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Milankovitch cycles - Wikipedia

Milankovitch cyclesFrom Wikipedia , the free encyclopediaMilankovitch cycles are the collective effect ofchanges in the Earth's movements upon itsclimate, named after Serbian civil engineer andmathematician Milutin Milankovi . Theeccentricity, axial tilt, and precession of theEarth's orbit vary in several patterns, resultingin 100,000-year ice age cycles of theQuaternary glaciation over the last few millionyears. The Earth's axis completes one full cycleof precession approximately every 26,000 the same time, the elliptical orbit rotates,more slowly, leading to a 21,000-year cyclebetween the seasons and the orbit.

The angle of the Earth's axial tilt (obliquity) varies with respect to the plane of the Earth's orbit. These slow 2.4° obliquity variations are ... documented in the ice cores was driven by Northern Hemisphere insolation as proposed by the Milankovitch hypothesis (Kawamura et al, Nature, 23 August 2007, vol 448, p912-917). This is an

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