Fig. 2

Simulated variation of the magnetic field over cycle 19. The red and blue colors correspond to negative and positive toroidal fields, respectively. The solid (dashed) lines represent anti-clockwise (clockwise) orientated field lines of the poloidal field. The snapshots (A)−(F) cover cycle 19, corresponding to t = 1956, 1958, 1960, 1962, 1964, and 1966, respectively.
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