Results 21 to 30 of about 416 (175)
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
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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
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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
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On the Precession Driven Geodynamo [PDF]
Izvestiya, Physics of the Solid Earth, 2006 Formation of flow structures in the Earth’s liquid core enclosed in a precessing and rotating shell (mantle) is examined within the hydrodynamic approach. The kinematics and energetics of the motions in the Earth’s core initiated by precession allow one to regard these motions as a possible geodynamo mechanism at an early evolutionary stage of the ...
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Paleomagnetic Biases Inferred From Numerical Dynamos and the Search for Geodynamo Evolution
Frontiers in Earth Science, 2018 The paleomagnetic record is central to our understanding of the history of the Earth. The orientation and intensity of magnetic minerals preserved in ancient rocks indicate the geodynamo has been alive since at least the Archean and possibly the Hadean ...
Peter E. Driscoll, Cian Wilson
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NUMERICAL SIMULATION IN LOW MODED GEODYNAMOMODEL APPLYING THE PACKAGES OF HIGH PRECISION CALCULATION [PDF]
Vestnik KRAUNC: Fiziko-Matematičeskie Nauki, 2011 The means of high precision calculation are considered, their comparative analysis isfulfilled, application of the most efficient of them for the geodynamo task is regardered.
A.S. Chemarev +2 more
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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
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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
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Asymmetric Dipole Trends in Geodynamo Models and the Paleomagnetic Field
Geochemistry, Geophysics, Geosystems, 2023 Temporal trends in the paleomagnetic dipole moment exhibit the property of positive skewness. On average, positive trends are larger and occur less frequently than negative trends over timescales of several tens of kyr.
B. A. Buffett
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Frontiers in Earth Science, 2022 The Cretaceous Normal Superchron (CNS) was first defined in the 1960s to explain the Cretaceous Quiet Zone in marine magnetic anomaly profiles, which includes no or fewer geomagnetic reversals.
Yutaka Yoshimura
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