Research Article
Revisiting the Question: The Cause of the Solar Cycle Variation of Total Solar Irradiance
Figure 3
Partial wavelet coherence of the daily TSI and sunspot area (after eliminating the effect of 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.