[MITgcm-support] cube sphere 510 initial conditions

Menemenlis, Dimitris (3248) Dimitris.Menemenlis at jpl.nasa.gov
Tue Feb 15 19:07:56 EST 2011

Zhaomin, the initial conditions and the forcing for cube78 were adjusted using a Green's function approach:

The initial conditions are a blend of the Polar Hydrographic Climatology (PHC):

of the WOCE Global Hydrographic Climatology (WGHC):

and of model spin-up.

To a good approximation the initial conditions are:

1.67 * (PHC + 13-yr spin-up) - 0.37 * PHC - 0.13 * (PHC + 3-yr spin-up) - 0.17 * (WGHC + 3-yr spin-up)

To a good approximation, cube78 forcing is ERA40:

but with rain adjusted based on GPCP pentad analysis:

and so as to avoid volume (salinity or SSH) drift in the model.

Let me know if you need more details on any of the above.


Dimitris Menemenlis <menemenlis at jpl.nasa.gov>
Jet Propulsion Laboratory, California Institute of Technology
MS 300-323, 4800 Oak Grove Dr, Pasadena CA 91109-8099, USA
tel: 818-354-1656;  cell: 818-625-6498;  fax: 818-393-6720

On Feb 14, 2011, at 9:24 AM, Wang, Zhaomin wrote:

> Hi there,
> I am running MITgcm of cube sphere 510. In README.cs510, I found that the run is initialized from cube78 Jan 1992 pickup. I would like to know how those pickup files were obtained, for example, how the spin-up was done before producing Jan 1992 pickup files, and what the forcing was for cube78.
> I will appreciate your help.
> Zhaomin 

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