Underwater Oxygen Loss Threatens Earth's Stability, Researchers Warn
A new review led by Scripps Institution of Oceanography scientists warns that rapid loss of dissolved oxygen in oceans and freshwater systems is pushing Earth toward an unsafe state. The authors suggest that aquatic deoxygenation be added as a ninth planetary boundary to better capture its interactions with climate, biodiversity, and other Earth system processes. The paper highlights human-driven warming, nutrient pollution, and changes in water ventilation as primary drivers of this threat.
- ▪The review paper emphasizes that declining oxygen levels in aquatic ecosystems could have irreversible impacts on human timescales.
- ▪Researchers propose incorporating dissolved oxygen conditions into the existing Planetary Boundaries framework.
- ▪Aquatic deoxygenation is primarily driven by anthropogenic warming, excess nutrient runoff, and altered ventilation of interior waters.
- ▪Loss of oxygen disrupts biological and chemical processes that regulate climate and threatens a wide range of marine and freshwater species.
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| Original publisher | Scripps Institution of Oceanography |
| Canonical URL | https://scripps.ucsd.edu/news/underwater-oxygen-loss-threatens-earths-stability-researchers-warn |
| Publication time | Tue, 28 Jul 2026 22:31:14 +0000 |
| Retrieval time | 2026-07-28T22:51:00.352Z |
| Last seen | 2026-07-28T22:51:00.352Z |
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Oxygen bubbles beneath the ocean's surface. Credit: iStock/PlanctonVideo Jul 16, 2026 Underwater Oxygen Loss Threatens Earth’s Stability, Researchers Warn Scripps-led review calls for aquatic deoxygenation to be recognized as a critical planetary process under threat Author Brittany Hook Topics Climate Change Marine Life Oceanography Share A new review paper led by scientists at UC San Diego’s Scripps Institution of Oceanography warns that the rapid loss of oxygen from the ocean and other aquatic ecosystems is pushing Earth toward an “unsafe space,” with consequences that could be irreversible on human timescales.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Scripps Institution of Oceanography.
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