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[GEMPAK #SGQ-894781]: Conversion from p- to theta- coordinates

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  • Subject: [GEMPAK #SGQ-894781]: Conversion from p- to theta- coordinates
  • Date: Mon, 14 Jan 2008 15:40:06 -0700
Hello Bob-

> I will be getting model output variables from the WRF model in p-
> coordinates. I want to convert these variables to a theta vertical
> coordinate so that I can calculate the various terms in the diabatic
> potential vorticity equation (Ertel equation) which is inherently
> expressed in a theta coordinate system.
> 
> Our lab uses the GRads graphics system rather than GEMPAK. I seem to
> remember that GEMPAK has a conversion routine, but I'm not sure how to
> proceed without GEMPAK.

Generally,  GEMPAK will do the conversion to isentropic coordinates
on the fly using the library.  You can also convert an entire
grid file to theta coordinates using the GDVINT  program.  However,
in the end you'll have to run GEMPAK to run the programs and
display the data.  So, unless you want to run GEMPAK, I'm not
sure what you are looking for.

> I will appreciate any suggestions that you can send my way.

Don Murray


Ticket Details
===================
Ticket ID: SGQ-894781
Department: Support GEMPAK
Priority: Normal
Status: Open