Looks like some attempt to trivialize this thread.....
As I noted above, a big.... as in VERY LARGE..... issue in climate is the oceanic heat content. Most researchers look at sea surface temps. Sometimes, when trying to explain a super typhoon or something else way off the charts from "normal", there is some attribution to ocean temps in the top 100 meters. We have a little more data on that.... and it is discussed by professionals making long range projections of various natural "Oscillations" in weather patterns.
Here is what NOAA has to say about oceanic temperature profiles....
https://oceanservice.noaa.gov/facts/thermocline.html
As I noted earlier, at appreciable depths, the temp of oceans is generally near 4 C, the point at which water is normally at its greatest density.
That fact is, apparently, not exactly ironclad. NOAA says at greater depths the temp is even lower. I mention the tremendous pressures at these depths, and increasing deuterium replacing hydrogen in water molecules. Some filipino entrepreneurs are trying to finance a "heavy water" mine by pumping seawater from the Philippine Trench....30,000 feet deep.... to the surface because they say it's likely deuterium oxide, a valuable necessity for some nuclear and fusion projects, and of military importance. Other isotopes of other elements may also accumulate at great depth.
But the theory of a huge Planet Earth Thermostat involving ocean waters and ice caps in counterbalancing cycles is the topic I bring into this thread, to say that "Science"...… not "Religion" not "Statistm" not "Progressive Population Manipulations", aka "lies", is subject to contested theories and findings of fact.
I don't need to be a "Climate Denier" to say increased global temps, including oceanic heat increases, are a necessary event in bringing in an Ice Age, and any human contributions to that do not necessarily deny the possible eventual Ice Age.