<div dir="ltr"><div>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.</div><div><br></div><div>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.</div><div><br></div><div>Rick</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Feb 22, 2023 at 11:43 AM Lesley Smith - NOAA Affiliate via ncl-talk <<a href="mailto:ncl-talk@mailman.ucar.edu">ncl-talk@mailman.ucar.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Greetings awesome NCL community!<br>
Does anyone know if the vorticity functions uv2vrdvF, uv2vrG and<br>
similar compute absolute vorticity or relative vorticity?<br>
Only the uv2vr_cfd documentation specifies "relative vorticity."<br>
The others say "vorticity."<br>
Thanks for any input!<br>
-Lesley<br>
<br>
Lesley L. Smith, Ph.D.<br>
CIRES & NOAA PSL<br>
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