[ncl-talk] vorticity: absolute or relative?

[Dennis Shea]

"relative"   The Coriolis parameter is not included.

On Wed, Feb 22, 2023 at 12:34 PM Rick Brownrigg via ncl-talk <
ncl-talk at mailman.ucar.edu> wrote:

> This is NOT a definitive answer, rather some insights gleaned by looking
> at the source code.  The code that does the numerical computation behind
> uv2vr_cfd specifically mentions relative vorticity. As far as I can tell,
> the rest of those similarly named functions use NCAR's spherepack library
> under the hood to perform their numerical processing. I don't have the
> expertise to look at those calculations and tell you absolute vs relative.
> Nowhere in the spherepack source code does the word "relative" appear.
>
> So that's also NOT much of an answer -- my apologies. A naive question: is
> it possible to contrive some data and run it through those other routines,
> which would reveal relative vs absolute.
>
> Rick
>
>
> On Wed, Feb 22, 2023 at 11:43 AM Lesley Smith - NOAA Affiliate via
> ncl-talk <ncl-talk at mailman.ucar.edu> wrote:
>
>> Greetings awesome NCL community!
>> Does anyone know if the vorticity functions uv2vrdvF, uv2vrG and
>> similar compute absolute vorticity or relative vorticity?
>> Only the uv2vr_cfd documentation specifies "relative vorticity."
>> The others say "vorticity."
>> Thanks for any input!
>> -Lesley
>>
>> Lesley L. Smith, Ph.D.
>> CIRES & NOAA PSL
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