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| Titel |
A simple rule to determine which insolation cycles lead to interglacials |
| VerfasserIn |
Chronis Tzedakis, Michel Crucifix, Takahito Mitsui, Eric Wolff |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250144544
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| Publikation (Nr.) |
 EGU/EGU2017-8382.pdf |
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| Zusammenfassung |
| The pacing of glacial-interglacial cycles of the Quaternary (last 2.6 million years) is attributed to astronomically-driven changes in high-latitude insolation. An enduring puzzle, however, has been how astronomical forcing translates into the observed sequence of interglacials. Here we show that before ~1 million years ago, interglacials occurred when caloric summer insolation exceeded a simple threshold, about every 41,000 years. After 1 million years ago, insolation peaks were skipped more frequently and glacials became longer. We also find that the propensity for deglaciation increases with time elapsed since the previous interglacial onset. A statistical model combining these observations correctly predicts every complete deglaciation of the last million years and also indicates what alternative histories might have arisen. |
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