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The oceans are vast electrolytic conductors covering 71 percent of the surface of our planet. This immense region offers a wealth of electromagnetic features; the oceanic currents and tides moving trough the earth's magnetic field induce ambient electric and magnetic fields in the seawater, the telluric electric currents and the electric coupling between the ocean and the sea floor generate additional electromagnetic fields, and the ionospheric and magnetospheric electromagnetic fields continuously enrich the electrical landscape intrinsic to our oceans. The electrical properties of the seawater are contingent to the kind of electric fields involved, for applied electric fields in the DC or low-frequency AC range, the ions dissolved in the water are the determinant factor in the conductivity, because their movement constitute the electric current observed in the water. For high frequency electric fields and electromagnetic wave propagation the mechanism of conduction changes and the properties of the water itself are the determinant factor of electric conduction. |
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