Results 71 to 80 of about 416 (175)
Regular reversals in the six-jet geodynamo model
E3S Web of Conferences, 2018 A low-mode geodynamo model is developed, controlled by 6-jet convection in the core of the Earth. The model contains only four modes, representing the fields of temperature, velocity, and two fields of magnetic induction. The magnetic modes was chosen by
Feshchenko Liubov
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A >70‐Myr‐Long Geomagnetic Field Reversal Hyperactivity Across the Ediacaran‐Cambrian Transition
Geophysical Research LettersThe long‐term variation of the geomagnetic field is a key constraint for unraveling the geodynamo processes and the evolution of Earth's deep interior.
Fuyun Shen +6 more
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On the mean-field theory of the Karlsruhe Dynamo Experiment [PDF]
Nonlinear Processes in Geophysics, 2002 In the Forschungszentrum Karlsruhe an experiment has been constructed which demonstrates a homogeneous dynamo as is expected to exist in the Earth's interior. This experiment is discussed within the framework of mean-field dynamo theory.
K.-H. Rädler +3 more
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A Study of Stochastic Resonance in the Periodically Forced Rikitake Dynamo
Terrestrial, Atmospheric and Oceanic Sciences, 2007 The geodynamo has widely been thought to be an intuitive and selfsustained model of the Earth¡¦s magnetic field. In this paper, we elucidate how a periodic signal could be embedded in the geomagnetic filed via the mechanism of stochastic resonance in a ...
Chien-Chih Chen Chih-Yuan Tseng
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An alternate representation of the geomagnetic core field obtained using machine learning
Earth, Planets and SpaceMachine learning (ML) as a tool is rapidly emerging in various branches of contemporary geophysical research. To date, however, rarely has it been applied specifically for the study of Earth’s internal magnetic field and the geodynamo. Prevailing methods
Lukács Kuslits +8 more
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More stable yet bimodal geodynamo during the Cretaceous superchron?
Geophysical Research Letters, 2016 We report palaeomagnetic and 40Ar/39Ar dating results from two sequences of basaltic lava flows deposited at the same locality in western China, yet separated in time by ~50 Myr: one set lies within the Cretaceous normal superchron at 112–115 Ma and a ...
Florian Lhuillier +8 more
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High thermal conductivity of the Earth's core and geodynamo
Vestnik MGTUThe geomagnetic field is generated by dynamo processes in the Earth's core. This process is supported by the cooling of the planet and the growth of the solid core. It is known that the magnetic field existed long before the appearance of the solid core,
Reshetnyak M. Yu.
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Experimental dynamos: from models to applications to the geodynamo
Comptes Rendus. PhysiqueLarmor proposed in 1919 an explanation for the origin of the Sun’s magnetic field. This phenomenon, known as the dynamo effect, is considered to be responsible for most of the magnetic fields of astrophysical objects, including that of the Earth. It took
Pétrélis, François
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Modeling Geomagnetic Field Reversals with Coupled Particles in a Double-Well Potential
Albanian Journal of Natural and Technical SciencesWe study a minimal model of geomagnetic field reversals, inspired by Molina-Cardin et al. (2021), in which two particles evolve in a double-well potential and interact through elastic coupling.
Klaudio Peqini
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Inertial Forces Reproduce the Observed Variations of the Frequency of Geomagnetic Reversals
Albanian Journal of Natural and Technical SciencesUnderstanding the geodynamo is a complex endeavor that heavily relies on advanced numerical modeling. Current magnetohydrodynamic (MHD) models, designed to replicate its behavior, operate within parameter regimes that are significantly removed from the ...
Klaudio Peqini
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