Estimation of Natural Variability and Detection of Anthropogenic Signal in Summertime Precipitation over South America
Figure 6
(a) Standardized time series of rainfall EOF1 for preindustrial run and wavelet (Morlet) analysis. (b) Standardized time series of index of south Atlantic SST defined as the average over the region 15°S–5°S, 330°E–345°E, and wavelet (Morlet) analysis. In the wavelet analysis, color indicates power in each frequency band and regions that are significant to 5% level are indicated by black solid lines. Values outside the dashed line are affected by time boundaries. Wavelet software was provided by C. Torrence and G. Compo and is available at http://atoc.colorado.edu/research/wavelets/.
