Congruence coefficient between one-point correlation maps for solar minimum and solar maximum multiplied by 100: black contours, contour interval 10, areas with values exceeding 80 shaded. Grid points where the correlation maps for solar maximum and solar minimum are not identical at the 10%, 5%, and 1% significance levels (i.e., are dissimilar enough) are shown in turn by red, orange, and yellow lines. NCEP-NCAR reanalysis (left) and ERA5 reanalysis (right).