use of ocean heat uptake — which amounts to only ~ 86 % of total heat uptake — as a measure of total heat uptake despite the observational studies Marvel et al. critique using estimates that included non-ocean heat uptake; (climateaudit.org)
So the contribution of this internal component to the heat uptake is, and the total heat uptake is (gfdl.noaa.gov)
The (slightly garbled) information in Section 3.2.5 of the SOD implies that 0 — 3000 m ocean warming accounts for 80 — 85 % of the Earth's total heat uptake, with the error standard deviation for the remainder of the order of 0.03 W / m ². (bishop-hill.net)