Documentation inconsistency correction

After a discussion with @acapet, we have pointed out some inconsistencies in the documentation regarding the heat budget variables. In order to align the varibales names in the doc and in the code, I suggest the following variables names.

Q_{s} The (downwards) incident solar irradiance flux entering at the top of the atmosphere

Q_{rad} The ratio of Q_{s} at the sea surface after the atmospheric effects (back-scattering, absorption, reflection, refraction, cloud coverage, etc)

Q_{tot} the Net total flux such as Q_{tot} = Q_{rad} - Q_{nonsol} where Q_{nonsol} is the (upwards) non-solar heat flux

Modifications

• in the code (Surface_Fluxes.f90), it is not Reed (1977) but Rosati & Miyakoda (1988)
• in the documentation
  • eq 5.228: Q_{s} becomes Q_{tot}
  • p.159: Q_{qsol} becomes Q_{rad}
  • p.968: Q_{s} becomes Q_{rad}
  • eq 5.308,5.310, 5.311: Q_{s} becomes Q_{rad}
  • eq 5.237: it is not Brunt (1932) but Gill (1982)
  • All the variables Q_{nsol} become Q_{nonsol}