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, V.; Popova, E.; Shepherd, S.; Zharkov, S.

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.

Citation

Zharkova, V., Popova, E., Shepherd, S., & Zharkov, S. (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, 72-82. https://doi.org/10.1016/j.jastp.2017.09.019

• Journal Article Type: Article
• Acceptance Date: Sep 21, 2017
• Online Publication Date: Sep 30, 2017
• Publication Date: 2018-09
• Deposit Date: Sep 17, 2019
• Publicly Available Date: Sep 18, 2019
• Journal: Journal of Atmospheric and Solar-Terrestrial Physics
• Print ISSN: 1364-6826
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 176
• Pages: 72-82
• DOI: https://doi.org/10.1016/j.jastp.2017.09.019
• Keywords: Solar activity; Principal components; Dynamo waves; Gleissberg cycle
• Public URL: https://hull-repository.worktribe.com/output/2108002
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S1364682617304728?via%3Dihub
• Related Public URLs: http://nrl.northumbria.ac.uk/32920/
• Additional Information: ©2019, Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/