E
estesbob
Guest
Seems they only have 9 years of data to examineOcean warming greatly underestimated:
skepticalscience.com/Ocean-Warming-has-been-Greatly-Underestimated.html
I suggest you read the whole article.
Prior to 2005, when the Argo global array of submersible floats became operational, ocean temperature was much more sparsely sampled, especially in the southern hemisphere, leading to larger uncertainty over the evolution of ocean warming through time.*