North–South asymmetry of the sunspot indices and its quasi-biennial oscillations

摘要: Abstract The space–time distribution of asymmetry in the area and total number sunspot groups was considered over time interval 1874–2009. behavior these indices activity shown to be similar on both small large scales. Spectral variation analysis (SVAN) applied study spectral characteristics. Quasi–biennial oscillations (QBO) were revealed under discussion. SVAN diagrams for areas numbers sunspots range QBO periods display pronounced similarity. In per se, effects are much weaker: mutual correlation is lower, less pronounced, similarity absent. effect negative between power absolute value a long revealed: increase accompanied by decrease amplitude regardless which hemisphere more active at moment. This underlines global nature relation quadrupole component solar large-scale magnetic field. an independent fundamental characteristic activity, does not reduce classical characteristics 11-year cycle.