[MITgcm-devel] MLD criterion

[Matthew Mazloff]

right....i believe the kara et al. scheme is that the change in rho  
required to determine when out of the mixed layer is what the surface  
rho would be if potential temp was .8C colder...but this doesnt work  
in some areas of the Southern Ocean...have to see how new criteria  
behave

nice slam on dimitris in there....wow

-matt




On Oct 10, 2007, at 1:12 PM, chris hill wrote:

> You should use a delta in potential density. It should already be  
> in model. Default delta should be ~0.1, I believe.
> T and S compensate in observed mixed layers so using T is a bad  
> idea - that code must have been contributed from Dimitris or someone!
>
> Chris
> Matthew Mazloff wrote:
>> Hi MITgcm devel,
>> I have been getting some grief about the kara et al. mixed layer  
>> depth criteria....not that its a big deal because MLD can be  
>> calculated offline...but apparently using dt=.8 criteria is not  
>> robust...
>> two questions
>> 1) Is there any desire to update this criteria?
>> 2) is it very difficult (computationally expensive) to use a  
>> criteria using more than just temp (i.e. density)?
>> there are 2 criteria i have been suggested (dong et al., 2007 and  
>> one in preparation by Holte and Talley), let me know if anyone  
>> wants to discuss further
>> -matt
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