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Originally Posted by FredMitchell
The description of radiational cooling in the link is not strictly accurate. It is not radiation into the air or atmosphere. Radiational cooling is radiation (black body radiation) not getting reflected back down. So it escapes the earth's atmosphere as radiation. Cloud cover, or an overhanging tree, prevent or reduce this. The tree will even be radiating toward the ground, which is why you often have frost on a lawn except under trees.
"Clouds in a Glass of Beer: Simple Experiments in Atmospheric Physics" is a nice little book that explains this, as well as other interesting things like why mountains in the distant look more grayish or blue. It is sort of a college text in atmospheric physics for art majors, so it is pretty approachable.
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Really, bud don't encourage these questions.
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