[MITgcm-support] exf interp

[Matthew Mazloff]

Hi Dimitris,

See the lines at X.5 degrees.  Its not very noticeable in snapshots,  
but really stands out in the mean as the signal is accumulated

-Matt

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On Oct 17, 2009, at 7:42 AM, Dimitris Menemenlis wrote:

> Matt, could you send an example figure of problem?
>
> On Oct 17, 2009, at 7:29 AM, Matthew Mazloff wrote:
>
>> Hi Dimitris,
>>
>> Ah yes, I see this now.  Very nice.  Unfortunately the gridding is
>> still noticeable in my plots of wind speed gradient.  I am able to
>> pick out the exact locals where the forcing is prescribed -- meaning
>> the interpolation is not smooth.  This is not good for plotting wind-
>> stress curl. Have you noticed this on your high-res set-ups?  Do you
>> think this is a problem?  Should we (can we) try a smoother interp
>> method?
>>
>> -Matt
>>
>> On Oct 16, 2009, at 5:03 PM, Dimitris Menemenlis wrote:
>>
>>> Matt, I hardcoded bilinear interpolation for tracer fields because
>>> overshoots can be problematic and bicubic for wind velocity (see
>>> exf_set_uv.F) for stress fields because the second derivative
>>> matters.  I would recommend to leave as is.  Other combinations can
>>> (or did) cause trouble.  Dimitris
>>>
>>> On Oct 16, 2009, at 3:21 PM, Matthew Mazloff wrote:
>>>
>>>> Hello,
>>>>
>>>> It appears the model is equipped to do both bilinear and bicubic
>>>> interpolation for exf_interp.F.  Interp_method, however, is  
>>>> hardcoded
>>>> to bilinear interpolation.  This does matter for my 1/16 degree  
>>>> set-
>>>> up.  Can anyone confirm that the bicubic interpolation is ok --  
>>>> and I
>>>> can go ahead and use this option.
>>>>
>>>> -Thanks,
>>>> Matt
>
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