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Tag Archives: ice

Discovery of Water on the Moon: Astronomers Peek New Ice in the Southern Pole of the Moon | Science | news

Water on the Moon is found around the South Pole, where deep impact craters are wrapped in permanent darkness. Until recently, astronomers believed that water was left behind by aquatic comets and volcanic activity billions of years ago. However, satellite data collected by NASA has revealed younger-looking ice deposits in smaller craters. The "surprising" discovery suggests that there are unknown …

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New research suggests that the global ice age has changed the face of the planet

Credit: NASA Curtin University researchers have discovered that a global ice age more than 600 million years ago dramatically changed the planet's face, leaving a barren, flooded landscape and clear oceans. The study published in Terra Nova investigated how distinct carbonate sedimentary rocks formed over millions of years after the snowball earth. The sedimentary rocks resemble the limestone of tropical …

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Upturned "rivers" melt Antarctic ice shelves from below

Antarctic ice shelves are destabilized by hidden upside-down rivers of warm water that flow below the ice shafts and melt them from below. Scientists have known of these basal channels in ice floe for several years, but the circumstances behind their formation were not well understood. Now we've learned more about the phenomenon and scientists say it needs to be …

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Upturned "Rivers" of Warm Seawater Attack Antarctic Ice Shelfs [Video]

Satellite images show Polynyas (open water regions) located at the ends of the basal channels below the shear ridges of the East Getz Ice Shelf form . A new study in Science Advances highlights how warm seawater and ice dynamics weaken the edges of Antarctic ice shelves, making them more prone to breakup. Credit: Karen Alley / The College of …

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How to melt Antarctic ice sheets from above and below

The frozen mountains and icy plains of Antarctica hold enough water to raise global sea levels to nearly 200 feet. Fortunately, more than three-quarters of the continent is surrounded by ice shelves, the floating glacier foothills that protect the ice behind them like walls surrounding a huge, icy castle. But scientists are discovering new vulnerabilities that could weaken these walls …

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