Solar radiation spectrum at the top of the atmosphere and at the surface. The American Society for Testing and Materials (ASTM) Terrestrial Reference Spectra data (http://www.astm.org/) are used for this figure.
Annual global mean downward solar radiation distribution at the surface.
Annual regional downward solar radiation at the surface containing the United States.
Total global wind power (black line) (three-dimensional integration), southern hemispheric wind power (red line), and northern hemispheric wind power (green line). The number quintillion is .
Annual global mean wind power at 50 m above the surface.
Annual regional wind power at 50 m above the surface containing the United States.
Error in 5 day forecasting of downward solar energy at the surface.
Error in 5 day forecasting of wind power at 10 m above the surface.
Article metrics loading...
Full text loading...