The Forgotten Milankovitch Effect – Tides

 

By Clive Best

“The obliquity of the earth’s spin axis varies over a 41000y cycle between 14.5 and 22.2 degrees. The canonical work on calculating Milankovitch cycles has been done by J. Laskar and his team at the Observatoire de Paris[1]. Changes in obliquity have been the main driver for glacial cycles for over 2 million years. Larger obliquity increases summer insolation to both poles. Eccentricity and precession just modulate the seasonal balance at each pole. For the last 800,000 years obliquity alone has been insufficient to end glaciations, and the reason for this is still not fully understood.”

The Forgotten Milankovitch Effect – Tides

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