Science, Space and Technology News 2024
The upper solum shows a dark color because of the heavy accumulation of organic matter, while the lower solum is whitish due to the presence of calcium carbonate. The soil type is Calcic Molli-Ustic Cambosols according to Chinese Soil Taxonomy. Credit: Zhang Ganlin
The researchers found a whopping 2,305 billion tons of carbon stored as SIC in the top two meters of soil worldwide, which is more than five times the carbon found in all of the world’s vegetation combined. This hidden pool of soil carbon could be key to understanding how carbon moves around the globe.“But here’s the thing: This huge carbon pool is vulnerable to changes in the environment, especially soil acidification.
Disturbances to SIC accumulated over Earth’s history have a profound impact on soil health. This disruption compromises the soil’s ability to neutralize acidity, regulate nutrient levels, foster plant growth, and stabilize organic carbon. Essentially, SIC plays a critical dual role in storing carbon and supporting ecosystem functions that depend on it.The researchers revealed that approximately 1.13 billion tons of inorganic carbon are lost from soils to inland waters each year.
This study underscores the urgency of incorporating inorganic carbon into climate change mitigation strategies as an additional lever for maintaining and enhancing carbon sequestration. International programs such as the “4 per mille initiative,” which aims to increase SOC by 0.4% annually, should also consider the critical role of inorganic carbon in achieving sustainable soil management and climate mitigation goals.
France Dernières Nouvelles, France Actualités
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