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Latest Ice sheet Stories

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2008-11-17 13:24:34

Scientists say that enormous floods beneath the Antarctic ice sheet can now be linked directly to the speed at which that ice moves towards the ocean. The giant Byrd Glacier in east Antarctica sped up just as two lakes under the ice overflowed, according to Leigh Stearns and colleagues. They say the floodwater acts as a lubricant, easing the ice over the bedrock. Experts believe the more ice the Polar Regions dump in the ocean, the higher the waters will rise. Ice behavior in response to a...

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2008-11-13 08:40:00

Observations from satellites now allow scientists to monitor changes to water levels in the sea, in rivers and lakes, in ice sheets and even under the ground. As the climate changes, this information will be crucial for monitoring its effects and predicting future impacts in different regions. Sea level rise in one of the major consequences of global warming, but it is much more difficult to model and predict than temperature. It involves the oceans and their interaction with the atmosphere,...

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2008-11-06 09:30:00

A NASA-led research team has used satellite data to make the most precise measurements to date of changes in the mass of mountain glaciers in the Gulf of Alaska, a region expected to be a significant contributor to global sea level rise over the next 50-100 years.Geophysicist Scott Luthcke of NASA's Goddard Space Flight Center, Greenbelt, Md., and colleagues knew from well-documented research that changes in the cryosphere "“ glaciers, ice caps, and other parts of the globe covered...

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2008-10-31 08:40:00

Human activities are making both Antarctica and the Arctic less icy because of global warming, scientists said on Thursday. An international team published their findings in the recent Nature Geoscience journal. "We're able for the first time to directly attribute warming in both the Arctic and the Antarctic to human influences," said Nathan Gillett of England's University of East Anglia of a study he led with colleagues in the United States, Britain and Japan. The research team measured...

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2008-10-29 10:29:36

Scientists from the U.S., U.K. and Australia have teamed up to explore two of the last uncharted regions of Earth, the Aurora and Wilkes Subglacial Basins, immense ice-buried lowlands in Antarctica with a combined area the size of Mexico. The research could show how Earth's climate changed in the past and how future climate change will affect global sea level. Scientists believe the barely observed Aurora Subglacial Basin, which lies in East Antarctica, could represent the weak underbelly of...

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2008-09-05 12:55:00

A US team of researchers concluded that global sea levels are very unlikely to reach above 2m during this century. In fact, the speed of glaciers resulting in a rise over 2m is "physically untenable", researchers note in Friday's edition of the journal Science. Scientists say that news is still nothing to applaud. "Even a sea level rise of 20cm (8in) in a century will have quite dramatic implications," said Shad O'Neel from the US Geological Survey (USGS). "This work is in no way meant to...

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2008-08-29 08:55:00

Only changes in carbon dioxide levels are able to explain the transition from the mostly ice-free Greenland of three million years ago, to the ice-covered Greenland of today There have been many reports in the media about the effects of global warming on the Greenland ice-sheet, but there is still great uncertainty as to why there is an ice-sheet there at all. Reporting yesterday (28 August) in the journal Nature, scientists at the University of Bristol and the University of Leeds show that...

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2008-08-13 00:15:00

Four years of scientific research on ice core data has brought to light the warming trend in West Antarctica, the world's coldest climate.  According to the study, the West Antarctic warmed in response to higher temperatures in the tropical Pacific, which itself has been warming due to weather patterns including an El Nino event from 1939 to 1942 and greenhouse emissions from cars and factories. "An increasingly large part of the signal is becoming due to human activity," said the...

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2008-07-30 09:15:00

Eight square miles worth of giant ice sheets broke off an ice shelf in the Canadian Arctic last week, and scientists said on Tuesday that global warming could be to blame. Experts say temperatures in large parts of the Arctic have increased far faster than the global average in recent decades. In one of the northernmost parts of Canada, the ice broke away from the shelf on Ward Hunt Island, which is a small island just off giant Ellesmere Island. It was the largest fracture of its kind...

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2008-06-27 06:38:39

Predicting climate change depends on many factors not properly included in current forecasting models, such as how the major polar ice caps will move in the event of melting around their edges. This in turn requires greater understanding of the processes at work when ice is under stress, influencing how it flows and moves. The immediate objective is to model the flow of ice sheets and glaciers more accurately, leading in turn to better future predictions of global ice cover for use in climate...


Word of the Day
snash
  • To talk saucily.
  • Insolent, opprobrious language; impertinent abuse.
This word is Scots in origin and probably imitative.