This paper reviews recent advances and current debates in modeling the solar cycle as a
hydromagnetic dynamo process. Emphasis is placed on (relatively) simple dynamo models …

Solar quasi-biennial oscillations (QBOs) with the time scale of 0.6–4 yrs appear to be a basic
feature of the Sun's activity. Observational aspects of QBOs are reviewed on the basis of …

Solar magnetism displays a host of variational timescales of which the enigmatic 11-year
sunspot cycle is most prominent. Recent work has demonstrated that the sunspot cycle can …

Powerful 'space weather'events caused by solar activity pose serious risks to human health,
safety, economic activity and national security. Spikes in deaths due to heart attacks, strokes …

Can atmospheric waves in planet-hosting solar-like stars substantially resonate to tidal
forcing, perhaps at a level of impacting the space weather or even being dynamo-relevant …

Rossby waves arise in thin layers within fluid regions of stars and planets. These global
wave‐like patterns occur due to the variation in Coriolis forces with latitude. In the past …

The influence of a toroidal magnetic field on the dynamics of shallow water waves in the
solar tachocline is studied. A sub-adiabatic temperature gradient in the upper overshoot …

Context. Understanding stellar activity in solar-type stars is crucial for the physics of stellar
atmospheres as well as for ongoing exoplanet programmes. Aims. We aim to test how well …

Solar activity indices vary over the Sun's disk, and various activity parameters are not
considered to be symmetric between the northern and southern hemispheres of the Sun …

We present a nonlinear magnetohydrodynamic shallow-water model for the solar tachocline
(MHD-SWT) that generates quasi-periodic tachocline nonlinear oscillations (TNOs) that can …