[MITgcm-support] cube sphere 510 initial conditions

[Menemenlis, Dimitris (3248)]

Zhaomin, the initial conditions and the forcing for cube78 were adjusted using a Green's function approach:
http://ecco2.org/manuscripts/2005/green.pdf

The initial conditions are a blend of the Polar Hydrographic Climatology (PHC):
http://psc.apl.washington.edu/Climatology.html

of the WOCE Global Hydrographic Climatology (WGHC):
http://odv.awi.de/en/data/ocean/woce_global_hydrographic_climatology/

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:
http://www.ecmwf.int/products/data/archive/descriptions/e4/

but with rain adjusted based on GPCP pentad analysis:
http://precip.gsfc.nasa.gov/

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

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