Figure 2: Sequence of longitude-depth cross-sections of mean temperature
in the equatorial Pacific Ocean for the months of December 1996, and April,
August, and December of 1997. Also shown are corresponding temperature
anomalies which represent departures of temperatures from long-term
means for the given month. The sequence is more fully described in the
text of this article. (Image source: NOAA)
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El Niño and La Niña.