[RegCNET] Change elevation of pressure levels in RegCM?

[bixq]

Hi, Maurice:

On Fri, 21 Jan 2011, Maurice.McHugh at noaa.gov wrote:

>
> Is there a way to alter the distribution of pressure levels within RegCM?

You mean add model layers, YES, it's doable. In PreProc/Terrain/terrain.f,
SUBROUTINE OUTPUT2, you can add the number of vertical layers in if-block

       if(kz.eq.14) then

       ......

       else if .....

       endif

or even change the position of layers position.

> We are not very concerned with lower elevations and would like to have 
> finer resolution at higher elevations, specifically near the tropopause. 
>
If we can’t alter the distribution of pressure levels, could we increase 
the number of levels beyond 23 so that the resolution is finer?
>
> We are also trying to feed eta level input data into RegCM.  It seems complicated to convert the data from eta levels to pressure levels, feed it into the model, and have the model convert it to sigma levels.  Is there a simpler method?
>

Yes, at ICBC step, RegCM prefer pressure level fields. I suppose the 
postcessing code of Eta model should provide this function.

By the way, please raise question just to regcnet at lists.ictp.it and not 
include my email, because it would add pressure to me :)

Regards,
Xunqiang Bi

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   Dr. Xunqiang Bi         email:bixq at ictp.it
   Earth System Physics Group
   The Abdus Salam ICTP
   Strada Costiera, 11
   P.O. BOX 586, 34100 Trieste, ITALY
   Tel: +39-040-2240302  Fax: +39-040-2240449
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