The reversal of the solar polar magnetic fields. III - The large-scale fields and the first major active regions of cycle 22

Details The reversal of the solar polar magnetic fields. III - The large-scale fields and the first major active regions of cycle 22 The reversal of the solar polar magnetic fields. III - The large-scale fields and the first major active regions of cycle 22

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992soph..138...11w&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 138, March 1992, p. 11-21. Research supported by Australian Research Council.

Physics

7

Magnetic Field Inversions, Solar Activity Effects, Solar Cycles, Solar Magnetic Field, Magnetic Field Configurations, Magnetic Signatures, Solar Observatories, Transport Properties

Scientific paper

Observations are presented of the first major active regions and large-scale magnetic field patterns of cycle 22, showing that the emergence of a transequatorial pattern, or cell, of positive flux related to the old-cycle activity is followed by the first new cycle active regions of the longitude range emerging across a neutral line of this cell, which continue to grow and expand across the equator for several rotations. Active regions of both the old and the new cycles emerged across the neutral lines of the cell, in one case across the same transequatorial neutral line during one rotation, suggesting that the formation of transequatorial cell such as these might be a significant step in the transition from cycle 21 to cycle 22. The observed evolution of the new active regions is compared with their theoretical evolution using simulations based on the flux transport equation.

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