Figure 5
From: Risks of hydroclimatic regime shifts across the western United States
Wavelet analyses of the filtered time series of water-year flow for selected basins. The abscissa shows time (water year) and the ordinate is modulating periodicity (period in year). The cross-hatched regions on either end indicate the “cone of influence,” where edge effects become important13. There is minimal to no power indicated for periods below 10 years (frequency, 0.1 cycle per year (cpy)) because of the filtering applied to the time series and the low powers in these frequencies (0.1 cpy and higher; i.e., periods below 10 years) are likely due to the leakage intrinsic in the filtering algorithm.
