Comment on the paper by Popova et al. “On a role of quadruple component of magnetic field in defining solar activity in grand cycles” |
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Author: | Usoskin, I.1 |
Organizations: |
1Space Climate Research Unit and Sodankyä Geophysical Observatory, 90014 Oulu, Finland |
Format: | comment |
Version: | accepted version |
Access: | open |
Online Access: | PDF Full Text (PDF, 0.1 MB) |
Persistent link: | http://urn.fi/urn:nbn:fi-fe2018082233898 |
Language: | English |
Published: |
Elsevier,
2018
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Publish Date: | 2019-10-07 |
Description: |
AbstractThe paper by Popova et al. presents an oversimplified mathematical model of solar activity with a claim of predicting/postdicting it for several millennia ahead/backwards. The work contains several flaws devaluating the results: (1) the method is unreliable from the point of view of signal processing (it is impossible to make harmonic predictions for thousands of years based on only 35 years of data) and lacks quality control; (2) the result of post-diction apparently contradicts the observational data. (3) theoretical speculations make little sense. To summarize, a multi-harmonic mathematical model, hardly related to full solar dynamo theory, is presented, which is not applicable to realistic solar conditions because of the significant chaotic/stochastic intrinsic component and strong non-stationarity of solar activity. The obtained result is apparently inconsistent with the data in the past and thus cannot be trusted for the future predictions. see all
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Series: |
Journal of atmospheric and solar-terrestrial physics |
ISSN: | 1364-6826 |
ISSN-E: | 1879-1824 |
ISSN-L: | 1364-6826 |
Volume: | 176 |
Pages: | 69 - 71 |
DOI: | 10.1016/j.jastp.2017.09.018 |
OADOI: | https://oadoi.org/10.1016/j.jastp.2017.09.018 |
Type of Publication: |
A1 Journal article – refereed |
Field of Science: |
115 Astronomy and space science |
Subjects: | |
Funding: |
This work was made in the framework of ReSoLVE Centre of Excellence
(Academy of Finland, project no. 272157). |
Academy of Finland Grant Number: |
272157 |
Detailed Information: |
272157 (Academy of Finland Funding decision) |
Copyright information: |
© 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ |
https://creativecommons.org/licenses/by-nc-nd/4.0/ |