Manifestation of 22-year solar magnetic cycle in the imbalance between positive and negative photospheric magnetic fluxes |
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| Authors: | E S Vernova M I Tyasto D G Baranov |
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| Institution: | 1. Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radiowave Propagation, St. Petersburg Branch, Russian Academy of Sciences, Muchnoi per. 2, St. Petersburg, 191023, Russia
2. Ioffe Physical-Technical Institute, Russian Academy of Sciences, Politechnicheskaya ul. 26, St. Petersburg, 194021, Russia
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| Abstract: | Time variations in strong and weak photospheric magnetic fields have been considered based on synoptic maps from the Kitt Peak observatory for 1976?C2003. The magnetic fields of positive and negative polarities of the Northern and Southern hemispheres of the Sun and their imbalance were studied. It has been indicated that different groups of magnetic fields vary with 11-or 22-year periods depending on their values. The difference between positive and negative fluxes for each hemisphere always varies with a 22-year period. For weak fields, the 22-year cycle is related to the manifestation of the global solar magnetic field. For strong fields, the imbalance between positive and negative fluxes reflects the predominant role of leading sunspots in a given solar hemisphere. It has been detected that the total magnetic flux over the entire solar disk varies with an 11-year period in antiphase with the solar activity cycle for the weakest magnetic fields (0?C5 G). |
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