Secular variations of solar activity (Gleissberg and Suess cycles) have approximately 80–
130 and 200 year periods. They are manifested in both observed and proxy data. Here, we …

Context. Solar magnetic activity shows both smooth secular changes, such as the modern
Grand Maximum, and quite abrupt drops that are denoted as grand minima, such as the …

Cyclic magnetic activity in the Sun and other similar stars is interrupted by episodes of
reduced activity such as the Maunder Minimum. This pattern is reproduced in mean field …

Numerous analyses suggest the existence of various quasi-periodicities in solar activity. The
power spectrum of solar activity recorded in sunspot data is dominated by the∼ 11-yr quasi …

In this work we present the possible variations that the meridional circulation of the Sun
might have undergone during the last 250 years. In order to do this, we reduce an\alpha …

The 'sunspot occurrence probability'defined in Paper I is used to determine the Legendre-
Fourier (LF) terms in the 'rate of emergence of toroidal magnetic flux, Q (θ, t), above the …

The variable magnetic field of the solar photosphere exhibits periodic reversals as a result of
dynamo activity occurring within the solar interior. We decompose the surface field as …

In a recent paper, Durney (2000) has discussed a physically plausible procedure whereby
the dynamo equations describing magnetic field regeneration in Babcock–Leighton models …

The 11 year solar activity cycle is the most prominent periodic manifestation of the
magnetohydrodynamical (MHD) large-scale dynamo operating in the solar interior, yet …

Solar torsional oscillations and the grand activity cycle may have a common origin,
associated with the interaction of differential rotation and the global magnetic field. This is …