Figure 6: A comparison of global wavelet spectra for the Geum River watershed (S0: 1976~2010, S1: 2011–2040, S2: 2041–2070, and S3: 2071–2099). The dashed blue line is the significance for the global wavelet spectrum, assuming the same significance level and background spectrum as in wavelet power spectra. All analyses employed the Morlet wavelet.