[MITgcm-support] Set a density distribution

[Matthew Mazloff]

Hi Serge,

You cannot just set density -- as you stated, T and S are the state  
variables used by the MITgcm.  If you are running an idealized  
experiment, however, you can just turn off salinity stepping  
(saltStepping = .false., in data PARM01)  and just use T making your  
equation of state linear such that T and rho will be analogous.

-Matt


On Apr 18, 2011, at 2:06 PM, fancer fancer wrote:

> Matt,
>
> I mean dynamics density, but for initial conditions.
> I mean can I set a matrix with 3D density profile of my area,  
> instead of setting T and S at initial time?
> If I understand your answer properly, I can not.
> I looked the equations of model and understood what it is impossible.
> Every time calculates T and S  through the special equations. Then  
> density calculates through EOS and desity goes to equation of motion.
> MITgcm do not have a equation for  evolution of density. But if it  
> has, it can be possible. Right?
>
> Sincerely,
> Serge Semin
>
>
> On Tue, Apr 19, 2011 at 12:34 AM, Matthew Mazloff  
> <mmazloff at ucsd.edu> wrote:
> Hi Serge,
>
> Do you mean reference density or dynamics density.
>
> Dynamic density is not  a model input, but instead calculated from T  
> and S using one of the equation of state (EOS) options.  Some of the  
> EOS have matlab equivalents in
> http://mitgcm.org/viewvc/MITgcm/MITgcm/utils/matlab/
>
> Reference density is taken as a constant, and should not be  
> spatially varying....
>
> -Matt
>
>
>
> On Apr 18, 2011, at 12:18 PM, fancer fancer wrote:
>
>> Hi, MITgcm support.
>>
>> How can I set a density distribution for my computational area?
>> I know about rhoRefFile input parameter, but this is a 1D vector,  
>> where each element for one vertical layer.
>> I have a 3D matrix with density profile for my area.
>> Is there are some special input parameters or method for  
>> integrating it into computational area?
>>
>> In advance thanks for help.
>>
>> Sincerely,
>> Serge Semin
>> <ATT00001.txt>
>
>
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>
> <ATT00001.txt>

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