New Evidence for Long-Term Persistence in the Sun's Activity |
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| Authors: | MG Ogurtsov |
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| Institution: | (1) A.F. Ioffe Physico-Technical Institute, Russian Academy of Sciences, 194021, Polytechnicheskaya 26, St.-Petersburg, Russia |
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| Abstract: | Possible persistence of sunspot activity was studied using rescaled range and detrended fluctuation analyses. In addition to actual Wolf numbers (1700–2000 A.D.), two solar proxies were used in this research, viz., an annual sunspot proxy obtained for 1090–1700 A.D. and sunspot numbers reconstructed from the decadal radiocarbon series (8005 B.C. – 1895 A.D). The reconstruction was made using a five-box carbon exchange model. Analyses showed that in all cases the scaling exponent is significantly higher than 0.5 in the range of scales from 25 yr up to 3000 yr. This indicates the existence of a long-term memory in solar activity, in agreement with results obtained for other solar indices. |
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