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Tag Archives: Antarctic

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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The rare warming of the Antarctic shows the power of stratospheric models

The warming of the stratosphere above the South Pole will affect the weather in the southern hemisphere for several months. Credit: John Sonntag / Planet Pix about Zuma Wire / Shutterstock For the past month, a rare atmospheric phenomenon has been brewing over the Antarctic, raising the upper atmosphere's temperature by 40 degrees, threatening the direction of a reverse Only …

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Antarctic glaciers slip faster towards the ocean due to surface melting

The surface meltwater flowing through the ice and under the Antarctic glaciers leads to new research on sudden and rapid accelerations of the flow towards the sea. It is the first time that scientists have discovered that melting on the surface affects the flow of Antarctic glaciers. A study shows for the first time a direct correlation between surface smelting …

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Antarctic shock: Scientists discover clues to "human invaders" under the ice | Science | news

The Antarctica Expedition embarked on a 50-day journey across the Southern Ocean and beyond the icy continent earlier this year. On board the New Zealand research vessel RV Tangaroa, an international team scanned the seabed with state-of-the-art technology. With the Aegis imaging system, scientists were able to capture fascinating images that have never been seen before. The documentary "The Secrets …

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Wind shifts caused by man-made global warming are causing the melting ice of the West Antarctic

August 16 (UPI) – According to a new study, man-made climate change triggered wind shifts in the Antarctic that accelerated the accelerated melting on the west coast of the continent. The study was published this week in Nature magazine Earth Sciences – the first direct link between man-made global warming and the fast-melting glaciers of the West Antarctic. Scientists have …

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