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Trends, rhythms, and aberrations in global climate 65 Ma to present
1Earth Sciences Department, University of California, Santa Cruz, CA 95064, USA. jzachos@es.ucsc.edu
Science (New York, N.Y.)
|April 28, 2001
Summary
Earth's climate has evolved significantly over 65 million years, with new deep-sea core data revealing complex warming, cooling, and rapid shifts. This research clarifies Cenozoic Era climate variability and its driving mechanisms.
Area of Science:
- Paleoclimatology
- Geology
- Climate Science
Background:
- Earth's climate has evolved significantly over the past 65 million years (Ma).
- Deep-sea sediment cores provide crucial data for understanding past climate changes.
- Climate evolution involves gradual trends, periodic cycles, and abrupt shifts.
Purpose of the Study:
- To review recent advancements in defining global climate evolution during the Cenozoic Era.
- To focus on periodic and anomalous climate variability in the early Cenozoic.
- To identify previously unrecognized climate alteration mechanisms.
Main Methods:
- Analysis of deep-sea isotope records.
- Investigation of sediment cores for paleoclimate proxies.
- Examination of tectonic and orbital forcing mechanisms.
Main Results:
- Detailed characterization of Cenozoic climate evolution, including warming and cooling trends.
- Identification of periodic cycles (10^4–10^6 years) and rapid climate transients (10^3–10^5 years).
- Improved understanding of climate variability driven by tectonic and orbital processes.
Conclusions:
- Deep-sea records offer high-resolution insights into Cenozoic climate dynamics.
- The study highlights the complex interplay of factors driving climate change.
- New perspectives on climate alteration mechanisms have emerged from recent research.
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