Nature of surface flow in the earth's central core : [prepared for National Aeronautics and Space Administration]

Nature of surface flow in the earth's central core : [prepared for National Aeronautics and Space Administration]

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The contribution to secular change made by the nonuniform velocity of the fluid at the surface of the earth's core in the presence of the earth's main field is described. It is shown that contributions to secular change made by temporal changes in th...