Palynological evidence for abrupt climatic cooling in equatorial Africa at about 43,000-40,000 cal BP
Hamilton, Alan1,3; Taylor, David2
2018-03-01
发表期刊REVIEW OF PALAEOBOTANY AND PALYNOLOGY
ISSN0034-6667
卷号250页码:53-59
摘要The same basal sequence of two pollen zones is found in three previously published pollen diagrams for widely separated sites situated along highlands adjacent to the Albertine Rift in equatorial Africa. Here evidence is presented that is supportive of the hypothesis that the transition between the zones was contemporaneous at all sites and dates to about 43,000-40,000 cal BP. Environmental interpretation of the sequence indicates that there was a major fall in temperature, depressed temperature thereafter persisting until the transition to the postglacial at 14,000-11,500 cal BP. The climate also became drier. Well-dated sediments of this age are rare in equatorial Africa, so comparisons are scarce. However, there is some evidence from the Eastern Arc Mountains, Tanzania, of a similar climatic event at about the same time. Farther afield, there is good evidence for abrupt climatic deterioration at similar to 40,000 cal BP in western Eurasia, where there was accompanying cultural change. Sedimentary basins along the Albertine Rift-margin highlands are especially well suited for palynologically-based investigations of past temperatures. Their relatively well-defined catchment areas result in reduced inputs of pollen derived from vegetation growing under different climatic conditions. (C) 2018 Elsevier B.V. All rights reserved.
关键词Climatic Cooling Quaternary Pollen Analysis Albertine Rift Tectonic Activity
语种英语
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文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/60526
专题植物化学与西部植物资源持续利用国家重点实验室
作者单位1.Chinese Acad Sci, Kunming Inst Bot, Kunming 650204, Yunnan, Peoples R China
2.Natl Univ Singapore, Dept Geog, 21 Lower Kent Ridge Rd, Singapore 119077, Singapore
3.128 Busbridge Lane, Godalming GU7 1QJ, Surrey, England
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Hamilton, Alan,Taylor, David. Palynological evidence for abrupt climatic cooling in equatorial Africa at about 43,000-40,000 cal BP[J]. REVIEW OF PALAEOBOTANY AND PALYNOLOGY,2018,250:53-59.
APA Hamilton, Alan,&Taylor, David.(2018).Palynological evidence for abrupt climatic cooling in equatorial Africa at about 43,000-40,000 cal BP.REVIEW OF PALAEOBOTANY AND PALYNOLOGY,250,53-59.
MLA Hamilton, Alan,et al."Palynological evidence for abrupt climatic cooling in equatorial Africa at about 43,000-40,000 cal BP".REVIEW OF PALAEOBOTANY AND PALYNOLOGY 250(2018):53-59.
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