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To
understand how cloud feedback might work, you
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have to
understand some facts about clouds:
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(1) Clouds
absorb radiation in the infrared, and
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therefore
have a greenhouse effect on the climate.�
If
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you
put� a cloud high in the atmosphere,
it will have a
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stronger
greenhouse effect than if you put it low in the
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atmosphere.
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(2) Clouds
reflect sunshine back to space.� So
more
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clouds
means less sunshine for earth.� If
you put a
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cloud high
in the atmosphere, it will reflect about the
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same
amount of sunshine as if you put a cloud low in
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the
atmosphere.
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