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Early Pleistocene Glacial Cycles and the Integrated Summer Insolation Forcing

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Huybers, Peter·2006·Science

Abstract

Long-term variations in Northern Hemisphere summer insolation are generally thought to control glaciation. But the intensity of summer insolation is primarily controlled by 20,000-year cycles in the precession of the equinoxes, whereas early Pleistocene glacial cycles occur at 40,000-year intervals, matching the period of changes in Earth's obliquity. The resolution of this 40,000-year problem is that glaciers are sensitive to insolation integrated over the duration of the summer. The integrated summer insolation is primarily controlled by obliquity and not precession because, by Kepler's second law, the duration of the summer is inversely proportional to Earth's distance from the Sun.

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Metadata

Authors
Huybers, P.
Venue
Science
Published
2006-07-28
Volume
313
Issue
5786
Pages
508-511
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2163832574
Cited by
540
References
0
FWCI
12.64
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Early Pleistocene Glacial Cycles and the Integrated Summer Insolation Forcing. https://app.cochat.ai/papers/10.1126/science.1125249
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Huybers, P. (2006). Early Pleistocene Glacial Cycles and the Integrated Summer Insolation Forcing. Science. https://doi.org/10.1126/science.1125249

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