gleissberg cycle, Tag

Guest Post by Willis Eschenbach ABSTRACT: Slow Fourier Transform (SFT) periodograms reveal the strength of the cycles in the full sunspot dataset (n=314), in the sunspot cycle maxima data alone (n=28), and the sunspot cycle...

Guest Post by Willis Eschenbach Back in the 1940s, a man named Wolfgang Gleissberg was studying sunspot cycles. To do so, in his own words, he introduced a new method, viz: When I introduced the method of secular smoothing...