Evan Bush is a science reporter for NBC News.
The Arctic just experienced its second-hottest year on record. And concerningly, the region’s tundra has transitioned from being a sink for carbon to a source of emissions as permafrost melts to release methane. That will only amplify the amount of heat-trapping gases that enter the atmosphere, paving the way for further warming.
“These issues are not not just staying in the Arctic, right — they’re impacting all of us,” said Brendan Rogers, an associate scientist at Woodwell Climate Research Center, in Woods Hole, Massachusetts, who studies permafrost and contributed to the report. This year’s report includes a detailed accounting of how the carbon cycle is changing in the Arctic. Scientists have been closely watching what happens when permafrost melts, releasing potent greenhouse gases as it thaws and decomposes.
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