dynamo theory

(redirected from Geomagnetic dynamo)

dynamo theory

[′dī·nə‚mō ‚thē·ə·rē]
(geophysics)
The hypothesis which explains the regular daily variations in the earth's magnetic field in terms of electrical currents in the lower ionosphere, generated by tidal motions of the ionized air across the earth's magnetic field.
References in periodicals archive ?
The award marked the first time that a research group from Japan won the Gordon Bell Prize for Peak-Performance since 2004, when a team led by Professor Akira Kageyama, currently based at Kobe University, won the prize for performing a simulation of a geomagnetic dynamo using the first-generation Earth Simulator installed at the Japan Agency for Marine-Earth Science and Technology (JAMSTEC).
But 20 years ago English geophysicist Keith Runcorn suggested another way to get at the workings of the geomagnetic dynamo humming in the core.