Results 61 to 70 of about 3,588 (211)
Estimates of Quantities in a Hall Effect Geodynamo Theory
Advances in Electrical and Electronic Engineering, 2008 Currents, resistances, dynamo constant, Hall voltage coefficient and inductances are estimated for the author’s geodynamo theory incorporating the Hall Effect.
Annraoi M de Paor
doaj
Electronic correlations and transport in iron at Earth’s core conditions
Nature Communications, 2020 The heat and electrical conductivity of Earth’s core matter represent key input quantities for geophysical models of the Earth’s core evolution and geodynamo.
L. V. Pourovskii +3 more
doaj +1 more source
Probabilistic structure of the geodynamo
Physical Review E, 2018 One of the most intriguing features of Earth's axial magnetic dipole field, well-known from the geological record, is its occasional and unpredictable reversal of polarity. Understanding the phenomenon is rendered very difficult by the highly non-linear nature of the underlying magnetohydrodynamic problem. Numerical simulations of the liquid outer core,
Scullard, Christian R, Buffett, Bruce A
openaire +5 more sources
The dynamo bifurcation in rotating spherical shells
, 2009 We investigate the nature of the dynamo bifurcation in a configuration applicable to the Earth's liquid outer core, i.e. in a rotating spherical shell with thermally driven motions.
Dormy, Emmanuel, Morin, Vincent
core +2 more sources
Decadal Stability of Multi‐Scale Core‐Mantle Boundary in Core‐Reflections of Repeating Earthquakes
Geophysical Research Letters, Volume 53, Issue 5, 16 March 2026.Abstract Temporal changes near the core‐mantle boundary (CMB) would trigger insights into ongoing thermal and chemical interactions between the Earth's core and mantle. Here, we search for multidecadal temporal changes in the CMB topography and heterogeneity using waveform similarity analysis of core‐reflected phases (PcP, ScP, and ScS) from global ...
Tianyu Cui +5 more
wiley +1 more source
Geophysical Research LettersThe precipitation of magnesium oxide (MgO) from the Earth's core has been proposed as a potential energy source to power the geodynamo prior to the inner core solidification. Yet, the stable phase and exact amount of MgO exsolution remain elusive.
Jie Deng
doaj +1 more source
An Ensemble Algorithm Based Component for Geomagnetic Data Assimilation
Terrestrial, Atmospheric and Oceanic Sciences, 2015 Geomagnetic data assimilation is one of the most recent developments in geomagnetic studies. It combines geodynamo model outputs and surface geomagnetic observations to provide more accurate estimates of the core dynamic state and provide accurate ...
Zhibin Sun and Weijia Kuang
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Geochemistry, Geophysics, Geosystems, 2022 Statistical studies of paleosecular variation (PSV) are used to infer the structure and behavior of the geomagnetic field. This study presents a new database, paleosecular variation of the Miocene (PSVM), of high‐quality directional data from the Miocene
Y. A. Engbers, R. K. Bono, A. J. Biggin
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Magnetohydrodynamics, 2012 We consider how information on geostrophic flows in the planetary cores, taken from 3D simulations in the sphere, can be used in 2D Parker's geodynamo model with the simple forms of the $ $-quenching. Using cluster computer systems dependence of dynamo equations solution on the magnitudes of $ $- and $ $-effects is studied.
openaire +2 more sources
Transport properties for liquid silicon-oxygen-iron mixtures at Earth's core conditions [PDF]
, 2012 We report on the thermal and electrical conductivities of two liquid silicon-oxygen-iron mixtures (Fe$_{0.82}$Si$_{0.10}$O$_{0.08}$ and Fe$_{0.79}$Si$_{0.08}$O$_{0.13}$), representative of the composition of the Earth's outer core at the relevant ...
Alfè, Dario +3 more
core +2 more sources