Calculations of magnetic variations associated with internal ocean waves
Date
1970
Authors
Beal, H. T.
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Abstract
In this thesis calculations are obtained for the magnetic field induced by internal waves of periods in the range 1 min-30 min. Solutions for the induced magnetic (and electric) field are derived for a two-layer ocean of finite depth. The results show that the magnitude of the magnetic field associated with internal waves is, in general, less than that induced by the shorter period surface-waves. However, under suitable conditions the magnetic field can become quite appreciable. For instance, an internal wave of amplitude 2 m and period 4 min, located at a depth of 100 m below the sea surface, induces a field of 0.1 γ at 50 m above and below the surface. A similar wave of only 1.5 min period induces the sane field at a depth of 100 m below the surface.