On the 11-years cycle of solar activity

Each 11-years cycle of solar activity consists of two processes with different physical properties. The variety of shapes of the 11-years curves depends on the way these processes overlap.All events in the photosphere, chromosphere and corona, and all kinds of emissions like the radio- and corpuscular emissions take part in these two processes.Events taking place in the magnetosphere, ionosphere, troposphere and perhaps some chemical and biological events reflect the essential properties of the 11-years cycle.