气候变化领域集成服务门户(CCPortal): Extended dilation of the radiocarbon time scale between 40;000 and 48;000 y BP and the overlap between Neanderthals and Homo sapiens

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DOI	10.1073/pnas.2012307117
	Extended dilation of the radiocarbon time scale between 40;000 and 48;000 y BP and the overlap between Neanderthals and Homo sapiens
	Bard E.; Heaton T.J.; Talamo S.; Kromer B.; Reimer R.W.; Reimer P.J.
发表日期	2020
ISSN	0027-8424
起始页码	21005
结束页码	21007
卷号	117 期号:35
英文摘要	The new radiocarbon calibration curve (IntCal20) allows us to calculate the gradient of the relationship between 14C age and calendar age over the past 55 millennia before the present (55 ka BP). The new gradient curve exhibits a prolonged and prominent maximum between 48 and 40 ka BP during which the radiocarbon clock runs almost twice as fast as it should. This radiocarbon time dilation is due to the increase in the atmospheric 14C/12C ratio caused by the 14C production rise linked to the transition into the Laschamp geomagnetic excursion centered around 41 ka BP. The major maximum in the gradient from 48 to 40 ka BP is a new feature of the IntCal20 calibration curve, with far-reaching impacts for scientific communities, such as prehistory and paleoclimatology, relying on accurate ages in this time range. To illustrate, we consider the duration of the overlap between Neanderthals and Homo sapiens in Eurasia. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Radiocarbon \| geochronology \| paleomagnetism \| Neanderthal
语种	英语
scopus关键词	carbon 14; archeology; Article; artifact; carbon cycle; fossil; geological time; Homo neanderthalensis; human; magnetic field; paleoclimatology; priority journal; radiation measurement; radioisotope decay; sediment; animal; calibration; Homo neanderthalensis; paleontology; procedures; radiometric dating; Animals; Calibration; Fossils; Humans; Neanderthals; Paleontology; Radiometric Dating
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160826
作者单位	Bard, E., CEREGE, Aix-Marseille University, CNRS, IRD, INRAE, Collège de France, Technopôle de l’Arbois, Aix-en-Provence, 13545, France; Heaton, T.J., School of Mathematics and Statistics, University of Sheffield, Sheffield, S3 7RH, United Kingdom; Talamo, S., Department of Chemistry G. Ciamician, Alma Mater Studiorum, University of Bologna, Bologna, 40126, Italy; Kromer, B., Institute of Environmental Physics, Heidelberg University, Heidelberg, 69120, Germany; Reimer, R.W., CHRONO Centre for Climate, the Environment and Chronology, School of Natural and Built Environment, Queen’s University Belfast, Belfast, BT7 1NN, United Kingdom; Reimer, P.J., CHRONO Centre for Climate, the Environment and Chronology, School of Natural and Built Environment, Queen’s University Belfast, Belfast, BT7 1NN, United Kingdom
推荐引用方式 GB/T 7714	Bard E.,Heaton T.J.,Talamo S.,et al. Extended dilation of the radiocarbon time scale between 40;000 and 48;000 y BP and the overlap between Neanderthals and Homo sapiens[J],2020,117(35).
APA	Bard E.,Heaton T.J.,Talamo S.,Kromer B.,Reimer R.W.,&Reimer P.J..(2020).Extended dilation of the radiocarbon time scale between 40;000 and 48;000 y BP and the overlap between Neanderthals and Homo sapiens.Proceedings of the National Academy of Sciences of the United States of America,117(35).
MLA	Bard E.,et al."Extended dilation of the radiocarbon time scale between 40;000 and 48;000 y BP and the overlap between Neanderthals and Homo sapiens".Proceedings of the National Academy of Sciences of the United States of America 117.35(2020).