The European Centre for Medium-Range Weather Forecasts (ECMWF) provides illustrations of the “Potential Temperature Along the Equator”, which are cross-sectional presentations of equatorial subsurface temperature for the Indian, Pacific, and Atlantic Oceans. Refer to Figure 1.
Here’s a link to the ECMWF main webpage:
And here’s a link to their Zonal Sections pages:
The video that follows is intended to help the reader visualize of the subsurface processes that take place during El Nino events, and what better El Nino events to examine than the three significant El Ninos of 1982/83, 1986/87/88, and 1997/98.
The first video in the series is the introduction and the presentation of the 1997/98 El Nino. A second video dealing with the 1982/83 and 1986/87/88 El Nino events will follow. The video is over 6 minutes long, but it goes quickly.