Results 101 to 110 of about 3,588 (211)
Direct and inverse cascades in the geodynamo [PDF]
Nonlinear Processes in Geophysics, 2008 The rapid rotation of planets causes cyclonic thermal turbulence in their cores which may generate the large-scale magnetic fields observed outside the planets. We investigate numerically a model based on the geodynamo equations in simplified geometry,
M. Reshetnyak, P. Hejda
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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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Wavelet analysis on paleomagnetic (and computer simulated) VGP time series
Annals of Geophysics, 2003 We present Continuous Wavelet Transform (CWT) data analysis of Virtual Geomagnetic Pole (VGP) latitude time series. The analyzed time series are sedimentary paleomagnetic and geodynamo simulated data.
A. Siniscalchi +3 more
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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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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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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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The scientific case for magnetic field satellites [PDF]
To make full use of modern magnetic data and the paleomagnetic record, we must greatly improve our understanding of how the geodynamo system works. It is clearly nonlinear, probably chaotic, and its dimensionless parameters cannot yet be reproduced on a ...
Backus, George E. +3 more
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Constraining the heat flow out of a planetary core over geological time remains a significant challenge, as the extreme pressures and temperatures involved push the limits of experimental capabilities. However, this heat flow is crucial for understanding planetary processes that are often linked to habitability in planetary sciences. A geodynamo driven
Louis Müller +2 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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