You seem to have a reading comprehension issue. From the abstract of Balmaseda, Trenberth and Kallen's "Distinctive climate signals in reanalysis of global ocean heat content":
"The warming below 700 m remains even when the Argo observing system is withdrawn although the trends are reduced."
The Argo data shows greater deep warming than the non-Argo data.
I find it funny as all get-out that you think you know "how science works" better than the three PhDs who wrote this paper and the several more PhDs that reviewed it for publication. When was the last time you were in the field, dude? And how far offshore was that?
Without the armada of Argo floats -- what you're left with is not much better than the historical data. And the MODERN portion of the data probably departs DRASTICALLY with the earlier data..
How you gonna make a general like that one --- CLAIMING TO BE COVERING THE GLOBE --- with not enough data?
Seems to me --- they ought to concentrate on the MAJOR sub-surface TRANSPORT streams and do a GOOD JOB OF THAT FIRST.. Because that's the big Cuisinart Mixer that moves the heat around..
The fact that went for a GLOBAL number just to make a PUBLIC EXCUSE for the lack of atmospheric warming --- is just more media centered science..
A GLOBAL average at 700m is elusive and meaningless...