FNS-parameterization of non-stationarity effects in the solar activity dynamics

Abstract

Abstract In paper we present the findings of analyzing the non-stationary effects to a solar activity dynamics. Within the framework of Flicker-Noise Spectroscopy (FNS) we study the Zurich series of Wolf numbers from 1849 to 2009. According to the FNS methodology the properties of complex system evolution are manifested in the low frequency component (the “resonant” part of the signal) of time signal and contain in the specific sets of the frequencies. For another thing the signal also has the high frequency component (“chaotic” part) including the noise and the different types of short time irregularities. The FNS methodology allows to discover the intermittency phenomena in studied dynamics by analyzing the behavior of the nonstationarity factor. We will show that the maximum value of this parameter corresponds the maximum of Wolf number i.e. the solar activity.