[MITgcm-support] basic question about MITgcm forcings

[Gus Correa]

The baseline forcing scheme (controlled  by the "data" namelist) requires
the forcing data to be in the MITgcm grid  of your experiment.
However, if you use the "exf" (external forcing) package, it will
interpolate the forcing data to the MITgcm grid.
It also uses the "cal" (calendar) package to set the forcing frequency,
starting date, etc.
You still need to convert the CESM2 netcdf files to the binary format used
by the MITgcm binary IO package (mdsio),
and this can take a lot of work.
There is a netCDF IO package (mnc), but it is rather incomplete and not
very flexible, especially for the output.


On Fri, Oct 7, 2022 at 3:59 PM Mira Berdahl <mberdahl at uw.edu> wrote:

> Hi,
> I've never run MITgcm before, but I'm curious if it is possible to set up
> a simulation that was forced with CESM2 output (2deg ocean/1deg atmos OR
> 1deg ocean/1deg atmos). More specifically, does MITgcm automatically
> downscale or is there a pre-processing stage that can easily be achieved?
> Also, at what frequency does the forcing need to be (eg. 3hrly, 6hrly,
> daily)?
> Many thanks,
> Mira
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