Geomagnetic secular variation, core motions and implications for the Earth's wobbles

Details Geomagnetic secular variation, core motions and implications for the Earth's wobbles Geomagnetic secular variation, core motions and implications for the Earth's wobbles

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pepi...49..121h&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 49, Issue 1-2, p. 121-132.

Physics

30

Scientific paper

Motions at the top of the core are known to be responsible for the secular variation of the earth's magnetic field. If this flow is supposed geostrophic, the associated pressure field can have an appropriate geometry to exert a pressure torque upon the elliptical core-mantle boundary and, also, to alter the elastic products of inertia in such a way as to excite the earth's and core's wobbles. The authors consider some schematic excitation functions and the resulting amplitudes of the earth's and core's rotational motions. The proposed mechanism is shown to be efficient for exciting the long-period Markowitz wobble of the rotation axis and also the Chandler wobble if the variations in the pressure field have the right time scales, as indeed suggested by the available secular variation data.

Affiliated with

Also associated with

No associations

Rating

Geomagnetic secular variation, core motions and implications for the Earth's wobbles does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Geomagnetic secular variation, core motions and implications for the Earth's wobbles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Geomagnetic secular variation, core motions and implications for the Earth's wobbles will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1715912