<[email protected]> wrote: > > This figure is too high. The amount intercepted by the Earth is 5 million > quads > per annum above the atmosphere, and then some of this is directly > reflected back > into space by cloud cover. >
Where did you get that info? I looked all around for that. I found that one site that expresses the number in quads, and it seemed to compare to the others that show the value in different units. http://www.ecoworld.com/energy-fuels/how-much-solar-energy-hits-earth.html Is there a more authoritative and detailed site than this? Most of them discuss solar insolation in units such as square meters for various locations. That is needed for solar energy planning. They do not include a planet-wide analysis. You cannot extrapolate from local insolation given the extremes at the poles. - Jed
