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Uncovering Lake Vostok, Hidden Under 2 Miles of Antarctic Ice

This panoramic photo of Vostok Station shows the layout of the camp, used by Russian, French and American scientists studying the lake and the deep coring possibilities of the Antarctic. NOAA/Getty Images 53 million years ago, Antarctica was a forested wilderness, a lush environment where palm trees took root. Now, more than 97 percent of the world s southernmost continent is covered by ice. The magnificent ice sheet that blankets Antarctica holds 6.4 million cubic miles (27 million cubic kilometers) of frozen water. From top to bottom, it s over 2.2 miles (3.5 kilometers) thick in some places. Our global sea level would rise by 190 feet (58 meters) if all that ice melted. As things presently stand, the frigid sheet conceals a hidden world.

What s the Coldest Place on Earth?

We all know the type. Certain people treat every conversation about bad or extreme weather like it s some kind of contest. Maybe their hometown is snowier than yours. Maybe they ve lived through more blizzards. In any case, these charming folks can t resist a little meteorological one-upmanship. Shallow depressions in a high-elevation part of the East Antarctic Plateau have the capacity to become the coldest places on the face of the Earth during their polar winter. Eli Duke/Flickr (CC BY-SA 2.0) We all know the type. Certain people treat every conversation about bad or extreme weather like it s some kind of contest. Maybe their hometown is snowier than yours. Maybe they ve lived through more blizzards. In any case, these charming folks can t resist a little meteorological one-upmanship.

Dynamic flows create potentially habitable conditions in Antarctic subglacial lakes

Trapped beneath the Antarctic ice sheet lie over 400 subglacial lakes, which are considered to be extreme, isolated, yet viable habitats for microbial life. The physical conditions within subglacial lakes are critical to evaluating how and where life may best exist. Here, we propose that Earth’s geothermal flux provides efficient stirring of Antarctic subglacial lake water. We demonstrate that most lakes are in a regime of vigorous turbulent vertical convection, enabling suspension of spherical particulates with diameters up to 36 micrometers. Thus, dynamic conditions support efficient mixing of nutrient- and oxygen-enriched meltwater derived from the overlying ice, which is essential for biome support within the water column. We caution that accreted ice analysis cannot always be used as a proxy for water sampling of lakes beneath a thin (<3.166 kilometers) ice cover, because a stable layer isolates the well-mixed bulk water from the ice-water interface where freezing may occur.

Perforan el hielo cuatro mil metros para llegar al lago Vostok

Perforan el hielo cuatro mil metros para llegar al lago Vostok
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Antarctica bombshell: Never-before-seen footage uncovered Cold War mission beneath ice | Science | News

| UPDATED: 08:38, Fri, Jan 29, 2021 Link copied Sign up for FREE for the biggest new releases, reviews and tech hacks SUBSCRIBE Invalid email When you subscribe we will use the information you provide to send you these newsletters. Sometimes they ll include recommendations for other related newsletters or services we offer. Our Privacy Notice explains more about how we use your data, and your rights. You can unsubscribe at any time. The southernmost continent is home to around 1,000 researchers every year, who monitor climate change and study Earth’s history. After World War 2 this barren landscape risked becoming another battleground as tensions soared between the US and the Soviet Union, but these ambitions were crushed thanks to the Antarctic Treaty System. The global pact, signed 60 years ago, is dedicated to preserving and protecting the continent for scientific research and provides a safeguard against nuclear proliferation.

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