
Extreme Climatic Events Transform Over 7,500 Greenland Lakes from Carbon Sinks to Sources
Over 7,500 lakes in western Greenland have undergone a significant ecological transformation due to extreme climatic conditions. Atmospheric rivers (ARs) have turned these lakes from carbon sinks into carbon sources, a new study published in the Proceedings of the National Academy of Sciences (PNAS) has revealed.
In September 2022, record heat and heavy rains driven by ARs altered the physical, biological, and biogeochemical characteristics of these lakes. ARs, often referred to as “rivers in the sky,” are narrow regions in the atmosphere that transport water vapor outside tropical areas, as defined by the National Oceanic and Atmospheric Administration (NOAA).
The influx of rainfall instead of snow, alongside remnants of Hurricane Fiona, caused unprecedented melting of the Greenland...