¥Notice that because of EarthÕs greenhouse gases, 91% (=64/70) [195/235 = 83%] of the IR emitted to space comes from the atmosphere and only 9% (=6/70) [40/235 = 17%] comes from the surface
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¥When GHGÕs are added to the atmosphere, the altitude of IR emission to space rises
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¥In the troposphere, air temperature
decreases with altitude
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¥So the temperature of the emission to space
decreases
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¥So the energy emission to space decreases because the emission energy decreases with
decreasing temperature