Glacial cycles and astronomical forcing

Muller, R.A. & MacDonald, G.J. (1997). Glacial cycles and astronomical forcing. Science 277 (5323) 215-218. 10.1126/science.277.5323.215.

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Narrow spectral features in ocean sediment records offer strong evidence that the cycles of glaciation were driven by astronomical forces. Two million years ago, the cycles match the 41,000-year period of Earth's obliquity. This supports the Croll/Milankovitch theory, which attributes the cycles to variations in insolation. But for the past million years, the spectrum is dominated by a single 100,000-year feature and is a poor match to the predictions of insolation models. The spectrum can be accounted for by a theory that derives the cycles of glaciation from variations in the inclination of Earth's orbital plane.

Item Type: Article
Research Programs: Directorate (DIR)
Bibliographic Reference: Science; 277(5323):215-218 (11 July 1997)
Depositing User: IIASA Import
Date Deposited: 15 Jan 2016 02:08
Last Modified: 27 Aug 2021 17:36

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