A new Indian study finds rapid Himalayan erosion can significantly increase carbon dioxide release, revealing an overlooked geological process influencing global climate change.

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• Researchers from IISER Pune, Wadia Institute and IIT Roorkee studied how rapidly eroding Himalayan rocks influence atmospheric carbon dioxide levels.
• The study estimates carbon dioxide oxidation from rapidly weathering Himalayan minerals occurs at nearly three times the rate of silicate weathering uptake.
• India’s continued tectonic collision with the Eurasian plate drives intense Himalayan erosion, exposing fresh silicate minerals to atmospheric conditions.
• These newly exposed minerals chemically react with atmospheric carbon dioxide, creating complex effects on the region’s geological carbon cycle.
• Weathering processes can transport mineral products into oceans, where carbon may eventually become locked within seafloor sediments.
• The findings suggest Himalayan erosion may represent an important and previously underestimated source of carbon dioxide within Earth’s climate system.
• Researchers highlight that glacier destabilisation and accelerated erosion under a warming climate could alter natural carbon exchanges across Himalayan landscapes.
• The study provides new insight into how geological processes, mineral weathering and atmospheric carbon dioxide interact within rapidly changing mountain environments.
• The research challenges the assumption that silicate weathering in rapidly eroding mountain regions always produces a strong net carbon dioxide removal effect.
• Himalayan geological activity therefore deserves greater attention in climate research because erosion can simultaneously influence carbon dioxide release and long-term carbon storage.
• The findings connect mountain-building processes with modern climate change, showing that Earth’s geological systems can actively shape atmospheric carbon dioxide concentrations.
• Understanding these interactions could improve climate models by incorporating overlooked carbon sources associated with rapid erosion and mineral oxidation.