Results 11 to 20 of about 416 (175)
Dynamic mode decomposition of the geomagnetic field over the last two decades
Earth and Planetary Physics, 2023 Earth's magnetic field, which is generated in the liquid outer core through the dynamo action, undergoes changes on timescales of a few years to several million years, yet the underlying mechanisms responsible for the field variations remain to be ...
JuYuan Xu, YuFeng Lin
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BASIC SYSTEMS FOR THE GEOMAGNETIC FIELD [PDF]
Vestnik KRAUNC: Fiziko-Matematičeskie Nauki, 2010 The system of own solenoidal fields of operator Laplace which can be used for decomposition of a geomagnetic field in a kernel of the Earth is described.
Vodinchar G.M., Kruteva L.K.
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ИНВЕРСИИ В ШЕСТИСТРУЙНОЙ МОДЕЛИ ГЕОДИНАМО [PDF]
Vestnik KRAUNC: Fiziko-Matematičeskie Nauki, 2016 We describe a large-scale geodynamo model based on hypothesis about 6-jet convection in the Earth’s core. This hypothesis suggests indirect data of inhomogeneities in the density of the Earth’s core.
Vodinchar G. M. , Feshchenko L. K.
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Fractal Properties of the Magnetic Polarity Scale in the Stochastic Hereditary αω-Dynamo Model
Fractal and Fractional, 2022 We study some fractal properties of the hereditary αω-dynamo model in the two-mode approximation. The phase variables of the model describe the temporal dynamics of the toroidal and poloidal components of the magnetic field.
Gleb Vodinchar , Lyubov Feshchenko
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Visualization of Geodynamo Simulations [PDF]
Proceedings of the XSEDE16 Conference on Diversity, Big Data, and Science at Scale, 2016 Earth's magnetic field undergoes striking variations in direction and strength on a vast spectrum of time scales. Complex motions of the liquid iron core maintain the magnetic field, but the inner workings of this so-called dynamo process are obscured from direct observation and pose significant challenges for theoretical and computational modeling ...
Amit Chourasia +6 more
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Contributions to Geophysics and Geodesy, 2017 Numerical simulations of the geodynamo are becoming more realistic because of advances in computer technology. Here, the geodynamo model is investigated numerically at the extremely low Ekman and magnetic Prandtl numbers using the PARODY dynamo code ...
Ján ŠIMKANIN, Juraj KYSELICA
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Mathematics, 2023 Spectral models are often used in the study of geodynamo problems. Physical fields in these models are presented as stationary basic modes combinations with time-dependent amplitudes. To construct a model it is necessary to calculate the modes parameters,
Gleb Vodinchar, Liubov Feshchenko
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A Model of the Geodynamo [PDF]
Geophysical Journal of the Royal Astronomical Society, 2007 Summary The problem of the generation of the geomagnetic field by convection in the Earth's core is considered. The complete hydromagnetic problem including the Lorentz force is solved in the case of a cylindrical configuration. Because of the dominant effect of rotation this configuration incorporates the essential features of the dynamo process in
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The effect of model errors in ensemble sequential assimilation of geomagnetic field
Earth and Planetary Physics, 2023 Earth’s magnetic field is generated in the fluid outer core through the dynamo process. Over the last decade, data assimilation has been used to retrieve the core dynamics and predict the evolution of the geomagnetic field.
JinFeng Li, YuFeng Lin, KeKe Zhang
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Symposium - International Astronomical Union, 1993 A comparison is made of the differences and similarities between the solar dynamo and the geodynamo. Special attention is paid to the energetics, the dynamics, the role of turbulence, and the α- and ω-sources in these dynamos.
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