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14C Ages of 43 Consecutive Single-Year Tree Rings Between 2710 and 2655 cal BP Using Accelerator Mass Spectrometry

Published online by Cambridge University Press:  18 July 2016

Kayo Suzuki ,
Hirohisa Sakurai ,
Yui Takahashi ,
Shuichi Gunji ,
Fuyuki Tokanai ,
Hiroyuki Matsuzaki  and
Yoko Sunohara
Kayo Suzuki
Affiliation:
Department of Physics, Yamagata University, 1-4-12 Kojirakawa, Yamagata 990-8560, Japan
Hirohisa Sakurai*
Affiliation:
Department of Physics, Yamagata University, 1-4-12 Kojirakawa, Yamagata 990-8560, Japan
Yui Takahashi
Affiliation:
Department of Physics, Yamagata University, 1-4-12 Kojirakawa, Yamagata 990-8560, Japan
Shuichi Gunji
Affiliation:
Department of Physics, Yamagata University, 1-4-12 Kojirakawa, Yamagata 990-8560, Japan
Fuyuki Tokanai
Affiliation:
Department of Physics, Yamagata University, 1-4-12 Kojirakawa, Yamagata 990-8560, Japan
Hiroyuki Matsuzaki
Affiliation:
Research Center for Nuclear Science and Technology, University of Tokyo, Tokyo 113-0032, Japan
Yoko Sunohara
Affiliation:
Research Center for Nuclear Science and Technology, University of Tokyo, Tokyo 113-0032, Japan
*
Corresponding author. Email: sakurai@sci.kj.yamagata-u.ac.jp
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Abstract

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We have measured the radiocarbon ages of 43 consecutive single-year tree rings using accelerator mass spectrometry (AMS) with a statistical accuracy of ∼2.3%. AMS 14C ages of the 36 viable samples are between 2708 and 2666 cal BP, a period in which the Δ14C of the IntCal04 curve (Reimer et al. 2004) shows an enhancement. The 14C ages of the samples are scattered with a Gaussian distribution around the interpolated IntCal04 calibration curve. The time profile of the deviations of the 36 14C ages from the interpolated IntCal04 calibration curve indicates a linear trend and a characteristic variability rather than a random fluctuation around the curve. The trend indicates a higher gradient than that of the interpolated IntCal04 calibration curve. The profile implies a periodic variation of approximately 11 yr and an amplitude of roughly 18 14C yr.

Type
Articles
Information
Radiocarbon , Volume 49 , Issue 2 , 2007 , pp. 459 - 464
Copyright
Copyright © 2007 by the Arizona Board of Regents on behalf of the University of Arizona 

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