1
$\begingroup$

I would like to compare NOAA GFS (Global Forecast System) geopotential height from ASL and GTOPO30.

However, I cannot find vertical offset information in GFS geopotential height. Does anyone know where it is located?
(And, I assume that GTOPO30 is in the geometric height from ASL ... is that correct?)

$\endgroup$
1
$\begingroup$

I have found the answer

Geopotential height of ground or water surface is available as a variable (UCAR variable inventory). It is called 'orography' if you read the file with cfgrib. Somehow it did not appear in variable inventory when read with pygrib ...

Alternatively, I could have used MetPy.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.