Warming Arctic waters are emitting Carbon Dioxide, says NASA study

Once known to be Earth's critical carbon sinks, an increasingly warming Arctic Ocean is driving intense CO2 emissions, according to a study by NASA. It’s been estimated that the cold waters of the Arctic absorb as much as 180 million metric tonnes of carbon per year – more than three times what New York City emits annually. But, the study showed that thawing permafrost and carbon-rich runoff from Canada’s Mackenzie River trigger part of the Arctic Ocean to release more CO2 than it absorbs.