Abstract
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 anuual sunspot number R z suggest a solar control of the TL signal. In this paper we consider 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. We finally test the temporal persistency of the main TL periodic components by using a cyclogram method and we explore the effects of background noise by considering the TL profile of bleached samples.
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Bendat, J. S. and Piersol, A. G.: 1971, Random Data: Analysis and Measurement Procedures, Wiley-Interscience, New York.
Cini Castagnoli, G. and Bonino, G.: 1985, Nuclear Tracks 10, 759.
Cini Castagnoli, G. and Bonino, G.: 1988, in G. Cini Castagnoli (ed.), Solar-Terrestrial Relationships and the Earth Environment in the Last Millennia, Proc. of the Int. School of Physios ‘E. Fermi’, Course XCV (1985), Elsevier, Amsterdam, p. 317.
Cini Castagnoli, G., Bonino, G., and Provenzale, A.: 1988a, Nuovo Cimento 11C, 1.
Cini Castagnoli, G., Bonino, G., and Provenzale, A.: 1988b, Solar Phys. 117, 187.
Cini Castagnoli, G., Bonino, G., and Provenzale, A.: 1989, J. Geophys. Res. 94, 11971.
Cini Castagnoli, G., Bonino, G., Provenzale, A., and Serio, M.: 1989, in J. C. Pecker and S. K. Runcorn (eds.), The Earth Climate and Variability of the Sun over Recent Millennia: Geophysical, Astronomical and Archaeological Aspects, The Royal Society Press, London (in press).
Cohen, T. J. and Lintz, P. R.: 1974, Nature 250, 398.
Galli, M.: 1988, in G. Cini Castagnoli (ed.), Solar-Terrestrial Relationships and the Earth Environment in the Last Millennia, Proc. of the Int. School of Physics ‘E. Fermi’, Course XCV (1985), Elsevier, Amsterdam, p. 246.
Krishnaswamy, S., Lal, D., Martin, J. M., and Meybeck, M.: 1971, Earth Planet. Sci. Letter 11, 407.
Miono, S. and Ohta, M.: 1979, in Proc. 16th Int. Cosmic Ray Conf. 2, 263.
Otaola, J. A. and Zenteno, G.: 1983, Solar Phys. 89, 209.
Prodi, F. and Fea, G.: 1979, J. Geophys. Res. 84, 6951.
Sonett, C. P.: 1984, Rev. Geophys. Space Phys. 22, 239.
Stuiver, M. and Braziunas, T. F.: 1989, Nature 338, 405.
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Cini Castagnoli, G., Bonino, G., Provenzale, A. et al. On the solar origin of the thermoluminescence profile of the GT14 core. Sol Phys 127, 357–377 (1990). https://doi.org/10.1007/BF00152174
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DOI: https://doi.org/10.1007/BF00152174