Originally posted by melatonin
Why not? If something like orbital variations provided less solar radiation then it would pretty easy, no?
You seem to falling into binary thinking again here.
Why is it that the temperatures fall in advance of CO2 declines in almost all cases? Given that this happens pretty much all the time indicates a disconnect from the idea that CO2 is causing the warming. Something caused the warming but it was unlikely to be the CO2. CO2 is a greenhouse gas but compared to the other players it is irrelevant. Water vapor is a significant gas. Methane is far more potent than CO2. Overall CO2 exists in such small quantities in the atmosphere. The graph I posted tells the story. I think we can try and dream up stories how CO2 declines lag behind temperature declines but I think its pretty obvious CO2 is not the cause of warming or cooling. The CO2 level changes are in direct response to temperature changes as the environment stores, releases and processes the gas.



