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

[Archie Zhang]

Hi matt,

Thank you for your response,
I am new to MITgcm, could you explain more about how to extrapolate to the
wet grid-pts? how can I get the position of the wet grid-pts?

In my simulation, I only did the extrapolation in horizontal, since I only
want to increase the horizontal resolution.

Thank you !

On Mon, Jun 9, 2025 at 12:59 PM Matthew Mazloff <mmazloff at ucsd.edu> wrote:

> 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
>
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