[MITgcm-devel] update on radiation part of bulk code

[Martin Losch]

Patrick, Dimitris,

my experience with CORE (and seaice) and the default values in exf is  
that I have a net heat flux into the ocean of about 8-9W/m^2 in a  
100year average. This is associated with a net fresh water flux into  
the ocean of about 2e-8m/s (significant) which is simply balance at  
each time step (using the hack balanceEmPmR=.true.), so that then my  
salinity fields look "reasonable" for 100y run.
My temperature is terrible (far too warm, 2deg, between 100 and 500m,  
surface is mixed only .04deg on average). I tried to use  
balanceQnet=.true., but then the model blows up after 15yrs (have to  
investigate that now, but I assume that this is not unexpected as I  
correct the flux after seaice_model, so that the temperatures under  
the ice are bound to be wrong (too cold?) and no longer consistent  
with ice growth. I can imaging that this can cause problems).

So the issue (for me) is balancing the heat fluxes (at least  
approximately), which I am trying now by removing the mean heat flux  
of 9W/m^2 to lwdown (that is decreasing the incoming long wave  
radiation). One could also try to change the ocean emissivity, but I  
expect to be a much harder tuning exercise.

Patrick: we need optimized parameters for exf. When are you finally  
going to do it? (o:

Martin


On 22 Dec 2006, at 01:26, Patrick Heimbach wrote:

> Yes, all (pure) NCEP forced (no ECCO adjustments),
> and all three use downwelling-only,
> no net radiative fields.
> -p.
>
> Quoting Dimitris Menemenlis <menemenlis at sbcglobal.net>:
>
>> Patrick, your 3 runs are NCEP-forced?
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