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What about clouds?
November 19, 2008 by Anonymous, 1 year 6 days ago
Comment id: 32933
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"The answer can be found by estimating the magnitude of water vapor feedback. Increasing water vapor leads to warmer temperatures, which causes more water vapor to be absorbed into the air. Warming and water absorption increase in a spiraling cycle."
This seems to imply only a positive feedback system between CO2 and water. Dr Roy Spencer has published a recent study which shows, from satellite readings, that computer models ignore potential increased negative feedbacks from this increased water vapor. What are the increased negative feebacks ... increased cloud concentration which forms from the water vapor. Clouds, at certain heights, act as natural reflectors of heat and act to cool the planet.
Further, using the anthropic principal, it seems almost absurd to reason there are only positive feedbacks and that the earth's climate is inherently unstable. For, in the past, we have had periods of increasing CO2 and also levels of CO2 up to 10x higher than today. If only positive feedbacks existed and CO2 was the main driver of climate why wasn't there some runaway scenario in the past?