Results 91 to 100 of about 1,386 (209)
Experimental Constraints on an MgO Exsolution‐Driven Geodynamo
, 2019 MgO exsolution has been proposed to drive an early geodynamo. Experimental studies, however, have drawn different conclusions regarding the applicability of MgO exsolution. While many studies suggest that significant Mg can dissolve into the Earth's core,
Du, Zhixue +7 more
core +1 more source
A Heteroclinic model of geodynamo reversals and excursions [PDF]
, 2001 The Earth's magnetic field is by and large a steady dipole, but its history has been punctuated by intermittent excursions and reversals. This is at least superficially similar to the behaviour of differential equations containing structurally stable ...
A.M. Rucklidge +5 more
core +1 more source
A >70‐Myr‐Long Geomagnetic Field Reversal Hyperactivity Across the Ediacaran‐Cambrian Transition
Geophysical Research LettersThe long‐term variation of the geomagnetic field is a key constraint for unraveling the geodynamo processes and the evolution of Earth's deep interior.
Fuyun Shen +6 more
doaj +1 more source
On the mean-field theory of the Karlsruhe Dynamo Experiment [PDF]
Nonlinear Processes in Geophysics, 2002 In the Forschungszentrum Karlsruhe an experiment has been constructed which demonstrates a homogeneous dynamo as is expected to exist in the Earth's interior. This experiment is discussed within the framework of mean-field dynamo theory.
K.-H. Rädler +3 more
doaj
A Study of Stochastic Resonance in the Periodically Forced Rikitake Dynamo
Terrestrial, Atmospheric and Oceanic Sciences, 2007 The geodynamo has widely been thought to be an intuitive and selfsustained model of the Earth¡¦s magnetic field. In this paper, we elucidate how a periodic signal could be embedded in the geomagnetic filed via the mechanism of stochastic resonance in a ...
Chien-Chih Chen Chih-Yuan Tseng
doaj +1 more source
Wavelet analysis on paleomagnetic (and computer simulated) VGP time series
Annals of Geophysics, 2003 We present Continuous Wavelet Transform (CWT) data analysis of Virtual Geomagnetic Pole (VGP) latitude time series. The analyzed time series are sedimentary paleomagnetic and geodynamo simulated data.
A. Siniscalchi +3 more
doaj +1 more source
Rikitake's geodynamo model analysed in terms of classical time series statistics
, 1995 Rikitake's geodynamo model is used to generate synthetic series of geomagnetic reversals which are statistically compared with the real series of reversals.
Marzocchi, W., Mulargia, F., Gonzato, G.
core +1 more source
More stable yet bimodal geodynamo during the Cretaceous superchron?
Geophysical Research Letters, 2016 We report palaeomagnetic and 40Ar/39Ar dating results from two sequences of basaltic lava flows deposited at the same locality in western China, yet separated in time by ~50 Myr: one set lies within the Cretaceous normal superchron at 112–115 Ma and a ...
Florian Lhuillier +8 more
doaj +1 more source
, 2014 The onset and nature of the earliest geomagnetic field is important for understanding the evolution of the core, atmosphere and life on Earth. A record of the early geodynamo is preserved in ancient silicate crystals containing minute magnetic inclusions.
Mamajek, Eric E. +2 more
core +1 more source
An alternate representation of the geomagnetic core field obtained using machine learning
Earth, Planets and SpaceMachine learning (ML) as a tool is rapidly emerging in various branches of contemporary geophysical research. To date, however, rarely has it been applied specifically for the study of Earth’s internal magnetic field and the geodynamo. Prevailing methods
Lukács Kuslits +8 more
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