Yeah, Sure Global Warming is hiding in the ocean. Probably in the same place the mermaids and Kraken are hiding. Also, what law of physics allows hot water to sink below cold? Obviously none of these fools have tried to heat a large body of water by modifying the temperature of the atmosphere above the water.
Read recently that there is more heat in the top 10 feet of the ocean then in all the atmosphere.
Recently the global atmospheric temperature was about 1C warmer than a year ago (there was a trough a year ago and it's been high recently). What causes that kind of rapid global warming? Same thing that will cause the coming cooling: natural processes (mostly weather modulated by solar effects). The earth stays within a comfortable range because as the natural processes try to unbalance it, radiative and convective cooling balances it.
Unfortunately there is no such balance on the cool side.