World headed for an El Nino and it could be a big one, scientists say

By Peter Hannam
Updated May 30 2015 - 11:08am, first published May 8 2015 - 3:45pm
El Nino conditions are setting in over the Pacific.
El Nino conditions are setting in over the Pacific.
The most recent El Nino in 2009-10, with its characteristically warm sea-surface temperature anomalies in the central and eastern Pacific. Photo: NASA
The most recent El Nino in 2009-10, with its characteristically warm sea-surface temperature anomalies in the central and eastern Pacific. Photo: NASA

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