Results 101 to 110 of about 1,386 (209)

Magnetization and age of ca. 544 Ma syenite, eastern Canada: Evidence for renewal of the geodynamo

The ca. 565 Ma Ediacaran geodynamo was highly unusual, producing an ultralow field 10 times weaker than present-day value of 8 x 1022 A m2. A ∼5 times rise in field strength is seen in time-averaged single crystal paleointensity data of ca.
Nimmo, Francis, Bleeker, Wouter, Ibañez-Mejia, Mauricio, Bono, Richard K., Cottrell, Rory D., Zhou, Tinghong, Smirnov, Aleksey, Kodama, Kenneth P., Tarduno, John A., Huang, Wentao, Blackman, Eric G.   +10 more
core   +1 more source

High thermal conductivity of the Earth's core and geodynamo

Vestnik MGTU
The 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.
doaj   +1 more source

Effects of driving mechanisms in geodynamo models

, 2000
We compare the influence of different mechanisms for driving, Convection in the Earth's core on the structure of the magnetic and velocity fields using a 3D numerical:dynamo model.
Christensen, U., Kutzner, C.
core   +1 more source

On effect of precession-induced flows in the liquid core for early Earth's history [PDF]

Nonlinear Processes in Geophysics, 2006
Secondary and tertiary flow patterns seen in experiments simulating flow in the Earth's liquid core induced by luni-solar precession of the solid mantle (Vanyo et al., 1995) hint at the development of non-axisymmetric columnar periodic structures. A
S. L. Shalimov, S. L. Shalimov
doaj  

Mean-field concept and direct numerical simulations of rotating magnetoconvection and the geodynamo

, 2006
A comparison is made between mean-field models and direct numerical simulations of rotating magnetoconvection and the geodynamo. The mean-field coefficients are calculated with the fluid velocity taken from the direct numerical simulations.
Schmitt, Dieter, Christensen, Ulrich R., Schrinner, Martin, Raedler, K. -H., Rheinhardt, M., Schmitt, D., Rädler, Karl-Heinz, Rheinhardt, Matthias, Rädler, K., Christensen, U., Schrinner, M.   +10 more
core   +1 more source

Detecting dipolarity of the geomagnetic field in the paleomagnetic record. [PDF]

Proc Natl Acad Sci U S A, 2023
Lhuillier F, Shcherbakov VP, Sycheva NK.
europepmc   +1 more source

Intermittence and peculiarities of a statistic characteristic of the geomagnetic field in geodynamo models

, 2020
© 2017, Pleiades Publishing, Ltd. The analysis of the statistical characteristics of the geomagnetic field generated in the numerical geodynamo models has shown that the distribution of the spherical harmonic coefficients in some cases is not Gaussian ...
Shcherbakov V., Lhuillier F., Khokhlov A.   +2 more
core  

A reduced stochastic model of core surface dynamics based on geodynamo simulations

, 2019
International audienceWe make use of recent geodynamo simulations to propose a reduced stochastic model of the dynamics at the surface of Earth's core.
Huder, Loic, Aubert, Julien, Gillet, Nicolas   +2 more
core   +1 more source

Magnetohydrodynamic Turbulence and the Geodynamo

, 2016
Recent research results concerning forced, dissipative, rotating magnetohydrodynamic (MHD) turbulence will be discussed. In particular, we present new results from long-time Fourier method (periodic box) simulations in which forcing contains varying ...
Shebalin, John V.
core  

Long-term geomagnetic variations: Linking paleomagnetic observations, statistical analyses, and numerical geodynamo simulations [PDF]

, 2017
An interdisciplinary approach that combines the gathering of paleomagnetic observations with the use of sophisticated analysis and numerical geodynamo simulations can help progress our knowledge of long-term variations in paleomagnetic intensity ...
Avery, Margaret
core