¥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