Physics
Scientific paper
Aug 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977ge%26ae..17..735g&link_type=abstract
Geomagnetizm i Aeronomiia, vol. 17, July-Aug. 1977, p. 735-741. In Russian.
Physics
1
Diurnal Variations, Earth Rotation, Geomagnetism, Secular Variations, Acceleration (Physics), Earth Core, Earth Planetary Structure, Energy Transfer, Harmonic Oscillation
Scientific paper
Two regularities have been observed in the earth's rotation: (1) pulsed accelerations corresponding to the appearance of new foci of the 60-year variations of the geomagnetic field, and (2) harmonic oscillations at 20-year intervals, also having an analog in the geomagnetic field. A possible explanation of these nontidal changes in the rate of the earth's rotation is the redistribution of the moment of rotation between the shells of the earth caused by movements within the liquid core. It is suggested that the mechanism for energy transfer from the core to the mantle is the magnetic field, generated in the core, which moves in an azimuthal direction in relation to the mantle. The mantle is accelerated in the case of an eastward drift of the field, and decelerated in the case of a westward drift.
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