Reply To: Questions regarding DPF.

[Brian H]

Runawaylessness

The postulate of positive feedback in the system (i.e., that water vapor multiplies the effect of CO2, which raises air and ocean temperatures driving even more CO2 and H2O into the atmosphere, and so on) has been disproven soundly in thorough experimentation … by Planet Earth. The geological record shows that every combination of low and high CO2 (slightly lower than present up to 20X current numbers) and high and low temperature (from tropical poles to ice sheets nearly to the equator) has been tried, at great length, and no “runaway” has occurred. The minute range of values we’re now experiencing and playing with thus has no more chance of causing runaway than spitting in the ocean has of causing a tsunami.