The poloidal geomagnetic field in a differentially rotating upper core layer: Geomagnetic field in a rotating upper core layer

This paper deals with the inverse solution of the induction equation accounting for moving core material. In a layer of the fluid outer core we prescribe the associated velocity field by a differential rotation. The angular velocity near the core–mantle boundary (CMB) corresponds to the mean westward drift of the geomagnetic field. We solve the induction equation for the poloidal magnetic field in...