> There is no good reason to think that they have, and this study does not at all contravene, or even call into question, the consensus on the causes of warming.

From the article:

> “Climate simulations generally do not reproduce this kind of warming in the Arctic Ocean, meaning there’s an incomplete understanding of the mechanisms driving Atlantification,” said Tommaso. “We rely on these simulations to project future climate change, but the lack of any signs of an early warming in the Arctic Ocean is a missing piece of the puzzle.”

I'd generally encourage people to be skeptical of everything, but I'd call this a really good reason to be skeptical.