---------- Forwarded message ----------
Date: Mon, 2 Jun 2003 16:13:23 +0530 (IST)
From: P S Swathi <[EMAIL PROTECTED]>
To: Bonnie Samuels <[EMAIL PROTECTED]>
Cc: Matt Harrison <[EMAIL PROTECTED]>, "V.Balaji" <[EMAIL PROTECTED]>
Subject: Re: Sponges

Dear Bonnie

Thanks for your mail and the files..I notice that these files are for 
generating sponge fields and they are quite
old (use Eugene release of FMS). I was able to generate sponge fields
with regrid_3d as Matt suggested a long time ago but the problem is to
bring them into mom4.

I have been looking at the code 

mom4/ocean_aparam/sources/sponge/ocean_sponges.F90 carefully. I notice
that you have done something quite clever like finding out if a
local_domain has any sponge calls at all (the use of col) and setting
sponges_anywhere =.true. if there are points with in a local_domain which
has sponging.

I have a basic problem with this..Wouldnt trying to do sponges only on a
few pe's give rise to "load imbalance"?..what we gain in pe calculations
may be lost at a "sync" when we update_domains.

If I strip this part out and let every point in the full domain do a
sponge, would I be shooting myself somewhere?

I rewrote a lot of the sponge code to use Matt's "init_external_field"
like he does in ocean_flux.F90 to bring in time-dependent sponge values
but I'd like this point cleared before I go further..

Thanks.

Swathi

On Fri, 30 May 2003, Bonnie Samuels wrote:

> Swathi - Things remain busy for all, at work and outside of work.
>  After an overcast May with 21 days of rain, the sun is out.
> I have not looked at the sponge code since I gave it to Matt.
> At one time, I had a script to produce the sponges. I have put them
> on the anonymous ftp under bls.
> Try to get the following script and files:
> run_test_3dsponge
> axis_utils.F90
> lintrp_1d.f90
> sponge_3d.f90
> utils.f90
>   At least in the sponge_3d.f90 you can see how I put the
> coefficients in, worst case maybe you can ncks the information
> to your other file.
> 
>                       Bonnie
> 




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