[MITgcm-support] Solution blows up

[Shevchenko, Igor]

Thank you for your advice.
1. There is no mismatch between the initial conditions and bathymetry, since I superimpose the bathymetry on the interpolated data, and fill possible zero temperature and salinity
in the ocean with default values, which are 20 and 30, respectively.
2. Could you please explain what you mean by the stability of the interpolated temperature field?
If you mean the temperature field computed on the 1/6 grid, then yes, it manifests severe numerical instabilities too.

Best regards,
Igor

________________________________________
From: MITgcm-support <mitgcm-support-bounces at mitgcm.org> on behalf of Michael Schaferkotter <schaferk at bellsouth.net>
Sent: 04 March 2020 13:25
To: mitgcm-support at mitgcm.org
Subject: Re: [MITgcm-support] Solution blows up


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1. Check that there are no mismatches between interpolated initial condition values and the bathymetry of the 1/6 grid.

2. Is the interpolated temperature field stable?




> On Mar 4, 2020, at 03:02, Shevchenko, Igor <i.shevchenko at imperial.ac.uk> wrote:
>
> Dear MITgcm users,
>
> I have two solutions computed at 1/12 and 1/6 degree resolution, respectively. MITgcm works perfectly fine for both.
> Now, I would like to run the 1/6 model starting from an initial condition which is computed as an interpolation of a 1/12 snapshot onto the 1/6 grid.
> However, the initial condition computed in such a way leads to the solution which blows up after several time steps. I tried different time steps but it didn't change the result.
> Any hint of what can potentially go wrong is very welcome.
>
> Best regards,
> Igor
> _______________________________________________
> MITgcm-support mailing list
> MITgcm-support at mitgcm.org
> http://mailman.mitgcm.org/mailman/listinfo/mitgcm-support

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