[RegCNET] cloud albedo

[Solmon Fabien]

Dear Zeinab

> Dear All
>
> I want to ask about some variables in the code of Regcm-4.1.1:
> the variables (alb) and (albc) in program of mod_radiation.F90 in the
> Main, are these the total albedo of atmosphere and surface, or the albedo
> of the atmosphere only for all and clear sky.


these are planetary albedo including surface and atmosphere contribution

> Can I calculate the cloud albedo from the difference between alb and albc?

I guess this way you'll get an vertically integrated view of 'planetary
albedo change due to clouds'. I don't know if you can really call that
'cloud albedo', there might be confusion with local cloud level properties
like cloud single scattering albedo or cloud layer reflectivity.

> Also, the variable of (solin) in output file of RAD, is the incident solar
> radiation at the surface or at the top of atmosphere?

Yes solin is TOA, which make sense with the calculation of alb and albc.

regards
fabien
>
> thanks in advance.
>
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