Results 71 to 80 of about 22,479 (200)
The Astronomical JournalThe solar dynamo is essentially a cyclic process in which the toroidal component of the magnetic field is converted into the poloidal one and vice versa.
Aparup Ghosh +3 more
doaj +1 more source
Modelling variability of solar activity cycles
, 2018 Context. Solar activity cycles vary in amplitude and duration. The variations can be at least partly explained by fluctuations in dynamo parameters. Aims.
Kitchatinov, L. L. +2 more
core +1 more source
Alfv\'en-dynamo balance and magnetic excess in MHD turbulence [PDF]
, 2016 3D Magnetohydrodynamic (MHD) turbulent flows with initially magnetic and kinetic energies at equipartition spontaneously develop a magnetic excess (or residual energy), as well in numerical simulations and in the solar wind. Closure equations obtained in
Grappin, Roland +2 more
core +4 more sources
Universal Time Influence on Stormtime Magnetosphere Ionosphere Coupling
AGU Advances, Volume 7, Issue 2, April 2026.Abstract The offset between Earth's magnetic and rotational axes introduces a diurnal dependence in the high‐latitude EUV exposure of the northern hemisphere (NH) and southern hemisphere (SH). This variation raises the question: Does the Universal Time (UT) of geomagnetic storm onset impact its geospace consequences?
Kalpesh Ghag +6 more
wiley +1 more source
Journal of Physics: Conference Series, 2008 Mean-field dynamo models and 3D magnetohydrodynamic (MHD) simulations of global-scale solar convection provide complementary insights into the origins of cyclic magnetic activity in the Sun. One particular class of mean-field dynamo models, known as the Babcock-Leighton Flux-Transport (BL-FT) modeling approach, has enjoyed much success recently in ...
openaire +1 more source
Solar and Stellar Dynamos [PDF]
Proceedings of the International Astronomical Union, 1993 AbstractRecords of the solar magnetic field extend back for millennia, and its surface properties have been observed for centuries, while helioseismology has recently revealed the Sun's internal rotation and the presence of a tachocline. Dynamo theory has developed to explain these observations, first with idealized models based on mean-field ...
openaire +1 more source
Annales Geophysicae, 1999 Two aspects of solar MHD are discussed in relation to the work of the MHD simulation group at KIS. Photospheric magneto-convection, the nonlinear interaction of magnetic field and convection in a strongly stratified, radiating fluid, is a key process ...
M. Schüssler, M. Schüssler
doaj +1 more source
, 2012 Prediction of the Sun's magnetic activity is important because of its effect on space environment and climate. However, recent efforts to predict the amplitude of the solar cycle have resulted in diverging forecasts with no consensus. Yeates et al. (2008)
Brandenburg +10 more
core +2 more sources
Dynamo models of grand minima [PDF]
, 2011 Since a universally accepted dynamo model of grand minima does not exist at the present time, we concentrate on the physical processes which may be behind the grand minima.
Arnab Rai Choudhuri +21 more
core +1 more source
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 4, April 2026.Abstract We present a new method for paleomagnetic investigations, polarized neutron imaging, a non‐destructive magnetic imaging technique benefiting from the high penetration depth and spin of the neutron allowing spatial characterization of the magnetic field within a sample.
Cédric Holme Qvistgaard +9 more
wiley +1 more source