There is a lot of debate about what causes what in climate change. With the current "pause" or reduced rate of warming Ocean Heat Content is being tossed around as proof of some point or another. As support of points, different pictures are presented by different sides or the accuracy of the data is questioned. As I have mentioned in other posts, the deep ocean data is about average for climate science. Accurate enough for a tease, but no where near accurate enough for drawing conclusions.
Geophysical Research Letters As you can see volcanoes are highlighted with a tiny 1998 El Nino blip. The OHC drops then spikes with a curve to a new higher level.
The funny part is all the effort made to remove volcanic, solar and ENSO signals from the temperature records to "prove" that the increasing ocean heat capacity has to be due to something else.