[MITgcm-support] Offline Velocity Fields

[Ryan Abernathey]

Does anyone else have any suggestions about this problem?

Thanks,
Ryan

On Feb 27, 2008, at 8:52 AM, helen hill wrote:

> Hi Ryan
>
> I have code to make interpolated velocity fields non-divergent...
>
> Haven't looked at this stuff for months, but will have a poke  
> around later today and see what I can put together for you.
>
> Helen
>
> On Tue, Feb 26, 2008 at 6:44 PM, Ryan Abernathey <rpa at mit.edu> wrote:
> Hello MITgcm people,
>
> I am running an offline tracer advection using 3D velocity fields  
> (from Matt Mazloff's SOSE model).
>
> I would like to interpolate the velocity fields to a finer grid.  
> Specifically, I would like to go from 1/6th degree to 1/12th degree  
> -- twice the resolution.
>
> I first tried the most obvious thing and simply refined each field  
> without taking the boundaries into account. (I just added extra  
> points in between each grid point and interpolated.) I did the same  
> procedure to refine the bathymetry file. As I suspected, when I ran  
> the advection, divergent fluxes near the boundaries acted as tracer  
> sinks.
>
> Could someone suggest a better way to approach this problem? I know  
> that my fields need to be non-divergent and satisfy a no-normal- 
> flux boundary condition. However, I can't see how to force my  
> fields to satisfy these conditions. Any suggestions would be very  
> appreciated.
>
> Thanks,
> __________________
> Ryan Abernathey
> rpa at mit.edu
> MIT Ph.D. Student
> Program in Oceans Atmospheres & Climate
> http://web.mit.edu/rpa/
>
>
>
>
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