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The Radiocarbon Record in Tree Rings of the Last 8000 Years

Published online by Cambridge University Press:  18 July 2016

Hans E Suess*
Affiliation:
Department of Chemistry, University of California, San Diego, La Jolla, California 92093
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Abstract

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It has become generally accepted during the last year that 14C fluctuations, the so-called “wiggles”, observed in wood, dated by its tree rings, do indeed exist. Furthermore the La Jolla measurements show that apart from experimental noise, they do not represent random red noise, but characteristic, recurring features. In 1971, Houtermans found indications for the existence of cyclic components and recent Fourier analyses of all the available data by Neftel and Hartwig show a 200-year component. Cyclic oscillations with other periods appear to be present during limited time intervals. The character of the oscillations is not harmonic. The time derivative of many fluctuations is remarkably constant and such that the 14C rises by 1 percent in about 20 years and decreases by 1 percent in slightly more than twice that length of time. The properties of the overall radiocarbon record have to be considered in attempts to explain the variations in terms of variations of the cosmic ray-production rate and changes of the geochemical distribution of radiocarbon.

Type
Natural 14C Variations
Copyright
Copyright © The American Journal of Science 

References

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