"Emissions from thawing permafrost are now outpacing the uptake of carbon dioxide during the growing season, a new study suggests".
"Soaring temperatures in the Arctic have triggered a huge seasonal surge in carbon dioxide emissions from thawing permafrost and may be tipping the region toward becoming a net source of heat-trapping greenhouse gases, a new study shows.
Even into early winter, when the ground would have been frozen 40 years ago, microbes in the permafrost are continuing to release heat-trapping greenhouse gases. Carbon dioxide emissions are now outpacing the uptake of CO2 during the spring and summer growing season, the study suggests.
The study's authors, researchers from Harvard, the National Oceanic and Atmospheric Administration and other institutions, measured atmospheric CO2 in Alaska and found that emissions from October through December have increased by 73 percent since 1975 and that the increase correlates with rising summer temperatures."