Simulated geomagnetic reversals and preferred virtual geomagnetic pole paths
نویسندگان
چکیده
منابع مشابه
Geomagnetic Reversals: Rates, Timescales, Preferred Paths, Statistical Models and Simulations
Paleomagnetic data on geomagnetic reversals are divided into two general categories: times of occurrence, and records of directional and/or intensity changes for transitions at individual locations. Despite considerable efforts expended in acquiring paleomagnetic reversal records, a detailed picture of the reversal process is still lacking, along with any means of clearly identifying when the m...
متن کاملAn examination of simulated geomagnetic reversals from a palaeomagnetic perspective
Four magnetic polarity reversals that occurred during two numerical simulations of the Glatzmaier-Roberts geodynamo display a range of behaviour that resembles records of real reversals of the Earth's magnetic field in some ways, and suggests additional insights in others. Two reversals happened during the homogeneous sim? ulation, which prescribes spatially uniform heat flux at the core-mantle...
متن کاملComment on 'Second-Order Statistical Structure of Geomagnetic Field Reversals'
In a recent paper, Naidu [1975] has proposed that thereversal intervals of the geomagnetic field for the period 0-76 m.y. are not independent. In fact, the author has fitted a firstorder autoregressive moving average model to the data published by Heirtzler e~ a/. [1968]. This conclusion, if true, is of importance because it suggests that the mechanism governing the reversals of the geomagnetic...
متن کاملSimulation of Geomagnetic Reversals Through Magnetic Critical Models
We use numerical simulations of a well-known phase-transition model to study reversals of the geomagnetic field. Each ring current in the geodynamo was supposed to behave as a magnetic spin while the magnetization of the model was supposed to be proportional to the Earth’s magnetic dipole. We have performed a sizedependence study of the calculated quantities. Power laws were obtained for the di...
متن کاملClustering of polarity reversals of the geomagnetic field.
Often in nature the temporal distribution of inhomogeneous stochastic point processes can be modeled as a realization of renewal Poisson processes with a variable rate. Here we investigate one of the classical examples, namely, the temporal distribution of polarity reversals of the geomagnetic field. In spite of the commonly used underlying hypothesis, we show that this process strongly departs...
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ژورنال
عنوان ژورنال: Geophysical Journal International
سال: 2004
ISSN: 0956-540X,1365-246X
DOI: 10.1111/j.1365-246x.2004.02309.x