NASA warns Artctic thaw could have huge impact on global warming


The Arctic’s permafrost soils has NASA worried. Scientists monitoring carbon levels in the top layers of Arctic soils have identified huge deposits that, if thawed sufficiently, could upset the continent’s carbon balance and magnify the impacts of global warming. The agency estimates that the Arctic’s permafrost soils store as much as 1,850 petagrams (one petagram equals 1 billion metric tons), comprising around half of all the carbon stored in Earth’s soils — most of it lying within 3 meters of the surface.

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