New Evidence for Long-Term Persistence in the Sun's Activity

Details New Evidence for Long-Term Persistence in the Sun's Activity New Evidence for Long-Term Persistence in the Sun's Activity

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004soph..220...93o&link_type=abstract

Solar Physics, Volume 220, Issue 1, pp.93-105

Physics

20

Scientific paper

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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