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Fig. 8.

image

Backbone series of plage areas by using as reference the series from RP1 (dashed black), Ko (solid blue), MW (dashed green), and the average backbone of the MW and Ko series after their cross-calibration to the RP1 one (dashed red). Shown are annual median values (lines) along with the asymmetric 1σ interval (shaded surfaces). The solar cycle numbers are given below the curves.

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