Seafloor Weathering and Outgassing Have Limited Impact on Earth's Biosphere Lifespan
Published:Dec 31, 2025 00:51
•1 min read
•ArXiv
Analysis
This paper investigates the factors that could shorten the lifespan of Earth's terrestrial biosphere, focusing on seafloor weathering and stochastic outgassing. It builds upon previous research that estimated a lifespan of ~1.6-1.86 billion years. The study's significance lies in its exploration of these specific processes and their potential to alter the projected lifespan, providing insights into the long-term habitability of Earth and potentially other exoplanets. The paper highlights the importance of further research on seafloor weathering.
Key Takeaways
- •Seafloor weathering and stochastic outgassing are unlikely to significantly shorten the lifespan of Earth's terrestrial biosphere.
- •A lifespan of over 1 billion years remains likely, even considering these factors.
- •Seafloor weathering is identified as a key process requiring further study.
Reference
“If seafloor weathering has a stronger feedback than continental weathering and accounts for a large portion of global silicate weathering, then the remaining lifespan of the terrestrial biosphere can be shortened, but a lifespan of more than 1 billion yr (Gyr) remains likely.”