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Regional Offset of Radiocarbon Concentration and Its Variation in the Korean Atmosphere from AD 1650–1850

Published online by Cambridge University Press:  09 February 2016

Wan Hong ,
Jung Hun Park ,
Gyujun Park ,
Ki Suk Sung ,
Won Kyu Park  and
Jong-Geol Lee
Wan Hong*
Affiliation:
Korea Institute of Geoscience and Mineral Resources (KIGAM), 124 Gwahang-no, Yuseong-gu, Daejeon 305–350, Republic of Korea
Jung Hun Park
Affiliation:
Korea Institute of Geoscience and Mineral Resources (KIGAM), 124 Gwahang-no, Yuseong-gu, Daejeon 305–350, Republic of Korea
Gyujun Park
Affiliation:
Korea Institute of Geoscience and Mineral Resources (KIGAM), 124 Gwahang-no, Yuseong-gu, Daejeon 305–350, Republic of Korea
Ki Suk Sung
Affiliation:
Korea Institute of Geoscience and Mineral Resources (KIGAM), 124 Gwahang-no, Yuseong-gu, Daejeon 305–350, Republic of Korea
Won Kyu Park
Affiliation:
Tree-Ring Material Bank, Chungbuk National University, 52 Naesoodong-Ro, Heungdeok-gu, Cheongju, Chungbuk 361–763, Republic of Korea
Jong-Geol Lee
Affiliation:
Korea Institute of Geoscience and Mineral Resources (KIGAM), 124 Gwahang-no, Yuseong-gu, Daejeon 305–350, Republic of Korea
*
2Corresponding author. Email: whong@kigam.re.kr.
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Abstract

A series of annual tree-ring measurements has been performed in order to reconstruct the radiocarbon concentration variation in the Korean atmosphere from AD 1650 to 1850. The absolute ages of the samples were determined using dendrochronology. Alpha-cellulose extraction was applied to prepare the tree-ring samples for precise 14C measurement. The 14C concentrations of the tree rings were then plotted with the dendrochronological ages and showed that during the period AD 1650–1850, the discrepancy in 14C concentration in the Korean atmosphere from IntCal data is small enough to use IntCal data without any further correction. This is nearly one third of the average offset of the 400 yr from AD 1250 to 1650. One of the probable causes for the regional offset around Korea is the contribution of 14C-depleted CO2 released from the northern Pacific Ocean, where old deep water upwells to the surface. It is likely that the release rate of 14C-depleted CO2 decreased due to the temperature change during the Little Ice Age.

Type
Articles
Information
Radiocarbon , Volume 55 , Issue 2: Proceedings of the 21st International Radiocarbon Conference (Part 1 of 2) , 2013 , pp. 753 - 762
Copyright
Copyright © 2013 by the Arizona Board of Regents on behalf of the University of Arizona 

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