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Recent 14C Activity in the Atmosphere, “Clean Air” and the Chernobyl Effect

Published online by Cambridge University Press:  18 July 2016

Ingrid U Olsson
Ingrid U Olsson*
Affiliation:
Department of Physics, Uppsala University Box 530, S-751 21 Uppsala, Sweden
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Abstract

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Although the Chernobyl accident caused increased 14C levels in certain areas, it has been difficult to prove that it had any effect in two areas of Sweden and one on Svalbard (Spitsbergen), where the precipitation and wind conditions were such that the γ-active fall-out was negligible. Knowledge of the steady regional decrease and annual variations at high latitudes, where the pollution from fossil fuel is less than in central Europe, is essential for global studies of the CO2 cycle. The present 14C excess is a net effect of the 14C supply, mainly from tests of nuclear weapons, and dilution, by 14C-free, fossil-fuel consumption. In Sweden, at these northern latitudes, the 14C excess is steadily slightly higher than for “clean air” in central Europe. Annual variations are also smaller in Sweden and Svalbard than in central Europe. The normal 14C excess on Svalbard is slightly less than in Sweden. Detailed results, especially from autumn 1984 to autumn 1987, are given for atmospheric CO2 collected in northern Sweden (Abisko) and on Svalbard (Kapp Linné) and for some atmospheric samples and plant material collected ca 50km east of Uppsala, very close to heavily polluted areas.

Type
III. Global 14C Variations
Information
Radiocarbon , Volume 31 , Issue 3: June 20-25, 1988 Dubrovnik, Yugoslavia , 1989 , pp. 740 - 746
Copyright
Copyright © The American Journal of Science 

References

Druffel, E R M, 1985, Detection of El Niño and decade time scale variations of sea surface temperature from banded coral records: Implications for the carbon dioxide cycle, in Sundquist, E T and Broecker, W S, eds, The carbon cycle and atmospheric CO2: Natural variations archean to present: Geophys Monog, v 32, p 111–122.Google Scholar
Graham, N E and White, W B, 1988, The El Niño cycle: A natural oscillator of the Pacific Ocean – atmosphere system: Science, v 240, p 1293–1302.CrossRefGoogle Scholar
Levin, I, Kromer, B, Schoch-Fischer, H, Bruns, M, Münnich, M, Berdau, D, Vogel, J C and Münnich, K O, 1985, 25 years of tropospheric 14C observations in central Europe: Radiocarbon, v 27, no. 1, p 1–19.Google Scholar
Nydal, R and Lövseth, K, 1983, Tracing bomb 14C in the atmosphere 1962–1980: Jour Geophys Research, v 88, no. C6, p 3621–3642.Google Scholar
Olsson, I U, 1979, The radiocarbon contents of various reservoirs, in Berger, R and Suess, H E, eds, Radiocarbon dating, Internatl 14C conf, 9th, Proc: Berkeley, Univ California Press, p 613–618.CrossRefGoogle Scholar
Olsson, I U, 1988, Low-level counting using gas-filled counters as applied to 14C dating with emphasis on reliability, in Garcia-Leon, M and Madurga, G, eds, Low-level measurements and their applications to environmental radioactivity: World Scientific, p 171–223.Google Scholar
Olsson, I U and Karlén, I, 1965, Uppsala radiocarbon measurements VI: Radiocarbon, v 7, p 331–335.Google Scholar
Olsson, I U and Klasson, M, 1970, Uppsala radiocarbon measurements X: Radiocarbon, v 12, no. 1, p 281–284.CrossRefGoogle Scholar
Stenberg, A and Olsson, I U, Uppsala radiocarbon measurements VIII: Radiocarbon, v 9, p 471–476.Google Scholar
Stuiver, M, 1982, A high-precision calibration of the AD radiocarbon time scale: Radiocarbon, v 24, no. 1, p 1–26.Google Scholar