Results 111 to 120 of about 3,487 (215)
Kinetic helicity and MHD turbulence
, 2000 The issue of dynamical anisotropy in helical three-dimensional magnetohydrodynamic turbulence with a mean magnetic field B₀ is investigated. Using high-resolution direct numerical simulations, we follow the evolution of various isotropic initial states ...
Oughton, Sean, Prandi, Rossella
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Tidal Control of Equatorial Vertical E × B Drift Under Solar Minimum Conditions
Geophysical Research LettersObservations show that equatorial ionospheric vertical drifts during solar minimum differ from the climatology between late afternoon and midnight. By analyzing WACCM‐X simulations, which reproduce this solar cycle dependence, we show that the interplay ...
H.‐L. Liu, A. Maute
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Solar Magnetic Field Reversals and the Role of Dynamo Families
, 2012 International audienceThe 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 observed by both the Wilcox Solar Observatory and
Brun, A.S. +5 more
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Genetic Algorithm for Inferring Model Parameters for Flux Transport Dynamo Simulation
The Astrophysical JournalThe Sun exhibits an 11 yr cyclic variation, maintained by dynamo action in the solar interior. Mean-field flux transport dynamo models have successfully reproduced most of the features observed in solar cycles, while the model includes many free ...
Y. Shimizu, H. Hotta
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Is there a phase constraint for solar dynamo models?
, 2005 The spatio-temporal relationship between the sign of the observed radial component of the magnetic field at the solar surface and the sign of the toroidal field as inferred from Hale's polarity rules for sunspots is usually interpreted as signifying the ...
Schüssler, M. +2 more
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Slow Solar Wind: Origin in an Independent Small‐Scale Solar Dynamo
Geophysical Research LettersSeparation of the solar wind (SW) into three flow types (coronal mass ejections (CMEs), high speed streams (HSSs), and slow solar wind (SSW)) reveals an inverse relationship between the percentage of time Earth spends in SSW during a year and its ...
E. W. Cliver +2 more
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Living Reviews in Solar Physics, 2010 A review of solar cycle prediction methods and their performance is given, including forecasts for cycle 24. The review focuses on those aspects of the solar cycle prediction problem that have a bearing on dynamo theory.
Kristóf Petrovay
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Shedding Light on the Solar Dynamo Using Data-driven Bayesian Parameter Inference
The Astrophysical JournalWe use a zero-dimensional stochastic dynamo model describing the coupled oscillatory behavior of the toroidal and poloidal components of the solar magnetic field.
Simone Ulzega +4 more
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Solar Tachocline Confinement by the Nonaxisymmetric Modes of a Dynamo Magnetic Field
The Astrophysical JournalWe recently presented the first 3D numerical simulation of the solar interior for which tachocline confinement was achieved by a dynamo-generated magnetic field. In this follow-up study, we analyze the degree of confinement as the magnetic field strength
Loren I. Matilsky +3 more
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Stochastic fluctuations of the solar dynamo
, 1992 Attempts in the past to model the irregularities of the solar cycle (such as the Maunder minimum) were based on studies of the nonlinear feedback of magnetic fields on the dynamo source terms. Since the alpha-coefficient is obtained by averaging over the
Choudhuri, AR
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