Submarine Volcanoes and Atmospheric CO2: A Closer Look

The discussion on the role of submarine volcanoes in the rise of atmospheric CO2 levels presents an intriguing hypothesis. While some argue that these natural sources might contribute more significantly than previously acknowledged, the scientific consensus primarily attributes the increase to human activities, particularly fossil fuel combustion.

1. Steady Rise of CO2 Levels: The consistent upward trend in CO2 levels, as measured at Mauna Loa, correlates strongly with human emissions. This trend wouldn't align with sporadic volcanic activity, though continuous underwater releases could theoretically contribute.
2. Measurement Reliability: Despite concerns about the location of Mauna Loa near an active volcano, the data is considered reliable. The meticulous maintenance and consistent trends support its validity.
3. CO2 Residence and Adjustment Times: The short residence time (about four years) contrasts with the longer adjustment time (decades to centuries). This indicates that natural sources, even if significant, would take longer to impact equilibrium.
4. Ocean Buffering Effect: Oceans absorb CO2, but their capacity is limited and not instantaneous. This raises concerns about the ability to balance increased natural emissions.
5. Scientific Consensus: Peer-reviewed research and established methodologies underscore human activities as the primary driver. The isotopic composition of CO2 and circulation patterns further support this conclusion.
6. Skepticism and Transparency: While questioning assumptions is valid, relying on scientific evidence is crucial. The consensus emphasizes human responsibility in climate change. In conclusion, while submarine volcanoes may play a role, human activities remain the dominant factor in the rise of atmospheric CO2. Further research into natural sources is warranted, but existing evidence strongly supports the anthropogenic impact.

Published: 5/22/2025