Ocean heat content (OHC)

The oceans, due to their large heat capacity, have absorbed more than 90% of the heat gained by the earth.

Global reconstruction of historical ocean heat storage and transport
Zanna et al.
Since the 19th century, rising greenhouse gas concentrations have caused the ocean to absorb most of the Earth’s excess heat and warm up. Before the 1990s, most ocean temperature measurements were above 700 m and therefore, insufficient for an accurate global estimate of ocean warming. We present a method to reconstruct ocean temperature changes with global, full-depth ocean coverage, revealing warming of 436 ×10^21 J since 1871. Our reconstruction, which agrees with other estimates for the well-observed period, demonstrates that the ocean absorbed as much heat during 1921–1946 as during 1990–2015. Since the 1950s, up to one-half of excess heat in the Atlantic Ocean at midlatitudes has come from other regions via circulation-related changes in heat transport.


Where is some information on Ocean temperatures from NASA: In Brief:
Ninety percent of global warming is occurring in the ocean, with the last decade and the year 2021 being the hottest…



Where is some information on Ocean temperatures from NASA…

The NOAA graph of OHC for 0-2000m back to 1960 is similar to Figure 1b in the Zanna paper. The new paper extends the estimates in both depth and time. What is surprising (at least to me) is the part I bolded:

“…the ocean absorbed as much heat during 1921-1946 as during 1990-2015.”

Not an intuitive result.