The Guardian 01-02-2022
https://www.theguardian.com/environment/2022/feb/01/extreme-heat-oceans-passed-point-of-no-return-high-temperatures-wildlife-seas
(..) The scientists then examined temperature records from 1920 to 2019, the most recent year available. They found that by 2014, more than 50% of the monthly records across the entire ocean had surpassed the once-in-50–years extreme heat benchmark. The researchers called the year when the percentage passed 50% and did not fall back below it in subsequent years the “point of no return”. (..)