Fractal dimension and prediction of the sunspot number

Details Fractal dimension and prediction of the sunspot number Fractal dimension and prediction of the sunspot number

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990cha%26a..14..191s&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 14, Issue 2, p. 191-197.

Astronomy and Astrophysics

Astrophysics

Sunspots, Fractal Dimension, Lyapunov Exponent

Scientific paper

We analyzed the 9-day mean series of the daily international sunspot nirber in the period 1932-1982 and found that it is a complex dynamic system which should be described by at least seven independent variables, that its correlation dimension is 6.3 +/- 0.1, that the 2-order Renyi entropy and the maximum Lyapunov exponent are 0.37+/-0.02and0.34+/-0.01 bit/yr, respectively. The corresponding error doubling times are 2.7+/-0.2 and 2.9+/-0.1 yr.

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