Open AccessDirect observation of channelling of induced currents
Author(s) -
Boteler D. H.,
Kaiser A. B.,
Ingham M. R.
Publication year - 1987
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1987.tb01645.x
Subject(s) - channelling , geology , perpendicular , current (fluid) , homogeneous , geophysics , dominance (genetics) , magnetic field , physics , geometry , oceanography , ion , chemistry , quantum mechanics , biochemistry , mathematics , gene , thermodynamics
Summary The Cook Strait between the two main islands of New Zealand affords an excellent opportunity to study the channelling of induced oceanic electric currents between regions of much lower conductivity. We report here on simultaneous recordings of magnetic field variations on both islands and the voltage in a cable across the strait, which enabled us to determine the magnitude and direction of the channelled current. The observation of large currents approximately perpendicular to the direction expected in a homogeneous medium clearly demonstrates the dominance of channelling over local induction in the Strait.