Article first published online: 29 DEC 2012
©1995. American Geophysical Union. All Rights Reserved.
Eos, Transactions American Geophysical Union
Volume 76, Issue 45, page 450, 7 November 1995
How to Cite
1995), Pole-arity, Eos Trans. AGU, 76(45), 450–450, doi:10.1029/EO076i045p00450-04.(
- Issue published online: 29 DEC 2012
- Article first published online: 29 DEC 2012
- Cited By
It took 40,000 years of theoretical time, but it finally happened. In a three-dimensional, dynamically consistent model of the convecting fluid core of the Earth, the geomagnetic pole reversed after 40 millennia. The model of the dynamo at the center of the Earth, which was developed by Gary Glatzmaier of Los Alamos National Laboratory and Paul Roberts of UCLA, simulated the generation of the geomagnetic field by factoring in evolving variables of fluid temperature, density, pressure, velocity, and local magnetic fields in the Earth's core. Using a Cray C-90 computer and an algorithm of nonlinear equations, the researchers re-created the Earth's magnetic field for 1-week spans over the course of 40,000 years. Near the end of the simulation, over a period of a thousand years, the geomagnetic field reversed itself.