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Graph of insolation



This graph shows the incoming solar radiation over the last 600,000 years for summer at 65 degrees north latitude. Note the complex changes that occur in the curve. The curve was derived using the changing values of the eccentricity of the orbit, tilt of the axis and precession of the equinoxes. The data are from Berger and Loutre (1991).
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http://www.museum.state.il.us/exhibits/ice_ages/insolation_graph.html, Last modified August 30th 2007, 02:59PM.