The nature of secular variations of the main geomagnetic field

Details The nature of secular variations of the main geomagnetic field The nature of secular variations of the main geomagnetic field

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ge%26ae..29.1001r&link_type=abstract

Geomagnetizm i Aeronomiia (ISSN 0016-7940), vol. 29, Nov.-Dec. 1989, p. 1001-1006. In Russian.

Physics

2

Geomagnetism, Magnetic Variations, Secular Variations, Earth Core, Earth Mantle, Magnetohydrodynamics

Scientific paper

A mechanism is proposed for the excitation of magnetic disturbances that induce secular geomagnetic variations with characteristic times of less than 100 years (e.g., 60-year variations). These disturbances have the form of concentrated flux ropes and loops generated by the fluctuation-type MHD dynamo in the earth's liquid core. The observed variations are caused by ropes situated in the 60-km-thick skin layer near the core-mantle boundary.

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