[RegCNET] geopotential filtering?

[Graziano Giuliani]

On 04/30/2013 09:30 AM, Ivan Guettler wrote:
> Hello everyone,
>
> Is anyone aware of the motivation for so called "Gauss-Seidel
> filtering" in PostProc/mod_derived.f90 in RegCM4.4.
>
> This method is applied when using sigma2p for e.g. geopotential. A
> reference about this method  would be also helpful.
>
> Cheers!
> Ivan
[...]

The reason is to remove the orographic effect from the computed MSLP.

The method has been implemented following:

http://www.hirlam.org/publications/NewsLetters/46/64_hirnews_mslp.pdf

Ciao!

Graziano.

-- 
Graziano Giuliani - Earth System Physics Section
The Abdus Salam International Centre for Theoretical Physics
Strada Costiera, 11 - I - 34151 Trieste Italy