Results 91 to 100 of about 3,588 (211)
Brunhes Paleomagnetic Directions and Paleointensities From Northern Hainan Island
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 1, January 2026.Abstract Paleomagnetic studies typically assume that the long‐term, time‐averaged geomagnetic field behaves as a geocentric axial dipole (GAD). While paleodirectional data over the past five million years generally agree with GAD predictions, mid‐to‐low latitude paleointensity records fail to show GAD, with high values from Hawaii.
Mengqing Wang +7 more
wiley +1 more source
Geochemistry, Geophysics, GeosystemsPaleosecular variation analysis is a primary tool for characterizing ancient geomagnetic behavior and its evolution through time. This study presents a new high‐quality directional data set, paleosecular variation of the Paleogene (PSVP), with and ...
Y. A. Engbers +8 more
doaj +1 more source
Geodesy and Geodynamics, 2019 The observed Earth's polar motion on decadal time scales has long been conjectured to be excited by the exchange of equatorial angular momentum between the solid mantle and the fluid outer core, via the mechanism of electromagnetic (EM) core-mantle ...
Weijia Kuang +2 more
doaj +1 more source
A coupled core-mantle evolution: review and future prospects
Progress in Earth and Planetary Science, 2020 In this review, I provide the current status and future prospects for the coupled core-mantle evolution and specifically summarize the constraints arising from geomagnetism and paleomagnetism on the long-term secular variations of the geomagnetic field ...
Takashi Nakagawa
doaj +1 more source
Turbulent Geodynamo simulations
, 2017 This poster presents recent results from turbulent convective geodynamo at low magnetic Prandtl number, and focus on interesting dynamical features such as large-scale flow generation, the different behaviour observed in polar and equatorial regions, as well as temporal and spatial fluctuations.
Schaeffer, Nathanael +3 more
openaire +1 more source
Journal of Geography (Chigaku Zasshi), 2005 Recent progress of numerical simulations on the dynamo process in the core and the mantle convection provides a clue to understanding the origin of global variations of the Earth system during the last 150 Ma, in which long-term variations of geomagnetic reversal frequency and mantle activity are closely related in time.
Yozo HAMANO +2 more
openaire +2 more sources
Virtual Reality Visualization by CAVE with VFIVE and VTK
, 2005 The CAVE-type virtual reality (VR) system was introduced for scientific visualization of large scale data in the plasma simulation community about a decade ago.
Kageyama, Akira +2 more
core +1 more source
Regular reversals in the six-jet geodynamo model
E3S Web of Conferences, 2018 A low-mode geodynamo model is developed, controlled by 6-jet convection in the core of the Earth. The model contains only four modes, representing the fields of temperature, velocity, and two fields of magnetic induction. The magnetic modes was chosen by
Feshchenko Liubov
doaj +1 more source
Transition between viscous dipolar and inertial multipolar dynamos
, 2014 We investigate the transition from steady dipolar to reversing multipolar dynamos. The Earth has been argued to lie close to this transition, which could offer a scenario for geomagnetic reversals.
Dormy, Emmanuel, Oruba, Ludivine
core +3 more sources
Reversals and Large-Scale Variations of the Geomagnetic Field: Similarities and Differences
Russian Journal of Earth SciencesIt is shown that during reversals in geodynamo models the minimum amplitudes of the dipole, quadrupole and octupole coincide. Since the characteristic time of the reversal is close to the oscillations of the large-scale geomagnetic field, a similar ...
Reshetnyak Maxim
doaj +1 more source