Zharkova, Valentina, Popova, Elena, Shepherd, Simon and Zharkov, Sergei (2018) 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). Journal of Atmospheric and Solar-Terrestrial Physics, 176. pp. 72-82. ISSN 1364-6826
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Text (Article)
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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.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | dynamo waves, solar activity, Gleissberg cycle, principal components |
| Subjects: | F300 Physics F500 Astronomy |
| Department: | Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering |
| Depositing User: | Ay Okpokam |
| Date Deposited: | 20 Dec 2017 11:45 |
| Last Modified: | 01 Aug 2021 09:37 |
| URI: | http://nrl.northumbria.ac.uk/id/eprint/32920 |
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