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Bayesian inference about Plio-Pleistocene climate transitions in Africa

  • During the last 5 Ma the Earth's ocean-atmosphere system passed through several major transitions, many of which are discussed as possible triggers for human evolution. A classic in this context is the possible influence of the closure of the Panama Strait, the intensification of Northern Hemisphere Glaciation, a stepwise increase in aridity in Africa, and the first appearance of the genus Homo about 2.5 - 2.7 Ma ago. Apart from the fact that the correlation between these events does not necessarily imply causality, many attempts to establish a relationship between climate and evolution fail due to the challenge of precisely localizing an a priori unknown number of changes potentially underlying complex climate records. The kernel-based Bayesian inference approach applied here allows inferring the location, generic shape, and temporal scale of multiple transitions in established records of Plio-Pleistocene African climate. By defining a transparent probabilistic analysis strategy, we are able to identify conjoint changes occurringDuring the last 5 Ma the Earth's ocean-atmosphere system passed through several major transitions, many of which are discussed as possible triggers for human evolution. A classic in this context is the possible influence of the closure of the Panama Strait, the intensification of Northern Hemisphere Glaciation, a stepwise increase in aridity in Africa, and the first appearance of the genus Homo about 2.5 - 2.7 Ma ago. Apart from the fact that the correlation between these events does not necessarily imply causality, many attempts to establish a relationship between climate and evolution fail due to the challenge of precisely localizing an a priori unknown number of changes potentially underlying complex climate records. The kernel-based Bayesian inference approach applied here allows inferring the location, generic shape, and temporal scale of multiple transitions in established records of Plio-Pleistocene African climate. By defining a transparent probabilistic analysis strategy, we are able to identify conjoint changes occurring across the investigated terrigenous dust records from Ocean Drilling Programme (ODP) sites in the Atlantic Ocean (ODP 659), Arabian (ODP 721/722) and Mediterranean Sea (ODP 967). The study indicates a two-step transition in the African climate proxy records at (2.35-2.10) Ma and (1.70 - 1.50) Ma, that may be associated with the reorganization of the Hadley-Walker Circulation. .zeige mehrzeige weniger
Metadaten
Verfasserangaben:Nadine BernerORCiDGND, Martin H. TrauthORCiDGND, Matthias HolschneiderORCiDGND
DOI:https://doi.org/10.1016/j.quascirev.2021.107287
ISSN:0277-3791
ISSN:1873-457X
Titel des übergeordneten Werks (Englisch):Quaternary science reviews : the international multidisciplinary research and review journal
Verlag:Elsevier
Verlagsort:Oxford
Publikationstyp:Wissenschaftlicher Artikel
Sprache:Englisch
Datum der Erstveröffentlichung:01.02.2022
Erscheinungsjahr:2022
Datum der Freischaltung:22.03.2023
Freies Schlagwort / Tag:Bayesian inference; Hadley-Walker Circulation; ODP 659; ODP 721/722; ODP 967; Plio-Pleistocene; climate transition; time series analysis
Band:277
Aufsatznummer:107287
Seitenanzahl:12
Fördernde Institution:Germany Research Foundation (DFG) through the Priority Program SPP 1006; ICDP [TR 419/16]; DFG Graduate School [GRK1364]; Hominin Sites and; Paleolakes Drilling Project [48]
Organisationseinheiten:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Geowissenschaften
DDC-Klassifikation:5 Naturwissenschaften und Mathematik / 55 Geowissenschaften, Geologie / 550 Geowissenschaften
Peer Review:Referiert
Lizenz (Deutsch):License LogoCreative Commons - Namensnennung, 2.0 UK
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