Revisiting the Question: The Cause of the Solar Cycle Variation of Total Solar Irradiance

Figure 5

Wavelet coherence of the daily TSI and Mg II index. The dashed black line indicates the COI where edge effects might distort the picture, and the 95% confidence level is shown as a thick contour, which is estimated by Monte Carlo method. The relative phase relation is shown as arrows (with in-phase pointing right, antiphase pointing left, and TSI leading Mg II index by pointing straight down).