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DOI10.1016/j.quascirev.2020.106531
Abrupt climate change and its influences on hominin evolution during the early Pleistocene in the Turkana Basin; Kenya
Lupien R.L.; Russell J.M.; Grove M.; Beck C.C.; Feibel C.S.; Cohen A.S.
发表日期2020
ISSN0277-3791
卷号245
英文摘要Rapid climate variability has been hypothesized to play an important role in hominin evolution, yet our knowledge of Plio-Pleistocene climate change on short timescales is poor. Here, we developed centennial-scale reconstructions of precipitation from leaf wax biomarker hydrogen isotope ratios (δDwax) using lacustrine sediment from West Turkana, Kenya. We analyzed two time intervals (∼1.72 and ∼1.60 Ma) with different orbital configurations (0.043 and 0.025 eccentricity, respectively) to examine the influence of seasonal insolation forcing on high-frequency climate variability and the rates of climate transitions. Our data indicate that under low summer insolation, which should induce high latitude glaciation and tropical African aridity, millennial-scale climate variability was stronger. This suggests that hominins may have been forced to contend with increased climate variability during already extreme environmental conditions. Additionally, we observe a rapid shift from arid to humid conditions occurring in less than 200 years under high-amplitude precessional-scale insolation change. The rate of this transition is similar to that observed in some proxy records of the onset of the African Humid Period, indicating high sensitivity to gradual insolation forcing in the Turkana Basin. Such abrupt climate changes could induce evolutionary selection for generalist behavioral traits in hominins. © 2020 Elsevier Ltd
英文关键词Biomarkers; East africa; Human evolution; Organic geochemistry; Paleoclimatology; Pleistocene; Stable isotopes
语种英语
scopus关键词Glacial geology; Incident solar radiation; Abrupt climate change; Climate transition; Climate variability; Environmental conditions; Evolutionary selection; Insolation forcing; Lacustrine sediments; Orbital configuration; Climate change; biomarker; climate change; generalist; glaciation; hominid; human evolution; hydrogen isotope; lacustrine deposit; Pleistocene; Turkana Basin
来源期刊Quaternary Science Reviews
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/151341
作者单位Brown University, Department of Earth, Environmental, and Planetary Sciences, 324 Brook Street, Providence, RI 02906, United States; Lamont-Doherty Earth Observatory, Division of Biology and Paleo Environment, 61 Route 9W, Palisades, NY 10964, United States; University of Liverpool, Archaeology, Classics and Egyptology, 8-14 Abercromby Square, Liverpool, L69 7WZ, United Kingdom; Hamilton College, Department of Geosciences, 198 College Hill Road, Clinton, NY 13323, United States; Rutgers University, Department of Earth and Planetary Sciences, 610 Taylor Road, Piscataway, NJ 08854, United States; University of Arizona, Department of Geosciences, 1040 East 4th Street, Tucson, AZ 85721, United States
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Lupien R.L.,Russell J.M.,Grove M.,et al. Abrupt climate change and its influences on hominin evolution during the early Pleistocene in the Turkana Basin; Kenya[J],2020,245.
APA Lupien R.L.,Russell J.M.,Grove M.,Beck C.C.,Feibel C.S.,&Cohen A.S..(2020).Abrupt climate change and its influences on hominin evolution during the early Pleistocene in the Turkana Basin; Kenya.Quaternary Science Reviews,245.
MLA Lupien R.L.,et al."Abrupt climate change and its influences on hominin evolution during the early Pleistocene in the Turkana Basin; Kenya".Quaternary Science Reviews 245(2020).
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