Fig. 3.27. Global maps of the Pacific ocean basin show patterns of sea surface temperature during (A) El Niño and (B) La Niña events. Sea surface temperature is presented as compared to long-term average values in those locations. The red- and blue-colored streaks along the equator illustrate hotter-than-average and colder-than-average sea surface temperatures associated with El Niño and La Niña events, respectively.
Image courtesy of National Oceanic and Atmospheric Administration (NOAA)