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Politics : Formerly About Advanced Micro Devices

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To: J_F_Shepard who wrote (600374)	2/10/2011 7:31:41 PM
From: TimF	Read Replies (1) of 1575883

"But the levels of CO2 increases that are predicted would not cause a large degree of warming. To get that you need to consider the other factors, which could create such warming or which could result in colder temperatures in the future." Can you elaborate on this???? CO2 doesn't have a powerful enough greenhouse effect to increase the temperature to a very significant degree unless we added a lot more of it than we are likely to add. But in theory a relatively small increase from CO2, if not countered by other factors, could cause other factors to come in to play that would also increase the temperature creating at least a temporary positive feedback loop. For example slight warming from CO2 could cause a slight melting of polar ice which causing the Earth's albedo to decrease causing warming. It could also increase the amount of water vapor in the air, and the water vapor would also act as a greenhouse gas. There are both positive and negative feedbacks. If you assume they are mostly positive, and in aggregate pretty powerful, your calculations will show much more warming than the CO2 could cause directly.

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