Rieger, Schwabe, Suess-de Vries: The Sunny Beats of Resonance

TL;DR

This paper presents a self-consistent model explaining solar periodicities, including the Rieger, Schwabe, and Suess-de Vries cycles, through resonances of wave phenomena with planetary gravitational forces affecting the solar dynamo.

Contribution

It introduces a novel resonance-based explanation linking planetary gravitational forces to multiple solar activity cycles, integrating wave phenomena with the solar dynamo.

Findings

Venus-Earth-Jupiter spring tides excite magneto-Rossby waves.

Magneto-Rossby waves synchronize the solar dynamo with Rieger-type periods.

The Suess-de Vries cycle is explained as a beat period involving the Hale cycle and spin-orbit coupling.

Abstract

We propose a self-consistent explanation of Rieger-type periodicities, the Schwabe cycle, and the Suess-de Vries cycle of the solar dynamo in terms of resonances of various wave phenomena with gravitational forces exerted by the orbiting planets. Starting on the high-frequency side, we show that the two-planet spring tides of Venus, Earth and Jupiter are able to excite magneto-Rossby waves which can be linked with typical Rieger-type periods. We argue then that the 11.07-year beat period of those magneto-Rossby waves synchronizes an underlying conventional $\alpha-\Omega$-dynamo, by periodically changing either the field storage capacity in the tachocline or some portion of the $\alpha$-effect therein. We also strengthen the argument that the Suess-de Vries cycle appears as an 193-year beat period between the 22.14-year Hale cycle and a spin-orbit coupling effect related with the 19.86-year rosette-like motion of the Sun around the barycenter.