Since 2018, a group of researchers from around the world has crunched the numbers on how much heat the world’s oceans are absorbing each year. In 2025, their measurements broke records once again, making this the eighth year in a row that the world’s oceans have absorbed more heat than in the years before.
The study, which was published Friday in the journal Advances in Atmospheric Science, found that the world’s oceans absorbed an additional 23 zettajoules’ worth of heat in 2025, the most in any year since modern measurements began in the 1960s. That’s significantly higher than the 16 additional zettajoules they absorbed in 2024. The research comes from a team of more than 50 scientists across the United States, Europe, and China.
A joule is a common way to measure energy. A single joule is a relatively small unit of measurement—it’s about enough to power a tiny lightbulb for a second, or slightly heat a gram of water. But a zettajoule is one sextillion joules; numerically, the 23 zettajoules the oceans absorbed this year can be written out as 23,000,000,000,000,000,000,000.
This is an important topic that highlights the ongoing changes in our oceans. It’s interesting to see how global research is coming together to address such a vital issue. Thank you for sharing these insights!
I completely agree! The rising ocean temperatures can have profound effects on marine ecosystems, including coral bleaching and shifts in fish populations. It’s crucial we pay attention to these changes and their broader impacts on climate and biodiversity.
Absolutely! It’s interesting to note that rising ocean temperatures can also influence weather patterns, potentially leading to more extreme storms. This interconnectedness highlights the urgency of addressing climate change.
You’re right! The connection between warmer oceans and altered weather patterns is crucial, especially since it can lead to more intense storms and changes in marine ecosystems. It’s a reminder of how interconnected our climate systems are.