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'Finger rafting:' Ice sheets that mesh when they meet
03-01-2007 · EurekAlert!A study reported in Physical Review Letters demonstrates how ice sheets sometimes interlace when they meet, rather than riding over or under each other, and discusses the implications for other phenomena from plate tectonics of the Earth's surface to the design of self-assembling nanostructures.
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Keywords: finger, rafting, ice, sheets, mesh, meet, sheet
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- Scientists observe drumlin beneath ice sheet
01-23-2007 · EurekAlert!
Scientists have discovered a warehouse-sized drumlin -- a mound of sediment and rock -- actively forming and growing under the ice sheet in Antarctica. Its discovery, and the rate at which it was formed, sheds new light on ice-sheet behavior. This could have implications for predicting how ice sheets contribute to sea-level rise. The results are published this week in the journal Geology.
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- Melting of the Greenland ice cap may have consequences for climatic change
05-07-2007 · EurekAlert!
At the last ice age, before the great ice sheets of the Arctic Ocean began to melt, early sporadic episodes of melting of the old ice sheet which covered the British Isles had already begun to affect the circulation of the ocean currents. Based on this observation, scientists consider that the acceleration of the melting of the Greenland ice cap could play an important role in the development of climate change.
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- December Geology and GSA Today media highlights
12-01-2006 · EurekAlert!
Topics include: impact of melting glaciers on near-shore ecosystems; discovery of intact egg clusters from a Middle Cambrian oceanic invertebrate; biotic recovery from the End-Permian mass extinction; fossil evidence of unusual animal foraging behavior; dating the destruction of Herod the Great's harbor at Caesarea; El Niсo-related landslides along the Big Sur coastline, and evidence of flowing water at Mars' Erebus crater. The GSA Today science article describes dynamics of ice sheet recession in East Antarctica.
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- Looking for life on Jupiter's icy moon Europa
02-23-2007 · EurekAlert!
If life exists on other planets, it almost certainly will be found where there's water. While many scientists pin their hopes on Mars, UC Berkeley paleobiologist Jere Lipps yearns to probe Jupiter's moon Europa, because its jumbled ice cover reminds him of the Antarctic ice sheets that are home to abundant life on Earth. Lipps and three other scientists discussed the possibilities at the recent AAAS meeting.
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- Greenland melt accelerating, according to CU-Boulder study
12-11-2007 · EurekAlert!
The 2007 melt extent on the Greenland ice sheet broke the 2005 summer melt record by 10 percent, making it the largest ever recorded there since satellite measurements began in 1979, according to a University of Colorado at Boulder climate scientist.
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- Alaska glacier speed-up tied to internal plumbing issues, says CU-Boulder study
01-15-2008 · EurekAlert!
A University of Colorado at Boulder study indicates meltwater periodically overwhelms the interior drainpipes of Alaska's Kennicott Glacier and causes it to lurch forward, similar to processes that may help explain the acceleration of glaciers observed recently on the Greenland ice sheet that are contributing to global sea rise.
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- New World Stopover: People may have entered the Americas in stages
02-16-2008 · Science News Online
People first reached the edge of the Americas about 40,000 years ago but had to stay put for at least 20,000 years before melting ice sheets allowed them to move south and settle the rest of the continent.
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- Glaciers adding more to global sea rise than ice sheets, says University of Colorado study
12-11-2006 · EurekAlert!
Despite growing public alarm over the shrinking Greenland and Antarctic ice sheets, it is small glaciers and ice caps that have been contributing the most to rising sea levels in recent years, according to a new University of Colorado at Boulder study.
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- Students enter competition to produce a zero-emissions snowmobile
02-26-2007 · EurekAlert!
Snowmobiles long ago replaced dogsleds for hauling people and cargo in the polar regions, particularly in remote research stations and field camps such as those on the Greenland Ice Sheet and in Antarctica.
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- Arctic expeditions find giant mud waves, glacier tracks
12-12-2007 · EurekAlert!
Scientists gathering evidence of ancient ice sheets uncovered a new mystery about what's happening on the Arctic sea floor today. Sonar images revealed that, in some places, ocean currents have driven the mud along the Arctic Ocean bottom into piles, with some "mud waves" nearly 100 feet across.
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