[MITgcm-devel] ocean_emissivity consistency

[Menemenlis, Dimitris (3248)]

Makes sense ... and less disruption the way you suggest.

Do you want me to add the SEAICE_waterAlbedo check,
or will you take care of that?

Cheers

Dimitris Menemenlis

On Dec 19, 2011, at 12:25 PM, Jean-Michel Campin wrote:

> Hi Dimitris,
> 
> I think some constants are "constant" enough that having them set
> in model/src make sense. I tried a long time ago to put some
> in COMMON /PARM_ATM/ (PARAMS.h), like celsius2K, but it did not
> propagate as default for other pkg (exf is using cen2kel, set to
> a different value), may be because it was not possible to change
> it in file "data" ?
> In the same way, stefanBoltzmann, Latent heat (fusion, evap), 
> air heat capacity (this one is already there: atm_Cp) could be 
> defined in PARAMS.h
> 
> But regarding albedo, since it can be computed in many different
> ways (fct of temp/age of snow, zenit angle ...), it's less clear to me 
> what benefit we would get from setting some default in model/src.
> The drag coeffs are not so universal neither (are they ?) but
> some surface emissivities might be. My point here is that if
> one constant is used only once to computed a derived quantity 
> (e.g., a flux), it's probably better to keep it in the pkg
> which compute this flux.
> 
> The case of SEAICE_waterAlbedo is little bit different, and
> would be better to have it set to UNSET_RL in case we use
> pkg/exf, and stop if it set (in data.seaice) to something else.
> 
> Cheers,
> Jean-Michel