Monday, June 10, 2013
Slushball Earth Entropy Budget ala Nick Stokes
This is a large amount of energy partially because the thermalized energy is part of a spherical shape reduced to a simple up/down "average" and partially because of the radiant balance "convention". If all of that entropy were themalized in this perspective, then thermal energy up would be 922/2 or 461 Wm-2 with a counter balancing 461 Wm-2 down, producing a radiant "shell". Then if the energy were adjusted for the spherical shape, 461/4=115.6Wm-2. This represents a small error in Nick's model, in my opinion, as the entropy should balance the "shell", in this case Ground thermalized energy for whatever common shape the shell takes.
The reason is that the entropy can be thermalized and then released again as entropy from a secondary process, internal energy transfer for example, which can be any combination of mechanical, chemical or electromagnetic energy flux progressing over any time frame.
Again, Nick's post is here for reference.