Researchers have found a link between gravity waves in the upper and lower Antarctic atmosphere, helping create a clearer picture of global air circulation.
Tiny valleys near the top of Antarctica’s ice sheet reach temperatures of nearly minus 100 degrees Celsius, according to new research from the National Snow and Ice Data Center.
Three major "switches" affecting wildfire—fuel, aridity, and ignition—were either flipped on and/or kept on longer than expected last year, triggering one of the largest and costliest U.S. wildfire seasons in recent decades.