
> 
> 
> 




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