Anomalies in the evolution of global and large-scale solar magnetic fields as the precursors of several upcoming low solar cycles

摘要: Anomalies in the solar magnetic fields of various scales are studied. The polar field strength is shown to have decreased steadily during last three cycles. This because increase dipole moment observed from 1915 1976 has changed into a decrease At same time, medium scale (like those isolated coronal holes) been unusually strong cycle. As result, tilt heliospheric current sheet still about 30°. large effective contribution total energy large-scale also confirmed by our calculations multipolarity index. aa-index at cycle minima correlated with height succeeding maxima. set data considered may be indicative possible approach sequence low