re: Positive feedbacks from the carbon cycle
The "positive feedback" phenomenon came up earlier, and I'll ask the same question I asked back then: If this accounts for large amounts of CO2 being released in previous cycles as temperature goes up,
Then why do temperature and CO2 drop back down again, cycle after cycle? The whole definition of positive feedback is the inability to regain equilibrium unless the cause is external.
Noticed a special bonus appearance by Thomas Lee Elifritz in the comments...
