Keyword: antarctica
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WASHINGTON (AP) — Feeling chilly? Here's cold comfort: You could be in East Antarctica which new data says set a record for "soul-crushing" cold. Try 135.8 degrees Fahrenheit below zero; that's 93.2 degrees below zero Celsius, which sounds only slightly toastier. Better yet, don't try it. That's so cold scientists say it hurts to breathe.
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Poor Global Warming just can’t catch a break. Planetary temperatures aren’t cooperating, nor is the rate of sea level rise, and now even West Antarctica seems to be gouging James Hansen in the eye.
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Seismologists working in a mountainous area of Marie Byrd Land in western Antarctica detected a swarm of low-magnitude earthquakes in 2010 and 2011 similar to those that can precede volcanic eruptions... and the characteristics and depth of the seismic events are consistent with those found in volcanic areas of Alaska’s Aleutian Islands, the Pacific Northest, Hawaii and Mt. Pinatubo in the Philippines... The tight focus of the 1,370 tremors and their deep, long-period waves helped researchers rule out ice quakes, glacial motion or tectonic activity as causes. So, too, did their apparent depth: At 15-25 miles beneath the sub-glacial surface,...
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There is a five-story, blood-red waterfall pouring slowly from the Taylor Glacier in Antarctica's McMurdo Dry Valley. Its back story, at Atlas Obscura, is simply remarkable: Roughly 2 million years ago, the Taylor Glacier sealed beneath it a small body of water which contained an ancient community of microbes. Trapped below a thick layer of ice, they have remained there ever since, isolated inside a natural time capsule. Evolving independently of the rest of the living world, these microbes exist without heat, light, or oxygen, and are essentially the definition of "primordial ooze." The trapped lake has very high salinity...
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McMurdo Station, Antarctica (AP) -- The Republican's shutdown of the US Federal Government claimed another casualty today when scientists announced that Antarctica will be closed until further notice. Although the US government does not technically own the world's Southernmost land mass, scientists funded by Federal tax dollars have had a presence on the continent for over fifty years. And with the Federal government shut down, that means the base, and all of the land it sits on, must remain closed until a new budget resolution is passed. "It seems harsh," said Dr. Will Moresby, director of McMurdo Station on the...
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Earth has gained 19,000 Manhattans of sea ice since this date last year, the largest increase on record. There is more sea ice now than there was on this date in 2002.
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Scientists have long tried to figure out what causes the ebb and flow of ice ages. New data suggests a novel explanation for why the mile-thick blankets of ice retreat so quickly: They become too heavy. For the last 900,000 years, mile-thick ice sheets have waxed and waned in the Northern Hemisphere with remarkable regularity – building over periods of about 100,000 years and retreating in the space of only a few thousand years, only to repeat the cycle. Now, a team of scientists from Japan, the US, and Switzerland suggests that the North American continent is the breeding ground...
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Working on some area and latitude calculations for sea ice. many hundreds of on-line references report that the Antarctic continent is 14,000,000 square kilometers: A nice, convenient even round number. That's obviously always been rounded off as one source copies from everybody, or just never measured accurately. Neither seems correct. the NSIRDC tracks sea ice, and they have explicitly written me that their "Antarctic Sea Ice"totals do NOT include the permanent ice shelves around many areas of that continent. Fine, no problem: and it even makes sense: Why should a federal agency track "permanent sea shelves" when they can get...
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Global warming five million years ago may have caused parts of Antarctica's large ice sheets to melt and sea levels to rise by approximately 20 metres, scientists report today in the journal Nature Geoscience. The researchers, from Imperial College London, and their academic partners studied mud samples to learn about ancient melting of the East Antarctic ice sheet. They discovered that melting took place repeatedly between five and three million years ago, during a geological period called Pliocene Epoch, which may have caused sea levels to rise approximately ten metres.
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A massive iceberg, larger than the city of Chicago, broke off of Antarctica's Pine Island Glacier on Monday (July 8), and is now floating freely in the Amundsen Sea, according to a team of German scientists. The newborn iceberg measures about 278 square miles (720 square kilometers), and was seen by TerraSAR-X, an earth-observing satellite operated by the German Space Agency (DLR). Scientists with NASA's Operation IceBridgefirst discovered a giant crack in the Pine Island Glacier in October 2011, as they were flying over and surveying the sprawling ice sheet. At that time, the fissure spanned about 15 miles (24...
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Pine Island Glacier (PIG), the longest and fastest flowing glacier in the Antarctic, has spawned a huge iceberg. The block measures about 720 sq km in area - roughly eight times the size of Manhattan Island in New York. Scientists have been waiting for the PIG to calve since October 2011 when they first noticed a spectacular crack spreading across its surface. Confirmation that the fissure had extended the full width of the glacier was obtained on Monday. It was seen by the German TerraSAR-X satellite. This carries a radar instrument that can detect the surface of the ice stream...
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Colored polygons represent different geological units that have been mapped (and inferred) by geologists over many years. These geological units formed before the continents broke apart, so we can use their position to put the "jigsaw pieces" back together again. Many other reconstructions do not use the geological boundaries to match the continental "jigsaw pieces" back together - so they don't align properly. Courtesy of University of Royal Holloway London A new study published in the journal Gondwana Research, has revealed the past position of the Australian, Antarctic and Indian tectonic plates, demonstrating how they formed the supercontinent Gondwana 165...
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Analysis of ice cores obtained from the basin of Lake Vostok, the subglacial lake that Russian scientists drilled down to in 2012, have revealed DNA from an estimated 3,507 organisms. While the majority were found to be bacteria, many of which were new to science, there were also other single celled organisms and multicellular organisms found, including from fungi. The diversity of life from the lake has surprised scientists as many had thought the lake would be sterile due to the extreme conditions. Lake Vostok was first covered by ice more than 15 million years ago and is now buried...
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Six billion tonnes of water may have been dumped into the ocean all at once after an underground Antarctic lake overtopped, causing the ice sheet above it to slump into a giant 260 square-kilometre crater.
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The Antarctic continent is a frozen landscape of snow and sleet, but a new map from NASA exposes what the region would look like if all the ice were to disappear.
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Prof Christian Sidor and his colleagues headed by Dr Linda Tsuji, also from the University of Washington, created two ‘snapshots’ of four legged-animals about 5 million years before and again about 10 million years after the Earth’s largest mass extinction (about 252 million years ago). Prior to the extinction event, for example, the pig-sized Dicynodon was a dominant plant-eating species across southern Pangea. Pangea is the name given to the landmass when all the world’s continents were joined together. Southern Pangea was made up of what is today Africa, South America, Antarctica, Australia and India. After the mass extinction at...
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In the new study (pdf), Pierre Haenecour of Washington University in St. Louis and his colleagues analyzed two meteorites collected in Antarctica in 2003, each named for a geographic feature near the spot where the meteorite fell. (Antarctica makes an ideal hunting ground for dark-colored meteorites, which stand out clearly against the ice fields.) Grove Mountains 021710, found by a Chinese expedition, and LaPaz Icefield 031117, collected by U.S. searchers, each harbor presolar grains of silica (SiO2), the researchers found, as evidenced by the grains’ enrichment in a heavy isotope of oxygen known as oxygen 18. That signature points to...
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The cold, dry atmosphere above the South Pole will allow the SPT to more easily detect the CMB (cosmic microwave background) radiation, the afterglow of the big bang, with minimal interference from water vapor. On the electromagnetic spectrum, the CMB falls somewhere between heat radiation and radio waves. The CMB is largely uniform, but it contains tiny ripples of varying density and temperature. These ripples reflect the seeds that, through gravitational attraction, grew into the galaxies and galaxy clusters visible to astronomers in the sky today. The SPT's first key science project will be to study small variations in the...
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Kulesa and his team communicate with the telescope remotely via satellite, sending it new orders and instructions throughout the year, and downloading new data. They also keep a watchful eye on their experiment through a webcam, which sends image updates from roughly 9,000 miles away roughly every hour. Why Antarctica, though? Even the smallest amount of water vapor in Earth's atmosphere absorbs terahertz-frequency light from space before it reaches a telescope on Earth... From Tucson, Kulesa said, it's about 5-10 millimeters deep in winter and up to 40 millimeters deep during monsoon season in summer. At the telescope site in...
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Russian scientists said March 7 that they might have found a new form of bacterial life that had been entombed in a lake deep under Antarctica for millions of years. But Saturday AFP reported that the Russian scientists retracted the statement.
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