New York: The process of mountain erosion can be a source of new carbon dioxide gas that can release it back into the atmosphere far faster than it is being absorbed into newly exposed rock, a study has found.
The source of this extra CO2 is not entirely geological. Instead, it is the byproduct of tiny microbes in mountain soils that “eat” ancient sources of organic carbon that are trapped in the rock, researchers at Woods Hole Oceanographic Institution in the US said.
As the microbes metabolise these minerals, they spew out carbon dioxide, they said.
“This goes against a long-standing hypothesis that more mountains mean more erosion and weathering, which means an added reduction of CO2,” said Jordon Hemingway, a postdoctoral fellow at Harvard University.
“It turns out it is much more complicated than that,” said Hemingway, lead author of the research paper published in the journal Science.
The researchers came to this realisation after studying one of the most erosion-prone…