Abstract

Summary. The determination of induced magnetic fields of synoptic ocean movements is considered in the case of horizontal uniformity of the bottom conductivity. The problem of calculation of hydrodynamic parameters is solved by means of induced fields. These appear to depend closely on the appearance of barotropic or baroclinic parts in the synoptic ocean movement. The different properties of fields from parts of the above permit us to separate hydrodynamic parameters of complex ocean movements into barotropic and baroclinic parts by means of magnetic measurements. In recent years there has been great interest in the study of synoptic ocean movement. In this paper we investigate the possibility of determining the values of the hydrodynamical parameters of such movement by means of induced magnetic fields. The magnetic field induced by synoptic currents depends on the spatial and time variation of the water velocity and on the Earth's electrical conductivity structure. In the P-plane approximation, the vertical structure of the water velocity is controlled by ocean density stratification (Monin, Kamenkovich & Kort 1974). The vertical structure of the phenomenon outlined above is described by the following boundary-value problem,

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