Short-period geomagnetic secular variation
- 1 September 1984
- journal article
- research article
- Published by Taylor & Francis in Geophysical & Astrophysical Fluid Dynamics
- Vol. 30 (1-2) , 1-78
- https://doi.org/10.1080/03091928408210077
Abstract
In this paper the main problems of the theory of the short-period geomagnetic secular variation are described. An approximate analytical representation of the observational data on both the geomagnetic field variations and the associated variations in the length of the day, the kinematics of the generation of geomagnetic variations in the skin-layer at the core-mantle boundary and the influence of the electrical conductivity of the mantle on the geomagnetic variations are considered. A theory of torsional oscillations in the Earth's core is developed and an attempt is made to evaluate the associated geomagnetic variations. Magnetohydrodynamic effects in a possible thin layer of stably stratified fluid near the core-mantle boundary are investigated.Keywords
This publication has 49 references indexed in Scilit:
- Geomagnetism of Earth's coreReviews of Geophysics, 1983
- The electric field produced in the mantle by the dynamo in the corePhysics of the Earth and Planetary Interiors, 1982
- A stratified core motion inferred from geomagnetic secular variationsPhysics of the Earth and Planetary Interiors, 1981
- Does the whole of the Earth's core convect?Nature, 1980
- Tidal dissipation in the oceans: astronomical, geophysical and oceanographic consequencesPhilosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1977
- Global electrical conductivity of the earthPhysics of the Earth and Planetary Interiors, 1973
- Global geomagnetic sounding — Methods and resultsPhysics of the Earth and Planetary Interiors, 1973
- Kinematics of Geomagnetic Secular Variation in a Perfectly Conducting CorePhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 1968
- The Westward Drift and Geomagnetic Secular ChangeGeophysical Journal of the Royal Astronomical Society, 1968
- On Analysis of the Secular VariationJournal of geomagnetism and geoelectricity, 1965