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DOI	10.1016/j.quascirev.2019.106071
	Timing and stepwise transitions of the African Humid Period from geochemical proxies in the Nile deep-sea fan sediments
	Ménot G.; Pivot S.; Bouloubassi I.; Davtian N.; Hennekam R.; Bosch D.; Ducassou E.; Bard E.; Migeon S.; Revel M.
发表日期	2020
ISSN	0277-3791
卷号	228
英文摘要	Large fluvial systems, such as the Nile River, allow a basin-scale integrated view of climatological and environmental changes. In this study, we reconstructed the Nile discharge history for the last 20 ka using molecular ratios of glycerol dialkyl glycerol tetraethers (GDGTs) and neodymium (Nd) radiogenic isotopes. By characterizing both the organic and inorganic fractions, we assessed the relevance of the GDGT-based proxies in deltaic environments as tracers of terrigenous origin. A large increase in Nile discharge is documented from 14.8 to 8.4 ka BP reflecting enhanced physical erosion and transport processes from the Ethiopian Traps. We confirmed the primary control of insolation on precipitation on North East Africa through the last 20 ka. The centennial time resolution reached on the sedimentary sequence revealed a step-wise onset and termination of the African Humid Period (AHP) starting at 14.8 ka and ending at 8.4 ka BP, respectively. Our centennial-millennial records allowed furthermore pinpointing the abrupt periods of arid conditions corresponding to the Younger Dryas. These data illustrate the linkage between low and high latitude hydrological variability. © 2019 Elsevier Ltd
英文关键词	African Humid Period; Clastic εNd; GDGT-indices; Nile river
语种	英语
scopus关键词	Glycerol; Environmental change; GDGT-indices; Humid periods; Hydrological variability; Inorganic fractions; Nile rivers; Radiogenic isotopes; Sedimentary sequence; Timing circuits; deep-sea sediment; geochemistry; humid environment; index method; neodymium isotope; paleoclimate; paleoenvironment; proxy climate record; sedimentary sequence; tracer; Younger Dryas; Nile River; Gorgonacea
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/151645
作者单位	Univ Lyon, ENS de Lyon, Université Lyon 1, CNRS, UMR 5276 LGL-TPE, Lyon, F-69364, France; CEREGE, Aix Marseille Univ, CNRS, IRD, INRA, Collège de France, Technopôle de l'Arbois, BP80, Aix-en-Provence, 13545, France; Sorbonne Universités, UPMC Univ Paris 06, CNRS, IRD, MNHN, LOCEAN, 4 place Jussieu, Paris cedex 0575252, France; NIOZ Royal Netherlands Institute for Sea Research, Department of Ocean Systems, and Utrecht University, P.O. Box 59, AB Den Burg, Texel, 1790, Netherlands; Géosciences Montpellier, Université de Montpellier, UMR-CNRS 5243, Montpellier, 34095, France; Université de Bordeaux 1, UMR-CNRS 5805-EPOC, allée Geoffroy St HilairePessac Cedex 33615, France; Geoazur, 250 Rue Albert Einstein, Valbonne-Sophia Antipolis, 06560, France
推荐引用方式 GB/T 7714	Ménot G.,Pivot S.,Bouloubassi I.,et al. Timing and stepwise transitions of the African Humid Period from geochemical proxies in the Nile deep-sea fan sediments[J],2020,228.
APA	Ménot G..,Pivot S..,Bouloubassi I..,Davtian N..,Hennekam R..,...&Revel M..(2020).Timing and stepwise transitions of the African Humid Period from geochemical proxies in the Nile deep-sea fan sediments.Quaternary Science Reviews,228.
MLA	Ménot G.,et al."Timing and stepwise transitions of the African Humid Period from geochemical proxies in the Nile deep-sea fan sediments".Quaternary Science Reviews 228(2020).