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Pre-Cenozoic cyclostratigraphy and palaeoclimate responses to astronomical forcing
De Vleeschouwer, D.; Percival, L.M.E.; Wichern, N.M.A.; Batenburg, S.J. (2024). Pre-Cenozoic cyclostratigraphy and palaeoclimate responses to astronomical forcing. Nat. Rev. Earth Environ. 5(1): 59-74. https://dx.doi.org/10.1038/s43017-023-00505-x
In: Nature Reviews Earth & Environment. Springer Nature: London. e-ISSN 2662-138X
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| Auteurs | | Top |
- De Vleeschouwer, D.
- Percival, L.M.E.
- Wichern, N.M.A.
- Batenburg, S.J.
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| Abstract |
Astronomical insolation forcing is well established as the underlying metronome of Quaternary ice ages and Cenozoic climate changes. Yet its effects on earlier eras (Mesozoic, Palaeozoic and pre-Cambrian) are less understood. In this Review, we explore how cyclostratigraphy can help to distinguish climate modes over the pre-Cenozoic era and aid our understanding of climate responses to astronomical forcing over geological time. The growing uncertainties with geologic age mean that pre-Cenozoic astronomical solutions cannot be used as tuning targets. However, they can be used as metronomes to identify the pacing of distinct climate states. Throughout the pre-Cenozoic, global average temperature differences between climate states were even more extreme (5–32 °C) than in the Cenozoic (14–27 °C), and these, combined with an evolving biosphere and changing plate tectonics, led to distinct Earth-system responses to astronomical forcing. The late Palaeozoic icehouse, for example, is characterized by a pronounced response to eccentricity, caused by nonlinear cryosphere and carbon-cycle behaviour. By contrast, the Devonian warmhouse and the Late Cretaceous hothouse featured recurrent episodes of marine anoxia that may have been paced by astronomical forcing. Formally defining 405,000-year eccentricity cycles as chronostratigraphic units (astrochronozones) throughout the Phanerozoic eon will enable a more comprehensive understanding of how astronomical forcing has shaped Earth’s climate over geologic time. |
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