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File: ENSOblog_Nino3.4_SSTA_time_series_20210519_large.png

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Alternate Text: Two graphs showing evolution of tropical Pacific ocean temperatures following all El Niños versus all La Niñas
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Two graphs showing evolution of tropical Pacific ocean temperatures following all El Niños versus all La Niñas

Image caption

Monthly sea surface temperature anomalies in the Niño 3.4 region of the tropical Pacific for (top) all first-year El Niño and (bottom) first-year La Niña winters since 1950, starting in the March before the first-year peak. Climate.gov graph based on ERSSTv5 temperature data.