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[–] Level_Cannon 0 points 1 point (+1|-0) ago 

I'm not sure which chart you looked at but the two sites you linked both show ocean temperature graphs that show a peak at 1960 with a downward trend throughout the decade with a rise near the end of that decade that is carried through 2010. The data seems to match up to me.

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[–] Vanwe ago 

Right here. This cyan bar graph is the 700m data isolated, ie what they are calling the top. The red line is the total heat found in the first 2000m. The black line would be the heat found below the top layer.

In all honesty its a weird graph, but its the only one I found.

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[–] Level_Cannon 0 points 1 point (+1|-0) ago 

I might be reading this wrong but aren't the cyan bars and blue line showing data coverage of the ocean at those two depths? The Y-axis for those two pieces of data are percentage, not temperature so I think that is showing either how much of the ocean they could measure in those years or maybe what percentage of the data comes from those depths at those years.