[MITgcm-support] A query!

[Martin Losch]

Abhisek,

the references hydrography tRef and sRef are used twice:
1. default initialization with horizontally homogeneous fields. This initialization is overwritten by whatever is in (from tutorial_global_ocean_latlon)
 hydrogThetaFile='lev_t.bin',
 hydrogSaltFile= 'lev_s.bin',
so tRef and sRef are not used here.
2. for a linear equation of state (eosType = 'LINEAR' in data) 
rho = rhoNil * ( 1  - tAlpha * ( theta - tRef) + sBeta * ( salt - sRef ) )
Here the tRef/sRef give the background stratification and are important for vertical stability computations. However, in tutorial_global_ocean_latlon, eosType = 'JMD95Z', and thus tRef/sRef are not used in that experiment at all.

Martin


On Jul 27, 2012, at 4:58 PM, Abhisek Chakraborty wrote:

> One small query.
> 
> I found in both the "data" files (one sent by you and another as given in MITgcm/verification/tutorial_global_ocean_latlon/input) that the reference temperatures ("tRef" ) for all the vertical levels are set to "20". 
> 
> Is it realistic? If not, what is the way to specify these values (similarly for "sRef" also) for global ocean simulation?
> 
> Thanking in advance,
> Abhisek