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Earth’s Ocean Heat Content
January 17 , 2026
4 hrs 0 min
20
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- Earth’s ocean heat content (OHC) has set a new record in 2025 by absorbing an additional ~23 zettajoules (ZJ) of heat.
- It marking the ninth consecutive year of record-breaking warmth.
- Oceans absorbed nearly 90% of excess heat trapped by greenhouse gases, with global average sea surface temperatures ~0.5°C above the 1981–2010 average.
- Impacts include increased ocean stratification, marine heat waves, intense storms, coral bleaching, and threats to marine life and ocean productivity.
- The study highlights the oceans as the primary buffer of global warming and the urgent need for climate mitigation measures.
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