It doesn't. This model isn't an alternative to CO2 based atmospheric warming models, it just explains a very recent trend in ocean temperature. This branched off a discussion about recent temperature trends. Everyone asking questions about general long term trends either aren't reading or are starting a different conversation.

GP explicitly referenced this phenomenon in an unqualified manner when addressing ocean warming. If they wanted to be understood the first time, they should have clarified the context.

If you check, the GP said "the recent unexplained warming". That's sufficient qualification to say that this is the explanation.

Of course the sudden recent spike is on top of an existing warming trend. And that trends is due to long-term trends from CO2.

"recent" is enough of a weasel word that context is still needed.