The flux of energy from the sun is . The average flux over the earth is about 1/4 of this. More closely: where = albedo. . Absorption locations:

• 51% absorbed on surface (1/2 put into evaporating water).
• 19% absorbed in atmosphere
• 30%scattered

temperature: s = so T = . Greenhouse effect boosts this somewhat.

source psfile jl@crush.caltech.edu index weather