[RegCNET] Erasing topography....Help Please!

[XUNQIANG BI]

Hi, Highland Boy:

There are several ways of doing this thing.

Method 1:

1. after you finishing the terrrain step, you need write a small
    code to read the binary file DOMAIN.INFO, then you set the ht
    to zero then write back ht fields.

2. do the rest steps (ICBC, Run, ......)



Method 2:

1. edit terrain.f before you run the terrain step, in subroutine
    OUTPUT2, just before you write out htgrid

       write(nunitc,rec=2) ((htgrid(i,j),j=1,jx),i=1,iy)

    you need set the whole htgrid fields to zero.

2. do the rest steps (ICBC, Run, ......)


Personaly, I don't think this kind of experiment makes sense. especially
the forcing fields (from global model output) already contain the 
topography effect, but you can play with RegCM.

Regards,
Xunqiang Bi

On Fri, 16 Jan 2009, Highland Boy wrote:

> Dear all
>
> I am trying to study the effect of topogrphy on rainfall by using RegCM. For
> this I want to run the model with  and without topography. But I have no
> idea as to how I will erase the topogrphy. It is said that we have to reduce
> the elevation to sea level to do it, but I don't know how....Please advise
> and Help.
>
> Thank you all in advance...
>

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   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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