Fig. 2: Composite SPO indices for multi-year and single-year ENSO events across CMIP6 models.
From: South Pacific Oscillation contributes to multi-year ENSOs

The mean SPO indices for each CMIP6 model (hollow bars) are presented for a MY El Niño, b SY El Niño, c MY La Niña, and d SY La Niña during the second-year boreal spring. The solid bars on the far right of each subplot represent the ensemble mean of 45 models. Error bars indicate the 95% confidence interval.