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| Neolithic Subpluvial | |
|---|---|
| Name | Neolithic Subpluvial |
| Period | Holocene |
| Start | c. 7500 BP |
| End | c. 3500 BP |
| Location | Sahara, Sahel, Nile Valley, Arabian Peninsula |
| Cause | African Humid Period processes |
Neolithic Subpluvial The Neolithic Subpluvial was a mid-Holocene humid interval that transformed arid landscapes in North Africa and adjacent regions, driven by shifts in insolation, monsoon dynamics, and vegetation feedbacks. Scholars from institutions such as the Max Planck Institute for Chemistry, University of Cambridge, and Smithsonian Institution have linked the event to wider Holocene climate variability recorded in archives examined by teams at ETH Zurich, Columbia University, and the British Museum.
The term denotes a multi-millennial humid phase traditionally dated to roughly 7500–3500 calibrated years before present, invoked in literature by researchers working with chronologies from the Radiocarbon dating community, the IntCal calibration curve, and datasets compiled by the National Oceanic and Atmospheric Administration. Chronologies published in journals associated with the Royal Society and the American Geophysical Union align the Neolithic Subpluvial with the broader African Humid Period, overlapping intervals identified in records studied by teams at CNRS, L’Institut de recherche pour le développement, and PLOS ONE-affiliated projects. Debates about onset and termination dates reference datasets from the Greenland Ice Sheet Project (GISP), the European Project for Ice Coring in Antarctica (EPICA), and lake-sediment chronologies curated at the Natural History Museum, London.
Explanatory frameworks draw on orbital forcing described by researchers at NASA, University of Arizona, and Université de Liège, particularly precessional changes that intensified the African monsoon and summer insolation in the Northern Hemisphere. Climate-modeling groups at MPI-Met, NCAR, and Hadley Centre reproduce northward shifts of the Intertropical Convergence Zone and strengthened monsoon circulation, consistent with hypotheses developed at Lamont–Doherty Earth Observatory and the Potsdam Institute for Climate Impact Research. Vegetation–albedo feedbacks emphasized in studies by IPCC authors and paleoecologists at University of Paris and University of California, Berkeley amplified precipitation changes, while freshwater forcing from Meltwater pulse 1A and sea-surface temperature anomalies cataloged by NOAA modulated regional climate patterns.
The humid conditions extended across the Sahara Desert, the Sahel, the Nile Valley, parts of the Horn of Africa, and the Arabian Peninsula, as inferred from lake highstands, river reactivation, and expansion of wooded savanna recorded near sites excavated by teams from University of Oxford, Boston University, and Cairo University. Paleolandscapes reconstructed by researchers at University of Cologne, University of Ghent, and University of Khartoum show lakes such as Lake Chad and paleorivers like the Wadi Howar at higher stands, influencing biodiversity patterns documented by curators at the Natural History Museum of Bern and the Royal Botanic Gardens, Kew. Faunal assemblages analyzed by specialists affiliated with the Smithsonian Conservation Biology Institute and the Max Planck Institute for Evolutionary Anthropology indicate range shifts for taxa comparable to those reported in the fossil records curated by the Naturhistorisches Museum Wien and the University of Leiden.
Populations across the transformed landscapes developed diverse subsistence strategies evidenced by archaeological projects led by teams from University of Chicago, University of Pennsylvania, and University College London. Material culture sequences from sites investigated by the British Institute in Eastern Africa, Institute of Archaeology, Cairo University, and the International Union for Quaternary Research include ceramics, microlithic industries, and evidence for pastoralism paralleling regional trajectories discussed in syntheses by scholars at École pratique des hautes études and Leiden University. Emergence of early irrigation practices in the Nile Delta and increased sedentism at lake-margin settlements studied by researchers at University of Khartoum and University of Bergen suggest social reorganization comparable to transitions documented in the Fertile Crescent and by teams at Israel Antiquities Authority. Genetic studies from consortia involving Max Planck Institute for Evolutionary Anthropology and Wellcome Sanger Institute explore population movements contemporaneous with environmental shifts.
Proxy archives include pollen spectra from cores analyzed by groups at University of Amsterdam, isotopic profiles from speleothems collected with collaboration from the University of Bristol and University of Bern, and ostracod and diatom assemblages studied by laboratories at University of Milan and University of Heidelberg. Geomorphological mapping by researchers at CNRS and remote-sensing imagery employed by teams at European Space Agency and NASA Goddard document paleolake footprints, while charcoal records processed at Max Planck Institute for Chemistry and sedimentary ancient DNA studies undertaken with participation from the Centre for Ecological and Evolutionary Synthesis corroborate vegetation shifts. Marine cores off the West African coast and the Red Sea analyzed by investigators at Woods Hole Oceanographic Institution and University of Barcelona provide complementary sea-surface temperature and dust flux reconstructions.
Scholarly debate involves the spatial uniformity, chronology, and driving mechanisms of the humid phase, with critiques from model–data comparison studies published by groups at Purdue University, University of Hamburg, and University of Copenhagen. Alternative framings emphasize regional heterogeneity highlighted by fieldwork from teams at University of Marrakesh, Addis Ababa University, and University of Khartoum, and question simplistic links to orbital forcing as argued in papers associated with the Royal Geographical Society. The role of human land use in amplifying or dampening hydroclimate changes is explored by interdisciplinary consortia including researchers from University of Oxford, ETH Zurich, and the Stockholm Resilience Centre, ensuring continued revision of narratives advanced in landmark syntheses by the American Association for the Advancement of Science.
Category:Holocene climate events