OHC
Ocean Heat Content
OHC is defined as the integrated temperature change times the density of sea water, times specific heat capacity from the surface down to the deep ocean. Estimates of it are made based on temperature measurements or on reanalyses made using a combination of models and observations.
From European Environment Agency Ocean heat content (CLIM 044) - Assessment
Estimates of changing ocean heat content by three groups (CSIRO, JMA-MRI, NOAA) are republished by the EPA.
All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. 941-954. Cambridge University Press.