“It’s not like we’re breaking records by a little bit now and then,” Brian McNoldy, a hurricane researcher at the University of Miami, said. “It’s like the whole climate just fast-forwarded by fifty or a hundred years. That’s how strange this looks.” It’s estimated that in 2023 the heat content in the upper two thousand metres of the oceans increased by at least nine zettajoules. For comparison’s sake, the world’s annual energy consumption amounts to about 0.6 zettajoules.
https://www.newyorker.com/news/daily-comment/why-is-the-sea-so-hot