On the solar origin of the thermoluminescence profile of the GT14 core

Details On the solar origin of the thermoluminescence profile of the GT14 core On the solar origin of the thermoluminescence profile of the GT14 core

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990soph..127..357c&link_type=abstract

(Sun in Time Conference, Tucson, AZ, Mar. 6-10, 1989) Solar Physics (ISSN 0038-0938), vol. 127, June 1990, p. 357-377.

Physics

4

Core Sampling, Power Spectra, Solar Corpuscular Radiation, Solar Terrestrial Interactions, Thermoluminescence, Background Noise, Crystal Defects, Dendrochronology, Solar Cycles, Spectrum Analysis, Sunspots

Scientific paper

The thermoluminescence (TL) profile of the GT14 Ionian Sea core has been recently analyzed in connection with other records of solar activity. Phenomenological similarities among the TL profile, the radiocarbon record in tree-rings, and the variations of the mean annual sunspot number Rz suggest a solar control of the TL signal. This paper considers new readings of the TL profile of the GT14 core which were obtained at different glow temperatures. While the main spectral peaks discussed in previous papers are observed in all readings, a few new significant periodic components may now be separated from the noise background. Among these, a strong 22 yr (Hale) cycle is evident, together with a periodicity of 28.5 yr which has already been detected in the spectrum of the sunspot number series. Finally, the temporal persistency of the main TL periodic components is tested by using a cyclogram method, and the effects of background noise is explored by considering the TL profile of bleached samples.

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