Borković, Damir; Krajcar Bronić, Ines (2021) Long-term variations in tritium activity concentration in precipitation reflect the solar activity cycle. In: Vukanac, Ivana; Rajačić, Milica, (eds.) Zbornik radova - XXXI simpozijum Društva za zaštitu od zračenja Srbije i Crne Gore. Beograd, Srbija, Institut za nuklearne nauke "Vinča", Beograd, pp. 75-81 .
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Abstract
Long-term record (1976-2020) of tritium activity concentration in precipitation in Zagreb, Croatia, was statistically analyzed by the frequency analysis, the Wavelet analysis and sinusoidal fitting. In addition to the 12-month period due to the seasonal variations, strong evidence of the variations with the 10 – 12 year period was obtained by all applied methods. This period may be related to a solar cycle supporting the hypothesis of solar influence on meteoric tritium. A delay of about 30 months was observed between the maxima in the sunspot number and the minima in 3H activity concentration in precipitation and plausibly explained by the life cycle of tritium in the atmosphere. Our finding points to the importance of further monitoring of tritium in precipitation that could contribute to the atmospheric sciences. However, for studies of natural production and relation with the solar cycle, local effects (technogenic 3H)should be minimized or absent.
| Item Type: | Conference or workshop item published in conference proceedings (UNSPECIFIED) |
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| Uncontrolled Keywords: | Tritium activity concentration ; Precipitation ; Zagreb ; Cosmogenic tritium ; The solar cycle |
| Subjects: | NATURAL SCIENCES > Physics NATURAL SCIENCES > Interdisciplinary Natural Sciences NATURAL SCIENCES > Interdisciplinary Natural Sciences > Environmental Science |
| Divisions: | Division of Experimental Physics |
| Depositing User: | Ines Krajcar Bronić |
| Date Deposited: | 11 Nov 2021 06:28 |
| URI: | http://fulir.irb.hr/id/eprint/6582 |
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