Hostname: page-component-78c5997874-ndw9j Total loading time: 0 Render date: 2024-11-05T05:04:53.770Z Has data issue: false hasContentIssue false

14C Level At Mt Chiak and Mt Kyeryong in Korea

Published online by Cambridge University Press:  18 July 2016

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].
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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
Copyright
Copyright © 2002 The Arizona Board of Regents on behalf of the University of Arizona 

References

Grootes, PM, Farwell, GW, Schmidt, FH, Leach, DD, Stuiver, M. 1989. Importance of biosphere CO2 in a subcanopy atmosphere deduced 14C AMS measurements. Radiocarbon 31(3):475–80.CrossRefGoogle Scholar
Hua, Q, Barbetti, M, Worbes, M, Head, J, Levchenko, VA. 1999. Review of radiocarbon data from atmospheric and tree ring samples for the period 1945–1997 AD. IAWA Journal 20:261–83.CrossRefGoogle Scholar
Hua, Q, Barbetti, M, Jacobsen, GE, Zoppi, U, Lawson, EM. 2000. Bomb radiocarbon in annual tree rings from Thailand and Australia. Nuclear Instruments and Methods in Physics Research B172:359–65.Google Scholar
Kim, JC, Lee, CH, Kim, IC, Park, JH, Kang, J, Cheoun, MK, Kim, YD, Moon, CB. 2000. A new AMS facility in Korea. Nuclear Instruments and Methods in Physics Research B172:13–7.Google Scholar
Lee, C, Kim, JC, Park, JH, Kim, IC, Kang, J, Cheoun, MK, Choi, SY, Kim, YD, Moon, CB. 2000. Progress in sample preparation system for the Seoul National University AMS facility. Nuclear Instruments and Methods in Physics Research B172:454–7.Google Scholar
Leung, PL, Stokes, MJ, Qiu, SH, Cai, LZ. 1995. A survey of environmental 14C levels in Hong Kong. Radiocarbon 37(2):505–8.CrossRefGoogle Scholar
Levin, I, Kromer, B, Schoch-Fischer, H, Bruns, M, Münnich, M, Berdau, D, Vogel, JC, Münnich, KO. 1985. 25 years of tropospheric 14C observations in central Europe. Radiocarbon 27(1):119.CrossRefGoogle Scholar
Manning, MR, Melhuish, WH. 1994. In: Boden, TA, Kaiser, DP, Sepanski, RJ, Stoss, FW, editors. Trends 93 – a compendium of data on global change. Oak Ridge National Laboratory: Carbon Dioxide Information Analysis Center. p 173.Google Scholar
Nakamura, T, Nakkai, N, Ohishi, S. 1987. Applications of environmental 14C measured by AMS as a carbon tracer, Nuclear Instruments and Methods in Physics Research B29:355–60.Google Scholar
Nydal, R, Lovseth, K. 1996a. Carbon-14 measurement in atmospheric CO2 from Northern and Southern Hemisphere sites, 1962–1993. Oak Ridge National Laboratory: Carbon Dioxide Information Analysis Center.CrossRefGoogle Scholar
Nydal, R, Gislefoss, J. 1996b. Further application of bomb 14C as a tracer in the atmosphere and ocean. Radiocarbon 38(3):389406.CrossRefGoogle Scholar
Povinec, P, Chudý, M, Šivo, A. 1986. Anthropogenic radiocarbon: past, present, and future. Radiocarbon 28(2A):668–72.CrossRefGoogle Scholar
Sjoren, B, Moldenius, S. 1981. Effects of bleaching parameters on kinetics and stoichiometry of peroxide bleaching of mechanical pulp. Chemistry and Biochemistry of Wood-based Processes and Products 2: 125–31.Google Scholar
Vogel, JS, Southon, JR, Nelson, DE. 1987. Catalyst and binder effects in the use of filamentous graphite for AMS. In: Gove, HE, Litherland, AE, Elmore, D, editor. Proceedings of the 4th International Symposium on Accelerator Mass Spectrometry. Nuclear Instruments and Methods in Physics Research B29:50–6.Google Scholar