Problems of solar dynamo-cycle

1Kryvodubskyi, VN
1Astronomical Observatory of the Taras Shevchenko National University of Kyiv, Ukraine
Kosm. nauka tehnol. 2003, 9 ;(5-6):147-152
Publication Language: Russian
The results of the researches devoted to overcoming some difficulties of the theory of solar turbulent dynamo are presented. Allowance for magnetic quenching of α -effect and newer helioseismic data extends the possibilities of αΩ -dynamo mechanism for interpretation of the observed regularities and anomalies of the solar magnetism. Inclusion of «magnetic antibuoyancy» effects to model of turbulent reconstruction of global magnetism enables us to impose restrictions on the magnitude of toroidal field excited by Ω -effect near the convection zone bottom. The period of Parker's dynamo-wave calculated in non-linear regime agrees to order of magnitude with observed duration of solar cycle. The use of recent data of helioseismic measurements of the inner rotation in dynamo-process leads to north-south asymmetry of the meridional field. At high-latitude regions of the convection zone, a quadrupolar mode is dominant in the net meridional field, which provides an explanation for the magnetic structure anomaly (apparent "monopole") of the global field observed near the maxima of solar cycles.
Keywords: solar cycles, solar dynamo-cycle, «monopole»
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