Figure 3: ENSO-CLIPER adjusted anomaly correlations for all five predictands (Niño-1+2, Niño-3, Niño-4 and Niño-3.4 SST indices and SOI) from lead times ranging from zero to seven seasons based upon initial forecast times of a) 1 January, b) 1 April, c) 1 July and d) 1 October.