The hole in the Earth’s ozone layer that forms over Antarctica each September grew to about 8.9 million square miles in 2016 before starting to recover, according to scientists from NASA and the National Oceanic and Atmospheric Administration (NOAA) who monitor the annual phenomenon. “This year we saw an ozone hole that was just […]
U.S. Geological Survey topographic maps give you a choice on the height of Mount Isto. Depending on what map scale you choose, the mountain in the Brooks Range is either higher or lower than 9,000 feet. Using a new combination of techniques, an Alaska researcher has crowned Mt. Isto the highest peak in America’s arctic, […]
Sea ice in summer looks dramatically different than sea ice in winter, even in the polar Arctic. Summer snowmelt, pools of water on thinning ice and exposed ocean replace vast winter expanses of white snow-covered ice – and this weekend NASA’s high-flying laser altimeter begins a campaign to investigate these features. Icy areas look […]