Second, we have the tilt, or obliquity, of the Earth’s axis. Donate Milutin Milankovitch: Seeking the Cause of the Ice Ages main content. Milutin Milanković was born in the village of Dalj, a settlement on the banks of the Danube in what was then part of Austro-Hungarian Empire. Milankovitch cycles are identifiable in the geological record by examining sedimentological and isotopic records.
In its most basic form, Milankovitch theory postulates that variations in the shape of the Earth’s orbit and tilt changes the seasonal and geographic distribution of approaching solar radiation entering the planets upper atmosphere.
This enhanced albedo, reflecting radiation into space leading to further cooling creating a positive feedback loop. Today, there is only about a three percent difference between the farthest point (aphelion) and the closest point (eperihelion) between the Earth and the Sun.
The isotope most commonly used to identify potential cyclicity is oxygen-18 from fossil calcite, ocean sediments and ice cores, which is used to track temperature changes.
In 1911 a young Serbian mathematician, Milutin Milankovitch, decided to chart the ice ages of the Pleistocene.
The episodic nature of the Earth's glacial and interglacial periods within the present Ice Age (the last couple of million years) have been caused primarily by cyclical changes in the Earth's circumnavigation of the Sun.
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