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Radiocarbon and Stable Carbon Isotope Ratio Data from a 4.7-Mlong Sediment Core of Lake Baikal (Southern Siberia, Russia)

Published online by Cambridge University Press:  18 July 2016

Fumiko Watanabe Nara ,
Takahiro Watanabe ,
Toshio Nakamura ,
Takeshi Kakegawa ,
Fumitaka Katamura ,
Koji Shichi ,
Hikaru Takahara ,
Akio Imai  and
Takayoshi Kawai
Fumiko Watanabe Nara*
Affiliation:
Graduate School of Science, Tohoku University, 6-3 Aramaki Aza Aoba, Aoba-ku, Sendai 980–8578, Japan
Takahiro Watanabe
Affiliation:
Graduate School of Science, Tohoku University, 6-3 Aramaki Aza Aoba, Aoba-ku, Sendai 980–8578, Japan
Toshio Nakamura
Affiliation:
Center for Chronological Research, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8602, Japan
Takeshi Kakegawa
Affiliation:
Graduate School of Science, Tohoku University, 6-3 Aramaki Aza Aoba, Aoba-ku, Sendai 980–8578, Japan
Fumitaka Katamura
Affiliation:
Graduate School of Agriculture, Kyoto Prefectural Univ., 1-5 Hangi-cho Shimogamo Sakyo-ku, Kyoto 606-8522, Japan
Koji Shichi
Affiliation:
Forestry and Forest Products Research Institute, 1 Matsunosato, Tsukuba, Ibaraki 305-8687, Japan
Hikaru Takahara
Affiliation:
Graduate School of Agriculture, Kyoto Prefectural Univ., 1-5 Hangi-cho Shimogamo Sakyo-ku, Kyoto 606-8522, Japan
Akio Imai
Affiliation:
National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
Takayoshi Kawai
Affiliation:
Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8602, Japan
*
Corresponding author. Email: narafumi@m.tains.tohoku.ac.jp.
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Abstract

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A sediment core (VER99G12; core length, 4.66 m) was taken from the Buguldeika Saddle of Lake Baikal in 1999. Radiocarbon measurements of total organic carbon (TOC) and pollen concentrate fractions from the VER99G12 core were performed by a Tandetron accelerator mass spectrometry (AMS) system (Model-4130, HVEE) at Nagoya University. The AMS 14C ages showed that the VER99G12 core spans the past ∼30 cal ka BP (from the MIS 3 to present), and the average sedimentation rate of this core was calculated to be 13.6 cm/kyr based on the calibrated ages. This means that the time resolution of VER99G12 sediment samples in this study is better than ∼70–80 yr/cm. Stable carbon isotope ratios of TOC (δ13CTOC) in the VER99G12 core varied widely from about 26.6‰ to 31.3‰ during the last glacial/post-glacial transition period (about 17–12 cal ka BP). Therefore, a rapid change in the carbon sources in Lake Baikal occurred in the last glacial/post-glacial transition period is concluded.

Type
Soils and Sediments
Information
Radiocarbon , Volume 52 , Issue 3: 20th Int. Radiocarbon Conference Proceedings , 2010 , pp. 1449 - 1457
Copyright
Copyright © 2010 by the Arizona Board of Regents on behalf of the University of Arizona 

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