Planetary Dynamos Controlled by Rotating Parametric Instability

Details Planetary Dynamos Controlled by Rotating Parametric Instability Planetary Dynamos Controlled by Rotating Parametric Instability

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agusmgp33a..05a&link_type=abstract

American Geophysical Union, Spring Meeting 2004, abstract #GP33A-05

Physics

1507 Core Processes (8115), 1521 Paleointensity, 3210 Modeling, 5440 Magnetic Fields And Magnetism, 5770 Tidal Forces

Scientific paper

The existence of rotating parametric instability (RPI) in Earth's fluid core has been interpreted from sequences of paleointensity data from ocean sediments. An RPI can be produced by straining of fluid streamlines in the core from both the semi-diurnal tide and precession of the mantle. Evidence of a relationship between strain in Earth's core and observed growth rate of an RPI, has led to to renewed interest in externally driven planetary dynamos. Reported here is the relationship between planetary magnetic field strength and tidal work done thus providing evidence for RPI in planetary cores.

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