>I have revised the following two posts that are based on the NODC [Levitus et al (2009)] Ocean Heat Content data that’s available through the KNMI Climate Explorer.
KNMI corrected a problem in its NODC Ocean Heat Content data on October 1, 2009. The error grew in effect with the distance from the equator. It changed the scale of the variations and the trends but did not drastically change the overall shape of the curves. The problem, therefore, had no real impact on these posts, which illustrated the timing of ENSO-induced step changes in the OHC of numerous oceans and the effects of the NAO on high-latitude North Atlantic OHC. But to prevent a disagreement between the data presented in this post and future ones, I have updated the graphs in these posts and revised the text where appropriate.