Washington, April 8 ANI | 7 months ago

Researchers have found new evidence that permafrost thawing is releasing large quantities of greenhouse gases into the atmosphere via plants, which could accelerate warming trends.


Suzanne Hodgkins, the lead author on the paper and a doctoral student in chemical oceanography at Florida State, said they've known for a while now that permafrost is thawing, asserting what they've found is that the associated changes in plant community composition in the polar regions could lead to way more carbon being released into the atmosphere as methane.

Permafrost is soil that is frozen year round and is typically located in polar regions. As the world has gotten slightly warmer, that permafrost is thawing and decomposing, which is producing increased amounts of methane.

Relative to carbon dioxide, methane has a disproportionately large global warming potential. Methane is 33 times more effective at warming the Earth on a mass basis and a century time scale relative to carbon dioxide.

As the plants break down, they are releasing carbon into the atmosphere. And if the permafrost melts entirely, there would be five times the amount of carbon in the atmosphere than there is now, said Jeff Chanton, the John Widmer Winchester Professor of Oceanography at Florida State.

The research has been published in the Proceedings of the National Academy of Sciences.

(Posted on 08-04-2014)

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