Graph of the Sun's Total Solar Irradiance (IMAGE)

NASA/Goddard Space Flight Center

Graph of the Sun's Total Solar Irradiance

Caption

A graph of the sun's total solar irradiance shows that in recent years irradiance dipped to the lowest levels recorded during the satellite era. The resulting reduction in the amount of solar energy available to affect Earth's climate was about .25 watts per square meter, less than half of Earth's total energy imbalance.

Credit

NASA/James Hansen

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