
Scientists classify a strong El Nino when temperatures in the Nino 3.4 region rise between 1.5C and 1.9C above average, while anomalies above 2C are associated with very strong events.
Scientists classify a strong El Nino when temperatures in the Nino 3.4 region rise between 1.5C and 1.9C above average, while anomalies above 2C are associated with very strong events.

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