All star team of climate experts has a new evaluation of ocean heat. One of the authors, Michael Mann, notified on X, above.
Global ocean warming continued unabated in 2025 in response to increased greenhouse gas concentrations and recent reductions in sulfate aerosols, reflecting the long-term accumulation of heat within the climate system, with conditions evolving toward La Niña during the year. In 2025, global upper 2000 m ocean heat content (OHC) increased by ∼23 ± 8 ZJ relative to 2024 according to IAP/CAS estimates. CIGAR-RT, and Copernicus Marine data confirm the continued ocean heat gain. Regionally, about 33% of the global ocean area ranked among its historical (1958–2025) top three warmest conditions, while about 57% fell within the top five, including the tropical and South Atlantic Ocean, Mediterranean Sea, North Indian Ocean, and Southern Oceans, underscoring the broad ocean warming across basins.
Another author on the same study, well known to readers here, Zeke Hausfather, posted more on this.
Zeke had an entertaining exchange with climate denier Steve Milloy, who predictably tried to fog the message. Zeke pointed out that measurements of ocean heat are some of the most accurate we have, due to the thousands of ocean going “Argo Floats” that record and transmit temperature and other data in real time.
I notice that more than two dozen of the 55 contributors to the linked paper had Chinese names. I wonder how much support the Chinese government gives to climate research.
https://link.springer.com/article/10.1007/s00376-026-5876-0
having interviewed Lijing Cheng, I gather that China has a pretty robust meteorological and climatic effort, especially given the vulnerability they have to extreme events.