Transcript for scene 36 of the video " Ice Age 2050s: Certainty 1" by Rolf Witzsche  

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The modern version of the orbital cycles theory

The modern version of the orbital cycles theory is the Milankovitch cycles theory. It combines three minuscule cyclical variations, spanning tens of thousands of years each, into a composite climate effect. The theory breaks down, however when one considers that every single one of the considered cyclical variations has no net effect on the total sunlight received on Earth, even by changes in the orbital eccentricity, as Johannes Kepler had discovered already in the 1600s. 

The orbital cycles only alter the seasonal and hemispheric distribution of the solar radiation received, which are too minuscule to cause the gigantic Ice Age phenomena. 

 

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Published by Cygni Communications Ltd. North Vancouver, BC, Canada - (C) in public domain - producer Rolf A. F. Witzsche