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ggge439-sup-0001-tab01.txtplain text document1KTab-delimited Table 1.
ggge439-sup-0002-n01.gifapplication/gif5033KAnimation 1. Animations of 2-D magnetic field structure. This movie spans parts of three polarity epochs and includes two polarity reversals. Upper Left: Polarity function time series superimposed on relative dipole energy at the CMB (high intensity, dark shaded, low intensity, white), the moving blue ball marks the instance in the reversal shown in the other panels; Upper Right: Magnetic field map (radial component) at surface altitude; Lower Left: Zonally averaged toroidal field; Lower Right: Magnetic field lines of the zonally averaged poloidal field (middle), and magnetic field map at the outer boundary (right). Red (blue) indicates positive (negative) values, respectively.
ggge439-sup-0003-n02.gifapplication/gif4495KAnimation 2. Animations of 3-D isosurfaces spanning the strandard reversal period. Upper right: Polarity function (see caption of animation 1); Lower: zonally averaged magnetic field lines at left, positive (red) and negative (blue) isosurfaces of the poloidal magnetic z-component in the middle, and positive and negative isosurfaces of helicity at right.
ggge439-sup-0004-n03.gifapplication/gif6116KAnimation 3. Animations of 3-D isosurfaces spanning the standard reversal period. Upper right: Polarity function (see caption of Animation (1)); Lower: zonally averaged magnetic field lines at left, positive (red) and negative (blue) isosurfaces of of the toroidal magnetic ϕ-component in the middle, and positive and negative isosurfaces of advection of this magnetic field component at right.

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