The Global Energy System

The Global Energy System - TheGlobalEnergySystem

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The Global Energy System  This chapter focuses on the sun's energy which is responsible for driving the earth's  physical and biological systems. Solar energy  is the driving force for most natural phenomena at the earth's  surface.  The sun is a star of average size with a surface temperature of 6000° C  generated by  nuclear fusion The sun emits 9% of its energy in the  ultraviolet  wavelengths, 41% in the  visible  wave lengths and 50% in the  shortwave   infrared  wavelengths.  The  solar constant  is the amount of energy received per square meter just  outside the earth's atmosphere. The value is 1400 watts per square meter (1400  W/m²).  The earth is much cooler than the sun. It therefore emits  less energy  and emits  that energy in  longer wavelengths Insolation  or incoming solar radiation varies with the angle of the sun above the 
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The Global Energy System - TheGlobalEnergySystem

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