Solar Energy Absorbed by Earth
						§  Solar Constant (S)    = solar flux density reaching the Earth    = 1370 W/m2 §  Solar energy incident on the Earth    = S x the “flat” area of the Earth    = S  x p R2Earth §  Solar energy absorbed by the Earth    = (received solar flux) – (reflected solar flux)    = S p R2Earth  – S p R2Earth  x  A    = S p R2Earth   x  (1-A)   A is the planetary albedo of the Earth, which is about 0.3.