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)

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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Answer_zhark_jastp_rev_v2.pdf - Accepted Version
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Official URL: https://doi.org/10.1016/j.jastp.2017.09.019

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: 23 Sep 2018 18:45
URI: http://nrl.northumbria.ac.uk/id/eprint/32920

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