Fig. 5: Evolution of Niño-3.4, IOD and IOB indices.
From: Boosting effect of strong western pole of the Indian Ocean Dipole on the decay of El Niño events
a–c Composite patterns of 3-month running mean a Niño-3.4 index, b IOD index, and c IOB index for all El Niño (EN; purple line), FD El Niño (green line), and SD El Niño (blue line). d–f Same as (a–c), but for the tendency of the indices.
