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Frozen Arctic soils hold vast stores of carbon that may exacerbate global warming. A NASA Arctic campaign is looking for signals that may hold a key to Earth's climate future.
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Ultimately, the scientists hope their observations will indicate whether an irreversible permafrost tipping point may be near at hand. While scientists don't yet believe the Arctic has reached that tipping point, no one knows for sure. "We hope CARVE may be able to find that 'smoking gun,' if one exists," Miller said.
The more it melts, the worse it gets...