# Earth atmospheric oxygen depletion research > Live situation record from CLSTR: https://clstr.news/situations/earth-atmospheric-oxygen-depletion-research > Updated: 2026-09-29T11:07:09.000Z. Sources: 5. Developments: 2. Scientific research is increasingly focused on the history and projected depletion of Earth’s atmospheric oxygen. Initial computational models suggest that the loss of a breathable atmosphere may occur sooner than previously anticipated, citing various potential drivers such as climate change, increased carbon dioxide, or asteroid impacts. Subsequent studies have provided more granular detail regarding the mechanisms of oxygen stability. Research published in Nature Communications indicates that ancient ocean chemistry, specifically a cycle involving phosphorus and sulfate, was essential for sustaining oxygen levels following the ‘Great Oxidation Event’ approximately 2.3 to 2.5 billion years ago. Further supercomputer modeling from NASA and other institutions suggests that the long-term stability of oxygen-based biosignatures is ultimately tied to solar evolution. These models project that in approximately 1 billion years, the expansion of the Sun will increase solar heat, reducing oxygen levels and rendering the planet uninhabitable. ## Timeline ### 2026-09-29: Scientific models examine the history and future of Earth's atmospheric oxygen Scientific studies using biogeochemistry and climate modeling reveal how ancient ocean chemistry sustained Earth's oxygen and predict the atmosphere's eventual decline in roughly 1 billion years. 2 sources. https://clstr.news/cluster/scientific-models-examine-the-history-and-future-of-earths-atmospheric-oxygen ### 2026-09-19: Earth oxygen depletion predicted sooner than expected by scientists Scientists using computational models suggest Earth may lose its oxygen-rich atmosphere sooner than previously anticipated, potentially impacting the planet's habitability. 3 sources. https://clstr.news/cluster/earth-oxygen-depletion-predicted-sooner-than-expected-by-scientists --- Cite as: Earth atmospheric oxygen depletion research. CLSTR, https://clstr.news/situations/earth-atmospheric-oxygen-depletion-research