[MITgcm-support] TEOS-10

[David Ferreira]

Could be worth talking to Fabien Roquet. I think he has done some of 
this work for NEMO. It won;t help with the choices of implementation in 
the MITgcm, but the physics must have been sorted out.
Not sure if Fabien is on this list.


On 3/18/15 10:26 AM, Martin Losch wrote:
> Hi Ryan,
>
> TEOS-10 is not complete unfortunately, the computation of density and expansion/contraction coefficients works, but with this eos you need to re-interpret “theta” as “conservative temperature” (in degC) and “salt” as “absolute salinity” (in g/kg). The works fine, if you don’t have any bulk formulae that require surface (“in-situ” or, because at the surface, “potential”) temperature. This needs to be calculated from conservative temperature. I checked in parts of the gsw_toolbox, that does that (file gsw_teos10.F) but that is not used anywhere so far. You’d have to start implementing the computation of surface temperature from conservative temperature yourself.
>
> Jean-Michel and I haven’t decided yet, what we think is the correct way of doing this, also because the documentation of TEOS-10 is a little foggy about details (after providing a myriad of constants with double precision: 16 digits). So far it appears to us, that if we add a bucket of freshwater at 10degC to seawater at in-situ 10degC and 0g/kg, we don’t get what we expect (i.e., sea water at 10degC).
>
> Bottom line: you are very welcome to contribute to this (o:
>
> Martin
>
>> On 17 Mar 2015, at 20:41, Ryan Abernathey <ryan.abernathey at gmail.com> wrote:
>>
>> Hi,
>>
>> What is the status of TEOS-10 in MITgcm? I see that it is an option for the equation of state. Does it work properly? My simulation needs exf...do I need to modify my configuration in any way coming from JMD95?
>>
>> Thanks,
>> Ryan
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