[cam-users] Slab ocean/aquaplanet

[Erik Kluzek]

Hi Peter

	Thanks for your message.

>
> I am working with the CAM2.0.1 on Compaq Alpha's without MPI available.
> I wish to perform experiments with the following setup:
>
> -T21
> -aquaplanet
> -no seasonal cycle
> -slab ocean
> -with and without sea-ice
>
> In connection to this I have some questions and comments:
>
> 1) Having chosen T21 in the configuration, using the "-infile" option to
> the build-namelist-script makes it go into some infinite loop. This is
> of course worked around by entering the name-list variables in the
> command line, but it is still weird since it doesn't happen when using
> T42. Has anybody else encountered this?
>

Can you send the actual file you were using with "-infile" that
choked?

> 2) If I set "-ocn som" in the configuration, I hoped to be able to run
> in slab ocean mode, but it seems that I am missing some code to be able
> to do this. The compilation stops when trying to build "ice_data.o",
> since here a reference is made to the sst_data-module in the directory
> cam2.0.1/models/atm/cam/src/ocnsice/dom which is not included in
> "Filepath" when "-ocn som" is chosen. Has anybody run the CAM as
> stand alone with a slab ocean model, or is it necessary to go through
> the flux coupler (which needs mpi) ?
>

The public releases do not provide the SOM code. SOM code may
be released in the future once the science is worked out.

> 3) When running with (aqua_planet=.true.) in the namelist, there is no
> sea ice in the model and SST's are specified analytically. How do I
> change this?
>

This is how aqua_planet works. If you want to have sea-ice with
varying SST's you'll want to run without aqua_planet and supply
an initial dataset where PHIS, LANDM, LANDFRAC and SGH are zero
everywhere. Then the SST dataset will determine the location
of sea-ice.


Erik Kluzek, (CGD at NCAR)
National Center for Atmospheric Research
Boulder CO, (off) (303)497-1326 (fax) (303)497-1324
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