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Keyword: antarctica

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  • NASA's Undersea Robot Crawls Beneath Antarctic Ice in Test for Icy Moons

    11/20/2019 11:14:38 AM PST · by BenLurkin · 10 replies ^ | 11/20/2019 | By Meghan Bartels
    NASA engineers are already working on an underwater rover they hope could one day tackle the challenges posed by ocean worlds like Jupiter's moon Europa and Saturn's moon Enceladus. A team has been working on such a robot, called Buoyant Rover for Under-Ice Exploration or BRUIE, for a few years now. NASA is taking a prototype of that rover to Antarctica for testing in the most similar environment to those moons found on Earth. The tests will take place at Australia's Casey research station along the coast of Antarctica far south of Australia, where BRUIE will spend a month exploring...
  • Explosion in Antarctic sea ice levels may cause another ice age

    10/30/2019 3:15:38 PM PDT · by Innovative · 51 replies
    Fox News ^ | Oct.30, 2019 | Chris Ciaccia
    Upside-down "rivers" of warm ocean water may be one of the causes of Antarctica's ice shelves breaking up, leading to a rise in sea levels. But a new study suggests an increase in sea ice in a colder climate may lead to a much more devastating change in the Earth's climate — another ice age. Using computer simulations, the research suggests that an increase in sea ice could significantly alter the circulation of the ocean, ultimately leading to a reverse greenhouse effect as carbon dioxide levels in the ocean increase and levels in the air decrease. “One key question in...
  • South Pole’s ozone hole shrinks to smallest since discovery

    10/27/2019 2:44:06 PM PDT · by 11th_VA · 44 replies
    Business Mirror ^ | Oct 28, 2019
    WASHINGTON—The ozone hole near the South Pole this year is the smallest since it was discovered, but it is more due to freakish Antarctic weather than efforts to cut down on pollution, National Aeronautics and Space Administration (Nasa) reported. This fall, the average hole in Earth’s protective ozone layer is 3.6 million square miles (9.3 million square kilometers). That’s down from a peak of 10.3 million square miles (26.6 million square kilometers) in 2006. This year’s hole is even smaller than the one first discovered in 1985. “That’s really good news,” Nasa scientist Paul Newman said Tuesday. “That means more...
  • Ozone hole is the smallest on record due to 'rare event,' NASA says

    10/21/2019 12:33:00 PM PDT · by AT7Saluki · 38 replies
    Fox News ^ | 10/21/19 | Chris Ciaccia
    Unusual weather patterns in the upper atmosphere over Antarctica have caused a drastic reduction in ozone depletion, leaving the ozone with the smallest hole seen since its discovery in 1982, according to NASA and the National Oceanic and Atmospheric Administration. The government agencies said that the hole had shrunk to 3.9 million square miles for the remainder of September and October, according to satellite data. The peak in the hole was 6.3 million square miles, observed on Sept. 8. During normal weather conditions, the hole is usually around 8 million square miles during this time of year.
  • 315 billion-tonne iceberg breaks off Antarctica

    10/01/2019 4:21:12 PM PDT · by RightGeek · 111 replies
    BBC ^ | 9/30/2019 | Jonathan Amos
    The Amery Ice Shelf in Antarctica has just produced its biggest iceberg in more than 50 years. The calved block covers 1,636 sq km in area - a little smaller than Scotland's Isle of Skye - and is called D28. The scale of the berg means it will have to be monitored and tracked because it could in future pose a hazard to shipping. Not since the early 1960s has Amery calved a bigger iceberg. That was a whopping 9,000 sq km in area. ...The Scripps researcher stressed that there was no link between this event and climate change. Satellite...
  • Most Recent Reversal of Earth’s Magnetic Field Lasted 22,000 Years

    08/08/2019 2:00:05 PM PDT · by BenLurkin · 20 replies ^ | 08/08/2019
    The researchers combined magnetic readings and radioisotope dating of samples from seven lava flow sequences to recreate the magnetic field over a span of about 70,000 years centered on the latest geomagnetic reversal. They accurately dated the lava flows by measuring the argon produced from radioactive decay of potassium in the rocks. They found that the final reversal was quick by geological standards, less than 4,000 years. But it was preceded by an extended period of instability that included two excursions — temporary, partial reversals — stretching back another 18,000 years. The lava flow data was corroborated by magnetic readings...
  • Flat-Earthers' Cruise Will Sail to Antarctica 'Ice Wall' at the Planet's Edge. Right.

    06/19/2019 11:08:33 AM PDT · by Gamecock · 175 replies
    Live Science ^ | 3/22/2019
    Organizers of an annual conference that brings together people who believe that the Earth is flat are planning a cruise to the purported edge of the planet. They're looking for the ice wall that holds back the oceans. The journey will take place in 2020, the Flat Earth International Conference (FEIC) recently announced on its website. The goal? To test so-called flat-Earthers' assertion that Earth is a flattened disk surrounded at its edge by a towering wall of ice. Believers in a flat Earth argue that images showing a curved horizon are fake and that photos of a round Earth...
  • Seals with antennas on their heads helped scientists solve an Antarctic mystery

    06/11/2019 9:17:23 AM PDT · by BenLurkin · 19 replies
    CNN ^ | June 11, 2019 | AJ Willingham,
    In 2016 and 2017, a hole of open water, called a polynya, appeared in the winter ice of the Weddell Sea in Antarctica. It eventually grew to about 19,000 square miles; roughly twice the size of Vermont. Though polynyas are not unusual, this large and frequent of a hole was a great opportunity for scientists to figure out why, exactly, these holes were appearing. A team from the University of Washington explored the hole with a combination of robots, radio equipment and seals with antennas stuck to their heads. The team found that, in order for a polynya to occur,...
  • Ancient rocky structure found beneath Antarctica. And it's messing with the ice

    05/30/2019 9:30:41 AM PDT · by ETL · 26 replies ^ | May 30, 2019 | Stephanie Pappas Live Science Contributor | LiveScience
    The structure is an old tectonic boundary, probably formed during the birth of the Antarctic continent or shortly thereafter. According to new research published May 27 [2019] in the journal Nature Geoscience, this boundary protects the ice shelf's grounding line, the point at which it is thick enough to extend all the way to the sea floor. The geology created by the boundary keeps warm, melt-promoting ocean water away from that part of the shelf. But the ocean circulation driven by that same geology drives intense summer melt along the shelf's easterly edge. "We could see that the geological boundary...
  • Amazon River Up To 11 Million Years Old, Says Study

    07/08/2009 12:55:12 PM PDT · by decimon · 40 replies · 862+ views
    Scientific Blogging ^ | July 7th 2009 | News Staff
    Sediment column at the mouth of the Amazon River. Credit: NASA The Amazon River has been around for 11 million years ago and in its shape for the last 2.4 million years ago, according to a study on two boreholes drilled in proximity of the mouth of the Amazon River by Petrobras, the national oil company of Brazil. Until recently the Amazon Fan, a sediment column of around 10 kilometres in thickness, proved a hard nut to crack, and scientific drilling expeditions such as Ocean Drilling Program could only reach a fraction of it. Recent exploration efforts by Petrobras lifted...
  • New study refutes climate-change alarm

    04/12/2019 8:11:14 AM PDT · by rktman · 29 replies ^ | 4/12/2019 | Unknown
    Scientists who promote the theory of anthropogenic climate change contend a rise in the level of carbon dioxide in the atmosphere due to human activity is causing catastrophic warming. But a new scientific study finds that the current CO2 levels of 410 parts per million were last seen on Earth 3 million years ago, points out Breitbart Editor-at-Large John Nolte. Researchers at the Potsdam Institute for Climate Impact Research published their findings in the journal Science Advances. The study also found that during this time of global warming, long before the Industrial Age, “there were no ice sheets covering either...
  • After a 6-Year Running Break, This Fitness Entrepreneur Took on the Antarctica Marathon

    04/02/2019 6:13:24 AM PDT · by Tolerance Sucks Rocks · 5 replies
    Runner's World ^ | March 30, 2019 | Paige Triola
    After a six-year hiatus from running, Anne Mahlum got back into it big time, finishing up her goal of completing a marathon on every continent. Her last remaining one? Antarctica. She crossed that off her list on March 17, and she did it for a good cause: She ended up raising $102,927 for the New York City chapter of Back on My Feet, a nonprofit she had founded in 2007 that uses​ running and community to empower people experiencing homelessness. While Mahlum hadn’t laced up in six years, she wasn’t inactive. She had been busy growing her boutique fitness company...
  • A potential fallacy in ice core studies?

    08/05/2008 2:08:35 AM PDT · by y2gordo · 14 replies · 121+ views
    A thought about ice cores just occurred to me, and I need someone in the know to verify or refute this argument. Scientists claim to know what the temperature was in past years primarily by drilling ice core samples. They measure levels of specific gasses, like carbon dioxide, that are trapped within the layers of the ice, and somehow they calculate the temperature for that time based off of "certain assumptions" (none of which are mentioned in the wikipedia article). That is rather dubious inandof itself, but I want to take that thought in a different direction. We all know...
  • Ancient microbes yield clues to ice age timing

    03/09/2019 12:38:24 PM PST · by BenLurkin · 23 replies
    Cosmos Magazine ^ | 08 March 2019
    For several million years, the Earth cycled through ice ages at a regular pace, but then, 1.25 million to 700,000 years ago, something changed: ice ages went from lasting 40,000 years to 100,000. … By looking at the microscopic shells of microorganisms called foraminifera, Adam Hasenfratz of the Geological Institute in Zürich, Switzerland, and colleagues, find evidence of a reduction in deep water circulation, causing less carbon dioxide to be released into the air. Oceanic changes in the Antarctic Zone could have ensured “that glacial conditions persisted despite orbital changes to the contrary”, the study says. The new research, presented...
  • Mysterious new orca species likely identified (plus video)

    03/08/2019 4:07:49 AM PST · by blueplum · 32 replies
    National Geographic ^ | 07 Mar 2019 | Douglas Main
    At the bottom of the world, in some of the roughest seas, live mysterious killer whales that look very different from other orcas. Now, for the first time, scientists have located and studied these animals in the wild. The orcas are “highly likely” to be a new species, says Robert Pitman, a researcher with the National Oceanic and Atmospheric Administration. The scientific team made the finding in January about 60 miles off the coast of Cape Horn, Chile..
  • Why are some icebergs green in Antarctica? Researchers think they've solved century-old mystery

    03/05/2019 4:46:28 PM PST · by EdnaMode · 33 replies
    Fox News ^ | March 5, 2019 | Jennifer Earl
    The stunning sight of emerald green-colored icebergs in Antarctica has been documented for more than a century — in literature and beyond. For decades, scientists have argued about the cause behind the bizarre phenomenon and debated why the green-hued ice chunks aren't the typical blue or white color. But a recent discovery from a 2016 research trip to East Antarctica’s Amery Ice Shelf may provide the final clue they've been waiting for. In a new study published in the Journal of Geophysical Research: Oceans, researchers found marine ice varies in color due to the "abundance of foreign constituents in the...
  • Endurance: Search for Shackleton's lost ship begins

    02/10/2019 7:03:49 PM PST · by DUMBGRUNT · 46 replies
    BBC ^ | 10 Feb 2019 | Jonathan Amos
    The team broke through thick pack ice on Sunday to reach the vessel's last known position in the Weddell Sea. Robotic submersibles will now spend the next few days scouring the ocean floor for the maritime icon. Shackleton and his crew had to abandon Endurance in 1915 when it was crushed by sea ice and sank in 3,000m of water. Shackleton's skipper, Frank Worsely, was a very skilled navigator and used a sextant and chronometer to calculate the precise co-ordinates of the Endurance sinking - 68°39'30.0" South and 52°26'30.0" West.
  • Scientists Have Reduced the Forecast of Sea Level Rise Seven Times Due to Melting of the Antarctic

    02/10/2019 3:07:18 PM PST · by Textide · 34 replies
    The Maritime Herald ^ | February 8, 2019 | SVILEN PETROV
    The destruction of the Antarctic ice sheet may not lead to such a catastrophic rise in the level of the oceans, as previously thought. In a new study, the authors calculated that instead of growing by a meter or more by 2100, a growth of 14-15 cm is likely, writes N + 1. At the same time, the melting of the ice of Greenland and Antarctica is not fully taken into account in modern climate models, as it will lead to even more destabilization of the regional climate. Both studies on this are published in the journal Nature. The melting...

    02/07/2019 8:46:24 AM PST · by Sean_Anthony · 10 replies
    Canada Free Press ^ | 02/07/19 | Dr.John Happs
    It would appear then that slightly increasing concentrations of atmospheric carbon dioxide and temperature stasis over 20 years have done absolutely nothing to threaten the Penguins In 2008, historian Meredith Hooper published her book: “The Ferocious Summer. Adélie Penguins and the warming of Antarctica.” (Greystone Books, Vancouver, British Columbia.) We are told that “This book is a fascinating and alarming report from the frontlines of global warming” and not surprisingly we find the following message on the book’s front cover from serial alarmist Dr. David Suzuki: “Like canaries in a coal mine, penguins present an undeniable and urgent warning of...
  • "Disturbing" discovery: Giant hole found under Antarctica glacier

    01/31/2019 3:59:17 PM PST · by EdnaMode · 143 replies
    CBS News ^ | January 31, 2019 | Sarah Lynch Baldwin
    Researchers say a massive cavity the size of two-thirds of Manhattan was found under a glacier in Antarctica. The pocket is a sign of "rapid decay" and just one of "several disturbing discoveries" made recently regarding the glacier, NASA's Jet Propulsion Laboratory said in a news release Wednesday. "[The size of] a cavity under a glacier plays an important role in melting," said Pietro Milillo of the Jet Propulsion Laboratory. "As more heat and water get under the glacier, it melts faster." The growing cavity sits in West Antarctica at the bottom of Thwaites Glacier, which is about as big...