I don’t know the origin or back story for this graph.
I just saw it a few times in a discussion in this page at Tallbloke’s place:
And there, the discussion is about the red cycle blobs of seasonal warming, not about the overall trend. Yet when I look at it, the big feature I see is that the ocean is getting colder. The red seasonal heating is shrinking, year over year, and the deep dark blue is getting greater and colder year over year.
Where the name implies this is Argo data. I presume “59N” means from 59 degrees North.
So does anyone know if there is a “back story” to this about the Argo floats showing ocean cooling? Or is this a cherry pick of one slice?