Cyclic Evolution and Reversal of the Solar Magnetic Field I: The Large-Scale Magnetic Fields
First published: 2003
Brief summary
Analysis of solar cycles 21-23 finds the large-scale solar magnetic field reverses with the ~11-year sunspot cycle, plus a distinct shorter periodicity of 1.23±0.16 years matching helioseismic tachocline variations.
Article
Cyclic Evolution and Reversal of the Solar Magnetic Field I: The Large-Scale Magnetic Fields is a preprint published by arXiv in 2003. It analyses solar cycles 21-23 and finds the large-scale solar magnetic field reverses with the ~11-year sunspot cycle, plus a distinct shorter periodicity of 1.23±0.16 years matching helioseismic tachocline variations.
The analysis focuses on 1.23 ± 0.16 years (large-scale field oscillation), ~2 years (post-reversal longitudinal oscillation), 11 years (sunspot cycle). It also considers observational solar magnetic data. This gives the cycle claim a specific numerical and evidential setting rather than presenting periodicity only as a visual impression.
The article reports the following result: In evolution of the large-scale magnetic field a periodicity with period 1.23 ± 0.16 year is revealed, which is close to the period found by helioseismological methods in variations of the solar rotation near the tachocline. The interpretation is strongest when measurement uncertainty, nonlinear dynamics, boundary conditions and alternative physical mechanisms are tested explicitly.
For cycles researchers, the article brings together solar magnetic field, magnetic reversals, sunspot cycle, tachocline oscillations. It is relevant to physical and geophysical systems in which oscillation, reversal, recurrence and nonlinear dynamics must be distinguished from random variability.
Because it is a preprint, the work should be read alongside later peer-reviewed publications and independent replications. It remains useful because the proposed cycle, dataset and analytical approach are stated clearly enough to be scrutinised.
Source details and credits
- Source / publisher: arXiv
- Source type: Preprint
- URL type: PDF
- Credits: arXiv
- URL: https://arxiv.org/pdf/astro-ph/0310539