The 206-year cycle in tree ring radiocarbon data and in the thermoluminescence profile of a recent sea sediment

Details The 206-year cycle in tree ring radiocarbon data and in the thermoluminescence profile of a recent sea sediment The 206-year cycle in tree ring radiocarbon data and in the thermoluminescence profile of a recent sea sediment

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....9411971c&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, Sept. 1, 1989, p. 11971-11976.

Physics

12

Ocean Bottom, Radioactive Age Determination, Solar Cycles, Thermoluminescence, Phase Shift, Power Spectra, Secular Variations, Solar Terrestrial Interactions, Sunspots, Trees

Scientific paper

The secular variations observed (1) in the thermoluminescence (TL) profile of a recent sea sedimentary core, (2) in the Delta C-14 time series from tree rings, and (3) in the mean annual sunspot number Rz is studied. It is shown that a regular oscillation with a period of approximately 206 years is present in the radiocarbon signal. The comparison between the Delta C-14 secular oscillation and the 206-year TL modulation produced by the beats of two TL waves with close-by decennial periods is considered. The role of the 206-year radiocarbon wave and its possible relationships with the solar activity are finally discussed.

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