Figure 3

Comparison between the sunspot number profile and the profiles of low-latitude open flux area (a), the area of the low-latitude extension of polar coronal holes (b) and the area of the low-latitude open flux excluding the polar extension (c). The SSN profile is plotted in black and follows the black Y axis on the right hand side. The red lines are different open flux areas, as indicated in the title of respective panel, and follow the red Y axis on the left hand side.