[MITgcm-support] monitoring of my model crash

[Jody Klymak]

Hi Neil,

An obvious thing to check is the CFL criteria.  Also check that your hFac is not too low - maybe you have introduced some very thin cells in the vertical w/ your new bathymetry, in which case dz is very small in some cells, and hence the vertical CFL is easily violated.  

While debugging, I'd go ahead and set monitor_freq=dt.

Cheers,   Jody


On Jun 18, 2014, at  14:09 PM, Neil Patel <nigellius at gmail.com> wrote:

> I changed the monitor_freq to a very low number (output every six time steps) and got a few time steps to print before crashing. By time step 12, a number of the field values had diverged. For example. 
> 
> (PID.TID 0000.0001) %MON dynstat_eta_mean             =  -6.6064553330479E+07
> (PID.TID 0000.0001) %MON dynstat_theta_mean           =  -2.0913841908793E+71
> (PID.TID 0000.0001) %MON dynstat_sss_mean             =  -1.2065577756912E+74
> 
> The fields appear reasonable at the initial values. Anyone have an idea where to check for possible causes?
> 
> Thanks,
> 
> Neil
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--
Jody Klymak    
http://web.uvic.ca/~jklymak/