Journal ArticleDOI
Solar Dynamo Theory
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TLDR
A review on solar dynamo theory is structured around three areas in recent years: (a) global magnetohydrodynamical simulations of convection and magnetic cycles, (b) the turbulent electromotive force and the dynamo saturation problem, and (c) flux transport dynamos, and their application to model cycle fluctuations as mentioned in this paper.Abstract:
The Sun's magnetic field is the engine and energy source driving all phenomena collectively defining solar activity, which in turn structures the whole heliosphere and significantly impacts Earth's atmosphere down at least to the stratosphere. The solar magnetic field is believed to originate through the action of a hydromagnetic dynamo process operating in the Sun's interior, where the strongly turbulent environment of the convection zone leads to flow-field interactions taking place on an extremely wide range of spatial and temporal scales. Following a necessarily brief observational overview of the solar magnetic field and its cycle, this review on solar dynamo theory is structured around three areas in which significant advances have been made in recent years: (a) global magnetohydrodynamical simulations of convection and magnetic cycles, (b) the turbulent electromotive force and the dynamo saturation problem, and (c) flux transport dynamos, and their application to model cycle fluctuations and grand ...read more
Citations
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Journal ArticleDOI
The origin, evolution and signatures of primordial magnetic fields
TL;DR: The linear and nonlinear evolution of the generated primordial fields through the radiation era, including viscous effects are traced, and primordial magnetic fields could strongly influence structure formation, especially on dwarf galaxy scales.
Journal ArticleDOI
Solar forcing for CMIP6 (v3.2)
Katja Matthes,Katja Matthes,Bernd Funke,M. E. Andersson,Luke Barnard,Jürg Beer,Paul Charbonneau,Mark A. Clilverd,Thierry Dudok de Wit,Margit Haberreiter,Aaron T. Hendry,Charles H. Jackman,Matthieu Kretzschmar,Tim Kruschke,Markus Kunze,Ulrike Langematz,Daniel R. Marsh,Amanda C. Maycock,Stergios Misios,Craig J. Rodger,Adam A. Scaife,Annika Seppälä,Ming Shangguan,Miriam Sinnhuber,Kleareti Tourpali,Ilya Usoskin,Max van de Kamp,Pekka T. Verronen,Stefan Versick +28 more
TL;DR: In this paper, the authors provided the recommended solar forcing dataset for CMIP6 and highlighted changes with respect to CMIP5, which is the first time that a recommendation for solar-driven particle forcing has been provided for a CMIP exercise.
Journal ArticleDOI
The origin, evolution and signatures of primordial magnetic fields
TL;DR: In this article, the authors trace the linear and nonlinear evolution of the generated primordial magnetic fields through the radiation era, including viscous effects, and conclude that primordial magnetohydrodynamics could strongly influence structure formation, especially on dwarf galaxy scales.
The origin of morphological asymmetries in bipolar active regions. [magnetic field in solar convective envelope]
Y. Fan,G. H. Fisher,E. E. Deluca +2 more
TL;DR: In this article, a series of 3D numerical simulations was carried out to examine the dynamical evolution of emerging flux loops in the solar convective envelope, and it was found that the magnetic field strength of the leading side of each rising loop is about twice as large as that of the following side at the same depth.
References
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Journal ArticleDOI
The Maunder Minimum
TL;DR: In the years around a sunspot maximum there is seldom a day when a number of spots cannot be seen, and often hundreds are present.
Journal ArticleDOI
Astrophysical magnetic fields and nonlinear dynamo theory
TL;DR: The current understanding of astrophysical magnetic fields is reviewed in this paper, focusing on their generation and maintenance by turbulence, where analytical and numerical results are discussed both for small scale dynamos, which are completely isotropic, and for large scale dynamo, where some form of parity breaking is crucial.
Journal ArticleDOI
Cosmical magnetic fields
TL;DR: Magnetic Field Generation in Electrically-Conducting Fluids by H. K. Moffatt as mentioned in this paper is a seminal work in the field of magnetic field generation in electrically conducting fluids.