[MITgcm-support] [EXTERNAL] Issue with surface ocean currents

[kunal madkaiker]

Thank you Dimitris,

I would be adding relaxation for U,V at the lateral boundary.
I'll certainly update once I get the results.

Thanks
Kunal

On Thu, Mar 17, 2022 at 11:17 PM Menemenlis, Dimitris (US 329B) <
dimitris.menemenlis at jpl.nasa.gov> wrote:

> Hi Kunal, I will be interested to know what you find, that is, whether it
> is indeed reflections at the lateral boundaries that cause trouble.
> With prescribed boundary conditions, everything that does not match
> exactly the specified boundary conditions will be reflected.
> You can sometimes get away with prescribed boundary conditions when you
> are downscaling from a simulation with the same forcing.
> But this is not your case where the lateral boundary conditions and the
> atmospheric forcing are not directly related.
> Some relaxation at the boundaries might be able to damp these reflections.
>
> Dimitris
>
>
> On Mar 17, 2022, at 8:07 AM, kunal madkaiker <kunal.madkaiker02 at gmail.com>
> wrote:
>
> Thank you Dimitris for your reply.
>
> Yes, I am prescribing the BCs on 3 sides, and not using a sponge yet.
> I'll take a look at your suggestion.
>
> Thanks,
> Kunal
>
> On Wed, Mar 16, 2022 at 6:27 AM Menemenlis, Dimitris (US 329B) <
> dimitris.menemenlis at jpl.nasa.gov> wrote:
>
>> Hi Kunal, are you “prescribing” the boundary conditions or do you use a
>> sponge?
>> If the former, I wonder whether the accumulation of turbulence inside the
>> domain could be caused
>> the reflection of circulation features generated or evolved inside the
>> domain that then
>> reach the lateral boundaries and are inconsistent with the prescribed
>> obcs?
>>
>> Dimitris
>>
>
>
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