Reply to comment on the paper “ on a role of quadruple component of magnetic field in defining solar activity in grand cycles” by Usoskin (2017)

Valentina Zharkova, Simon Shepherd, Elena Popova, Sergei Zharkov

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)
21 Downloads (Pure)

Abstract

In this communication we provide our answers to the comments by Usoskin (2017) on our recent paper (Popova et al, 2017a). We show that Principal Component Analysis (PCA) allows us to derive eigen vectors with eigen values assigned to variance of solar magnetic field waves from full disk solar magnetograms obtained in cycles 21–23 which came in pairs. The current paper (Popova et al, 2017a) adds the second pair of magnetic waves generated by quadruple magnetic sources. This allows us to recover a centennial cycle, in addition to the grand cycle, and to produce a closer fit to the solar and terrestrial activity features in the past millennium.
Original languageEnglish
Pages (from-to)72-82
Number of pages11
JournalJournal of Atmospheric and Solar-Terrestrial Physics
Volume176
Early online date30 Sep 2017
DOIs
Publication statusPublished - Sep 2018

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