Also on WaPo, but paywalled https://www.washingtonpost.com/weather/2019/12/10/arctic-may-have-crossed-key-threshold-emitting-billions-tons-carbon-into-air-long-

Also on WaPo, but paywalled https://www.washingtonpost.com/weather/2019/12/10/arctic-may-have-crossed-key-threshold-emitting-billions-tons-carbon-into-air-long-dreaded-climate-feedback/ https://www.washingtonpost.com/weather/2019/12/10/arctic-may...