Pleistocene Glacial Variability as a Chaotic Response to Obliquity Forcing

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Pleistocene Glacial Variability as a Chaotic Response to Obliquity Forcing

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Title: Pleistocene Glacial Variability as a Chaotic Response to Obliquity Forcing
Author: Huybers, Peter John
Citation: Huyber, Peter J. 2009. Pleistocene glacial variability as a chaotic response to obliquity forcing. Climate of the Past 5(3): 481-488.
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Abstract: The mid-Pleistocene Transition from 40 ky to ~100 ky glacial cycles is generally characterized as a singular
transition attributable to scouring of continental regolith or a long-term decrease in atmospheric CO2 concentrations. Here an alternative hypothesis is suggested, that Pleistocene glacial variability is chaotic and that transitions from 40 ky to ~100 ky modes of variability occur spontaneously. This alternate
view is consistent with the presence of ~80 ky glacial
cycles during the early Pleistocene and the lack of evidence for a change in climate forcing during the mid-Pleistocene. A simple model illustrates this chaotic scenario. When forced at a 40 ky period the model chaotically transitions between small 40 ky glacial cycles and larger 80 and 120 ky cycles
which, on average, give the ~100 ky variability.
Published Version: www.clim-past.net/5/481/2009/
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:3356136
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