[MITgcm-support] external forcing

[Dmitri Leonov]

Hi Nicolas,

What coordinates are you using?
I recently had this problem when I tried to force a channel model with a 
wind stress. I had to switch from cartesian to spherical coordinates.
That was the easiest fix. Maybe there were other possible workarounds.
As far as I understand, the 'exf' package interpolates data both in time 
and space. It assumes the data are defined on a spherical grid and 
doesn't always correctly interpolates it onto other kind of grid.

Regards,

Dmitri

Nicolas Wienders wrote:
>
> Gentlemen,
>
> Since we were talking about external forcing... i am forcing (trying 
> to) an oceanic
> domain with ECMWF ERA 40 winds, using wind speed at 10 meters...
>
> Everything *seems* to go pretty smoothly....  this files are read 
> correctly:
>
> (PID.TID 0001.0001) // 
> =======================================================
> (PID.TID 0001.0001) // Begin MONITOR EXF statistics
> (PID.TID 0001.0001) // 
> =======================================================
> .......
> (PID.TID 0001.0001) %MON exf_uwind_max                =   
> 8.0050000000000E-01
> (PID.TID 0001.0001) %MON exf_uwind_min                =  
> -6.9110000000000E-01
> (PID.TID 0001.0001) %MON exf_uwind_mean               =  
> -4.5498591236786E-02
> (PID.TID 0001.0001) %MON exf_uwind_sd                 =   
> 2.7145994322517E-01
> (PID.TID 0001.0001) %MON exf_uwind_del2               =   
> 2.2145358844077E-01
> (PID.TID 0001.0001) %MON exf_vwind_max                =  
> -2.3679000000000E+00
> (PID.TID 0001.0001) %MON exf_vwind_min                =  
> -2.9507000000000E+00
> (PID.TID 0001.0001) %MON exf_vwind_mean               =  
> -2.6318417086058E+00
> (PID.TID 0001.0001) %MON exf_vwind_sd                 =   
> 9.6862200473191E-02
> (PID.TID 0001.0001) %MON exf_vwind_del2               =   
> 9.3616243251826E-02
>
>
> But, but, but, absolutely no momentum is transmitted to the water...? 
> I am sure i
> must have done something silly somewhere but can't find what the 
> problem is...
>
> Thank you.
>
>
>
>
>
>
>
>
>
>
>
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-- 
------------------------------------------------
Dmitri A. Leonov
Research Associate, Postdoctoral
University of Washington, School of Oceanography