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Magnetic Helicity and the Solar Dynamo [PDF]

Entropy, 2019
Solar magnetism is believed to originate through dynamo action in the tachocline. Statistical mechanics, in turn, tells us that dynamo action is an inherent property of magnetohydrodynamic (MHD) turbulence, depending essentially on magnetic helicity ...
John V. Shebalin
doaj   +7 more sources

Dynamo Models of the Solar Cycle [PDF]

Living Reviews in Solar Physics, 2005
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 that are nonetheless detailed enough to be comparable to solar cycle ...
Charbonneau Paul
doaj   +8 more sources

The Global Solar Dynamo [PDF]

Space Science Reviews, 2016
A brief summary of the various observations and constraints that underlie solar dynamo research are presented. The arguments that indicate that the solar dynamo is an alpha-omega dynamo of the Babcock-Leighton type are then shortly reviewed. The main open questions that remain are concerned with the subsurface dynamics, including why sunspots emerge at
Mausumi Dikpati, Axel Brandenburg, R H Cameron   +2 more
exaly   +6 more sources

The solar dynamo [PDF]

Geophysical and Astrophysical Fluid Dynamics, 1991
AbstractThe traditionalαΩ-dynamo as a model for the solar cycle has been successful in explaining the butterfly diagram, phase relations between poloidal and toroidal field, and polar branch migration features. Observational and theoretical achievements in recent years have however shaken this picture.
M Stix
exaly   +3 more sources

Helioseismic evidence that the solar dynamo originates near the tachocline [PDF]

Scientific Reports
The exact location of the solar dynamo remains uncertain–whether it operates primarily in the near-surface shear layer, throughout the entire convection zone, or near the tachocline - a region of sharp transition in the solar rotation, located at the ...
Krishnendu Mandal, Alexander G. Kosovichev   +1 more
doaj   +2 more sources

The solar dynamo [PDF]

Philosophical Transactions Series A, Mathematical, Physical, and Engineering Sciences, 2012
The origins of solar magnetism lie below the visible surface of the Sun, in the highly turbulent convection zone. Turbulent convection operates in conjunction with rotational shear, global circulations and intricate boundary layers to produce the rich diversity of magnetic activity we observe.
Mark Miesch
exaly   +3 more sources

External Forcing of the Solar Dynamo

Frontiers in Astronomy and Space Sciences, 2022
In this paper I examine whether external forcing of the solar dynamo on long timescales can produce detectable signal in the form of long term modulation of the magnetic cycle.
Paul Charbonneau
doaj   +3 more sources

Evaluating solar-like behavior in turbulent alpha and Babcock–Leighton mechanisms using non-kinematic nonlinear flux-transport solar dynamos [PDF]

Scientific Reports
In this study, we simulate 30,000 years of solar activity using turbulent-alpha (TA) and Babcock–Leighton (BL) mechanisms in a non-kinematic, nonlinear mean field flux-transport solar dynamo model.
Fadil Inceoglu, Rainer Arlt
doaj   +2 more sources

Dynamo Models of the Solar Cycle

Living Reviews in Solar Physics, 2010
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 that are nonetheless detailed enough to be comparable to solar cycle ...
Paul Charbonneau
doaj   +2 more sources

Magnetic Signatures of Large-Scale Electric Currents in the Earth’s Environment at Middle and Low Latitudes

Atmosphere, 2022
The purpose of space weather is the systemic study of the Sun–Earth system, in order to determine the impact of solar events on the electromagnetic environment of the Earth.
Christine Amory-Mazaudier
doaj   +1 more source