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Politics : Politics of Energy
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To: Brumar89 who wrote (4996)2/15/2009 10:59:03 AM
From: Sam1 Recommendation  Read Replies (2) of 86356
 
How is it possible that warming won't put more water vapor in the air, leading to more rain and snow?

It will put more water vapor in the atmosphere. But warmer air also holds more water vapor. That is one reason why people predict that there will be more precipitation, but it will be in the form of heavier storms. But the soil will be dryer, and the frequency of the storms will be less, which means that the soil will likely hold less of the precipitation that falls. And there could be more erosion.

It also should create more cloud cover, which will have conflicting effects which aren't yet well understood. On the one hand, cloud cover block some of the sun's energy from getting to earth by reflecting it, thus acting as a cooling effect. On the other hand, it will block the earth's heat from leaving, which would have a heating effect. The effect of cloud cover is one of the great uncertainties in all this.
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