Plio-Pleistocene African Climate
Abstract
Marine records of African climate variability document a shift toward more arid conditions after 2.8 million years ago (Ma), evidently resulting from remote forcing by cold North Atlantic sea-surface temperatures associated with the onset of Northern Hemisphere glacial cycles. African climate before 2.8 Ma was regulated by low-latitude insolation forcing of monsoonal climate due to Earth orbital precession. Major steps in the evolution of African hominids and other vertebrates are coincident with shifts to more arid, open conditions near 2.8 Ma, 1.7 Ma, and 1.0 Ma, suggesting that some Pliocene (Plio)-Pleistocene speciation events may have been climatically mediated.
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The derived craniofacial features of Australopithecus species have long been interpreted as adaptations to mechanically tough or hard plant foods that dominated in African environments during late Pliocene aridification at or before 2.8-2.7 Ma.
“These derived features have long been interpreted as adaptations to mechanically tough or hard plant foods that dominated in African environments during a period of aridification in the late Pliocene (≤ 2.8-2.7 Ma) 20,21”
From The evolutionary history of the human face (2019) · cites this paper as [20]
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- Authors
- deMenocal, P. B.
- Affiliations
- Lamont-Doherty Earth Observatory (US)
- Corresponding author
- deMenocal, Peter B.
- ORCID
- deMenocal, Peter B.
- Venue
- Science
- Published
- 1995-10-06
- Volume
- 270
- Issue
- 5233
- Pages
- 53-59
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2008205524
- Cited by
- 1,241
- References
- 66
- Citations by year
- 2026: 27 · 2025: 37 · 2024: 39 · 2023: 40 · 2022: 54 · 2021: 51 · 2020: 79 · 2019: 53 · 2018: 39 · 2017: 36 · 2016: 51 · 2015: 41 · 2014: 49 · 2013: 54 · 2012: 46
- FWCI
- 13.26
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Science (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Geology and Paleoclimatology Research
- Social Sciences › Anthropology › Pleistocene-Era Hominins and Archaeology
- Physical Sciences › Environmental Science › Global and Planetary Change › Climate variability and models
- Keywords
- African climate, Plio-Pleistocene, aridification, monsoon, orbital precession, North Atlantic sea surface temperature, Northern Hemisphere glaciation, hominin evolution, paleoclimate, marine sediment records
- MeSH terms
- Africa, Animals, Climate, Biological Evolution, Fossils, Humans, Hominidae, Geologic Sediments
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