Results 21 to 30 of about 22,416 (198)
Effects of Emerging Bipolar Magnetic Regions in Mean-field Dynamo Model of Solar Cycles 23 and 24
The Astrophysical Journal, 2023 We model the physical parameters of Solar Cycles 23 and 24 using a nonlinear dynamical mean-field dynamo model that includes the formation and evolution of bipolar magnetic regions (BMRs). The Parker-type dynamo model consists of a complete MHD system in
V. V. Pipin +2 more
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Philosophical Transactions of the Royal Society 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.
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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
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Differential Rotation for Different-sized Sunspot Groups Early Observed by the OGAUC
The Astrophysical Journal, 2023 Solar differential rotation is an important ingredient of the solar dynamo model, not only because the solar rotation profile is one of the key inputs in a solar dynamo model, but also because it imposes constraints for the solar dynamo model.
Miao Wan +3 more
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Comptes Rendus. Physique, 2008 We shortly review the basic observational facts concerning the solar dynamo. Then, a brief overview of our current understanding of the large-scale evolution of the magnetic field of the Sun is proposed, showing, in particular, some successes and difficulties of the mean-field models.
N. O. Weiss, M. J. Thompson
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The Solar Dynamo and Planetary Dynamo [PDF]
Symposium - International Astronomical Union, 1993 A dynamo driven by flows of differential rotation and global convection in a rotating sphere is reviewed as a model of the solar and planetary dynamos. The flows can amplify a magnetic field from an infinitesimal level and thus can generate a magnetic field.
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Duskside F-region dynamo currents: its relationship with prereversal enhancement of vertical plasma drift [PDF]
Annales Geophysicae, 2010 From magnetic field observations by CHAMP we estimate F-region dynamo current densities near the sunset terminator during solar maximum years from 2001 to 2002.
J. Park +4 more
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Prediction of Sunspot Cycles by Data Assimilation Method [PDF]
, 2008 Despite the known general properties of the solar cycles, a reliable forecast of the 11-year sunspot number variations is still a problem. The difficulties are caused by the apparent chaotic behavior of the sunspot numbers from cycle to cycle and by the ...
Kitiashvili, I. N., Kosovichev, A. G.
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Electric Current Approach Studying Both Auroral Substorms and Solar Flares Together
Frontiers in Astronomy and Space Sciences, 2020 Auroral substorms and solar flares are basically various manifestations of electromagnetic energy dissipation processes, so it is useful to consider both phenomena in terms of a chain of processes, consisting of power supply (dynamo), transmission ...
Syun-Ichi Akasofu
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Solar and stellar dynamos – latest developments [PDF]
Astronomische Nachrichten, 2002 6 pages, 4 figures, Astron Nachr (accepted; proceedings of "1st Potsdam Thinkshop on Sunspots and Starspots", Potsdam, Germany, May 2002)
Brandenburg, Albrecht, Dobler, Wolfgang
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