Fig. 1: The SPB in the observation and CMIP6 models.
From: El Niño and La Niña asymmetry in short-term predictability on springtime initial condition

a Autocorrelation calculated by Niño3.4 SST anomalies using observations from 1958 to 2021. Red and blue lines denote El Niño and La Niña years, respectively. The top x axis denotes the initial month and corresponding lag month is marked on the lower axis. b Same as a, expect for multi-model mean of CMIP6. c, d Same as b, except for type 1 and type 2, respectively. The range of A, SPB for El Niño and La Niña events is the one standard deviation of these models.