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Magnetic reversal in a geodynamo simulation
, 2022 Rendering of a numerical simulation of the geodynamo. The tubes materialize the magnetic field lines, the white transparent sphere is the Earth, while the inner sphere is the core-mantle boundary showing the intensity of the magnetic field there.The ...
Nathanael Schaeffer (474534) +1 more
core +2 more sources
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
doaj +1 more source
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
openaire +2 more sources
Three distinct reversing modes in the geodynamo [PDF]
, 2016 International audienceThe data that describe the long-term reversing behavior of the geodynamo show strong and sudden changes in magnetic reversal frequency.
Pavlov, V. E., Gallet, Y.
core +2 more sources
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
doaj +1 more source
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.
openaire +1 more source
REVERSALS IN THE 6-CELLS CONVECTION DRIVEN [PDF]
Vestnik KRAUNC: Fiziko-Matematičeskie Nauki, 2015 We describe the large-scale model geodynamo, which based on indirect data of inhomogeneities in the density of the Earth’s core. Convection structure is associated with spherical harmonic Y24 , which defines the basic poloidal component of velocity ...
G.M. Vodinchar, L.K. Feshenko
doaj +1 more source
Decoding the Geodynamo: Quantitative Dependence of Magnetic Field Diagnostics on Dimensionless Control Parameters [PDF]
EPJ Web of ConferencesUnderstanding how planetary magnetic fields are generated and sustained requires careful analysis of how key physical quantities respond to changes in the underlying control parameters.
Peqini Klaudio +4 more
doaj +1 more source
Iridium Communications Satellite Constellation Data for Study of Earth's Magnetic Field
Geochemistry, Geophysics, Geosystems, 2021 Characterization of Earth's magnetic field is key to understanding dynamics of the core. We assess whether Iridium Communications magnetometer data can be used for this purpose since.
Brian J. Anderson +7 more
doaj +1 more source
Geomagnetic Dipole Changes and Upwelling/Downwelling at the Top of the Earth's Core
Frontiers in Earth Science, 2018 The convective state of the top of Earth's outer core is still under debate. Conflicting evidence from seismology and geomagnetism provides arguments for and against a thick stably stratified layer below the core-mantle boundary.
Ludovic Huguet +3 more
doaj +1 more source