Figure 5: EOF1 in period P1 (a) and period P2 (b); contour interval: 0.25 mm/day. Correlation between the time series of EOF1 and SST anomalies in period P1 (c) and period P2 (d); contour interval: 0.1. Correlation values higher (lower) than 0.2 (−0.2) are significant at a 5% level according to a twotailed Student ttest. 
