[MITgcm-support] tauSaltClimRelax for global ocean simulation at 1 deg resolution

[Martin Losch]

Krishnakumar,

the restoring time scale tau is a tunable parameter. Some people refert to dz(1)/tau as a piston velocity, and you may want to choose tau based on assumptions about a piston velocity. I recommend reading papers such as Griffies et al 2009, Ocean Modelling (the 1. CORE paper) to get a feeling about how to choose these parameters.

Marrtin

On Jun 21, 2012, at 5:42 AM, Krishnakumar Rajagopalan wrote:

> Hi All,
>  
> We are carrying out global ocean simulations on a 1degree model with relaxation type boundary on salt and temperature similar to the 4 deg tutorial (/tutorial_global_oce_latlon). As the first layer thickness in the 1degree grid is 10m (1/5th of that of the 4 deg model), we chose the tau salt to be 1month (tau salt for 4 degree is 6 months).  Is this value reasonable and is there any recommended tau salt value for a 1 degree grid (with 10m first layer thickness)? 
>  
> Thanks a lot
>  
> Best regards
>  
> Krishnakumar
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