[MITgcm-support] EOS comparisons

[Matthew Mazloff]

Hi David,

Remember that only density gradients will effect the dynamics.  The  
model will find different hydrostatic pressures with these different  
schemes, but I think the solution should otherwise be the same  
(except for small differences associated with the different EOS).   
Try comparing the density gradients using these two schemes?

-Matt


On Mar 12, 2008, at 3:41 PM, David Hebert wrote:

> Hello everyone,
>
> I am looking to compare the linear equation of state with the MDJWF  
> equation of state. I have used the same temperature and salinity  
> fields, and obtain RHOAnoma from diagnostics. I have attached the  
> following plot which shows a large difference in RHOAnoma. Note  
> that the green dash-dot line is using the linear EOS with tRef and  
> sRef = 0, since MDJWF does not use the reference values. Also, I  
> used the default tAlpha and sBeta values
>
> This result seems to suggest that when using the Linear EOS, the T  
> field should actually be T-tRef (and S-sRef), whereas for MDJWF it  
> is simply Theta? Or perhaps more simply set tRef and sRef to zero?  
> I am very interested in density and density stratification, so any  
> comments on this from more experienced users would be great.
>
> Thanks,
>
> David
> <RhoCompare_small.jpg>
> <RhoCompare_small.jpg>
> _______________________________________________
> MITgcm-support mailing list
> MITgcm-support at mitgcm.org
> http://mitgcm.org/mailman/listinfo/mitgcm-support