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SoE2017: Southern Oscillation Index
El Niño conditions prevailed in 2015 and at the start of 2016, followed by ENSO-neutral conditions for much of 2017. -
SoE2015: Southern Oscillation Index
A transition occurred, from a La Niña in early 2012 to a strong El Niño during the second half of 2015. -
SoE2020: Southern Oscillation Index
A strong El Niño occurred from mid-2015 to early 2016, followed by predominantly ENSO-neutral conditions.