[MITgcm-support] Interpolation issue: wet grid-pts with theta=0 identically

[Matthew Mazloff]

You need to extrapolate the T and S to all wet points. 
I usually extrapolate in the vertical first, and then the horizontal. 

You don’t want ICs with T=S=0 in your run.

Matt


> On Jun 9, 2025, at 9:49 AM, Juncheng Zhang <juncheng.zhang at mail.utoronto.ca> wrote:
> 
> Dear all, 
>  
> I am using MITgcm to run a 1km high-resolution simulation based on the tutorial reentrant channel,
> I first run a 5 km simulation, then use the output of 5km run as the initial condition of my 1km run,
> However, after I  did the interpolation of 5 km output, and run the model, the error said below:
>  
> (PID.TID 0000.0001) *** ERROR ***  INI_THETA: found      2891 wet grid-pts with theta=0 identically.
> (PID.TID 0000.0001) *** ERROR ***  If this is intentional, you need to set checkIniTemp=.FALSE. in "data", namelist PARM05
>  
> I know wet grid-pts relates to the parameter hFac? But I don’t know how to fix it,
>  
> And I tried to ignore this error by adding checkIniTemp=.FALSE., however, the simulation is not stable, and I had weird numerical artifacts appearing.
>  
> Thank you in advance, I appreciate any help.
>  
>  
> 
> Kind Regards
> 
> Juncheng Zhang
> PhD Student, 
> 
> Earth, Atmospheric, and Planetary Physics
> 
> Department of Physics
> University of Toronto
> McLennan Physical Laboratories
> 60 St Gorge St
> Toronto, Ontario, M5S 1A7
> 
> juncheng.zhang at mail.utoronto.ca <mailto:juncheng.zhang at mail.utoronto.ca>
> 
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