Why Didn't Early Earth Freeze? The Mystery Deepens

[Mike Davis]

No additional warmth was needed! Additional warmth creates additional restrictions that control the temperature. Ice ages were not possible until there were land masses in the required locations that allowed ice to accumulate. This goes back to the Green house theory where the GHGs restrict both gain and loss of warmth / energy. With a cooler sun the earth would have less restriction on the incoming solar energy but enough restriction on the outgoing energy to maintain an above freezing water temperature. While CO2 may have played a part it even then could not compare to water vapor.
Elevation changes due to land masses that block / redirect atmosphere and ocean circulation are underlying factors in weather patterns because without the land the weather would be sort of dull.