[Mitgcm-support] model comparison

[mitgcm-support at dev.mitgcm.org]

Alistair;

we are now down to a comparison of the two models number by number. And there 
starts the problem: The two models (old and new) behave substantially different 
at the very first time step with serious consequences for the later development. 
In the old code the tracers show a step (e.g. 0.1 in salt) at the first time 
step and then continue smoothly but offset from the new code. I can eliminate 
the step with rigid lid and my old rigid lid looks like the free surface in the 
new code. But we have to confirm this quantitatively. 

Before we spend hours and days on solving this: Can you recall what you changed 
going from old to new in the initialization? Is there something missing in the 
old code that I can easily fix? In case you have a quick idea please let me know 
since we are some what puzzled.

Thanks a lot!!!
Detlef.
-- 
Detlef Stammer

Physical Oceanography Research Division
Scripps Institution of Oceanography
9500 Gilman Dr.; MS: 0230
La Jolla, CA 92093-0230

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email: dstammer at ucsd.edu

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