¥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
¥
¥When GHGÕs are added to
the atmosphere, the altitude of IR emission to
space rises
¥
¥In the troposphere, air temperature decreases with altitude
¥
¥So the temperature of the emission to
space decreases
¥
¥So the energy emission to space decreases
because the emission
energy decreases with decreasing
temperature