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14C Level At Mt Chiak and Mt Kyeryong in Korea

Published online by Cambridge University Press:  18 July 2016

J H Park ,
J C Kim ,
M K Cheoun ,
I C Kim ,
M Youn ,
Y H Liu  and
E S Kim
J H Park*
Affiliation:
Department of Physics, Seoul National University, Kwanak-ku, Seoul 151-742, Korea
J C Kim
Affiliation:
Department of Physics, Seoul National University, Kwanak-ku, Seoul 151-742, Korea
M K Cheoun
Affiliation:
Department of Physics, Seoul National University, Kwanak-ku, Seoul 151-742, Korea
I C Kim
Affiliation:
Department of Physics, Seoul National University, Kwanak-ku, Seoul 151-742, Korea
M Youn
Affiliation:
Department of Physics, Seoul National University, Kwanak-ku, Seoul 151-742, Korea
Y H Liu
Affiliation:
Department of Physics, Seoul National University, Kwanak-ku, Seoul 151-742, Korea
E S Kim
Affiliation:
Department of Forest Resources, Kookmin University, Seoul 136-702, Korea
*
2Corresponding author. Email: [email protected].
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Abstract

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We have observed A14C concentrations in the northern hemisphere temperate region in the bomb pulse period, using cross-dated tree ring samples. The tree-ring samples were taken from one 70-year-old and two 50-year-old red pines (Pinus densiflora) on Mt Chiak, Korea and from a 50-year-old red pine (Pinus densiflora) on Mt Kyeryong, Korea. Twenty-two tree-ring samples from four red pines ranging from 1950 to 2000 AD were pretreated to obtain holo-cellulose, combusted to CO2 by an element analyzer (EA) and converted to graphite for δ14C measurement using the accelerator mass spectrometry (AMS) facility at Seoul National University. Our results for δ14C showed good agreement with those measured by other researchers at similar latitudes. The observed steady decrease of δ14C from 1965 to 2000 AD is described by a single exponential function with a lifetime τ = 15.99 ± 0.43 yr. This lifetime is similar to that of the high-latitude region in Europe.

Type
Articles
Information
Radiocarbon , Volume 44 , Issue 2 , 2002 , pp. 559 - 566
Copyright
Copyright © 2002 The Arizona Board of Regents on behalf of the University of Arizona 

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