I find the Lyman et al (2010) paper eurogreen cited and the included graph shown below to be particularly concerning. If this is a reasonable sample of the top 700 meters of the ocean it would seem something is likely happening. After all, the oceans are the biggest source of thermal inertia in the entire weather system and more ocean heat leads to greater energy in the atmospheric system. Is there any basis for making an argument that this sort of change is cyclical over a few decades or less?

And what about the rate of loss of Arctic sea ice:

From the discussion at the first link:

In this case, the match is not very good, and possibly getting worse, but unfortunately it appears that the models are not sensitive enough.

"It is not necessary to have hope in order to persevere."