In the top panel, adapted and updated from Petrie (2023), the polar magnetic flux is plotted against time for KPVT and SOLIS (solid lines), and GONG (dotted lines) data. Here the polar region is defined as poleward of ±60°, and the radial flux is plotted, with the axis to the right indicating the mean polar radial field strength. In the bottom panel, updated from Petrie (2013), the mean LOS field is plotted for Wilcox data.