Trends,rhythms and events in Plio-Pleistocene African climate |
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| Authors: | Martin H Trauth Juan C Larrasoaña Manfred Mudelsee |
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| Institution: | 1. IDES — Laboratoire des Interactions et Dynamique des Environnements de Surface (UMR 8148), Département des Sciences de la Terre Université Paris-Sud XI, 91405 Orsay, France;2. State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China;3. LSCE — Laboratoire des Sciences du Climat et de l''Environnement (UMR 1572 CEA-CNRS-UVSQ), Domaine du CNRS, Avenue de la Terrasse, F-91118 Gif sur Yvette, France;4. GEOSYSTEMES (FRE CNRS 3298), Université de Lille I, 59655 Villeneuve d''Ascq, France;5. Institut für Umweltphysik, Physik der Umweltarchive, Universität Heidelbergnsérer numérotationligne, Im Neuenheimerfeld 229, 69120 Heidelberg, Germany;6. Royal Netherlands Institute for Sea Research, P.O. Box 59, 1790 AB Den Burg, Netherlands |
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| Abstract: | We analyzed published records of terrigenous dust flux from marine sediments off subtropical West Africa, the eastern Mediterranean Sea, and the Arabian Sea, and lake records from East Africa using statistical methods to detect trends, rhythms and events in Plio-Pleistocene African climate. The critical reassessment of the environmental significance of dust flux and lake records removes the apparent inconsistencies between marine vs. terrestrial records of African climate variability. Based on these results, major steps in mammalian and hominin evolution occurred during episodes of a wetter, but highly variable climate largely controlled by orbitally induced insolation changes in the low latitudes. |
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