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| Titel |
Pleistocene glacial variability as a chaotic response to obliquity forcing |
| VerfasserIn |
P. Huybers |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1814-9324
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| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 5, no. 3 ; Nr. 5, no. 3 (2009-09-03), S.481-488 |
| Datensatznummer |
250002547
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| Publikation (Nr.) |
 copernicus.org/cp-5-481-2009.pdf |
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| Zusammenfassung |
| 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. |
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