Stability of cycle in samplogram and spurious cycles in solar activity
Solar and Stellar Astrophysics
2020-09-22 v1
Abstract
The spectral analysis with stochastic significance cannot distinguish the spurious cycles effectively, because a non-stationary signal can make a significant peak in spectrum. I show that the random separation between the grand extremes such as grand maxima and minima in solar activity can make a spurious but significant peak in spectrum. And it is possible to pick even the weak stable cycle by applying an averaging down-sampling and the differencing to a random signal. This is because both operations variously change the height of peak in spectrum and the spurious cycle is in turn unstable in both operations. I introduce a samplogram showing these operations and stability intuitively.
Keywords
Cite
@article{arxiv.2009.09578,
title = {Stability of cycle in samplogram and spurious cycles in solar activity},
author = {Kim Chol-jun},
journal= {arXiv preprint arXiv:2009.09578},
year = {2020}
}