Fig. 2: Simulated multi-year La Niña frequency and the WWV skewness over the 20th century.
From: Multi-year La Niña frequency tied to southward tropical Pacific wind shift

Inter-model relationship between the simulated multi-year La Niña frequency and the WWV skewness over 1900–1999. The correlation coefficient (Corre. Coeff.), slope, and p value are indicated. Consistent with observation, the strong inter-model relationship suggests that the greater propensity for the tropical Pacific Ocean to discharge, the more the multi-year La Niña tends to occur.