Nonlinear analysis of solar cycles

Details Nonlinear analysis of solar cycles Nonlinear analysis of solar cycles

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26a...360..319s&link_type=abstract

Astronomy and Astrophysics, Vol. 360, p.319-330

Astronomy and Astrophysics

Astrophysics

8

Chaos, Methods: Data Analysis, Sun: Sunspots

Scientific paper

In this paper, the recent improvement of the Wolf sunspot time-series by Hoyt and co-workers has been analysed with the Global Flow Reconstruction (GFR) method (Serre et al. 1996a and b). A nonlinear 4-dimensional chaotic model has been extracted from the data which captures the principal characteristic features of the sunspot group time-series. The hypothesis of interactions between magnetic modes is implicitly tested; presumably, this is the cause of the irregular variations of solar cycle amplitudes recorded since the year 1610. The present results indicate that interactions are occurring between few global magnetic modes.

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