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TOPIC: Antarctica
Blobrana


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Gamburtsev subglacial mountains
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Scientists who mapped one of the most enigmatic mountain ranges on Earth have given a first glimpse of their data.
An international team spent two months in 2008/9 surveying the Gamburtsevs in Antarctica - a series of peaks totally buried under the ice cap.
The group has told a major conference in the US that the hidden mountains are more jagged than previously thought.
They are also more linear in shape than the sparse data collected in the past had suggested.
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Blobrana


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RE: Antarctica
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Antarctica 2009: Beneath Pine Island Glacier



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Blobrana


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East Antarctica 'is losing ice'

The East Antarctic ice sheet has been losing mass for the last three years, according to an analysis of data from a gravity-measuring satellite mission.
The scientists involved say they are "surprised" by the finding, because the giant East Antarctic sheet, unlike the west, has been thought to be stable.
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Blobrana


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Mysteriously warm times in Antarctica

A new study of Antarctica's climate history shows that in some brief warm periods between ice ages, temperatures were up to 6oC warmer than the present day. The findings, reported this week in the journal Nature, could help us understand more about rapid climate changes.
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Blobrana


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A team of U.S. and British scientists braved lions and hyenas in East Africa to extract microfossils in samples of rocks, which helped them link declining levels of carbon dioxide in the atmosphere with the formation of an ice sheet on Antarctica about 34 million years ago.
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Blobrana


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Scientists have revealed that Antarctica went through a heat wave nearly 15.7 million years ago during which plants and algae were abundant, a scientific breakthrough which would help in understanding climate change.
An international team, led by LSU Museum of Natural Science, has found evidence of the warm period in Antarctica that lasted for a few thousand years by analysing fossils.
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Blobrana


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New data illuminates Antarctic ice cap formation
New carbon dioxide data confirm that formation of the Antarctic ice-cap some 33.5 million years ago was due to declining carbon dioxide in the atmosphere.
A team of scientists from Bristol, Cardiff and Texas A&M universities braved the lions and hyenas of a small East African village to extract microfossils from rocks which have revealed the level of CO2 in the Earths atmosphere at the time of the formation of the ice-cap.
Geologists have long speculated that the formation of the Antarctic ice-cap was caused by a gradually diminishing natural greenhouse effect. The studys findings, published in Nature online, confirm that atmospheric CO2 started to decline about 34 million years ago, during the period known to geologists as the Eocene - Oligocene climate transition, and that the ice sheet began to form about 33.5 million years ago when CO2 in the atmosphere reached a tipping point of around 760 parts per million (by volume).

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Blobrana


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Gamburtsev subglacial mountains
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US-led, International Research Team Confirms an Alps-like Mountain Range Exists under the East Antarctic Ice Sheet
Flying twin-engine light aircraft the equivalent of several trips around the globe and establishing a network of seismic instruments across an area the size of Texas, a U.S.-led, international team of scientists has not only verified the existence of a mountain range that is suspected to have caused the massive East Antarctic Ice Sheet to form, but also has created a detailed picture of the rugged landscape buried under more than four kilometres  of ice.

"Working cooperatively in some of the harshest conditions imaginable, all the while working in temperatures that averaged -30 Celsius, our seven-nation team has produced detailed images of last unexplored mountain range on Earth. As our two survey aircraft flew over the flat white ice sheet, the instrumentation revealed a remarkably rugged terrain with deeply etched valleys and very steep mountain peaks" - Michael Studinger, of Columbia University's Lamont-Doherty Earth Observatory, the co-leader of the U.S. portion of the Antarctica's Gamburstev Province (AGAP) project.

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Blobrana


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RE: Antarctica
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UCSB Scientists Propose Antarctic Location for 'Missing' Ice Sheet
New research by scientists at UC Santa Barbara indicates a possible Antarctic location for ice that seemed to be missing at a key point in climate history 34 million years ago. The research, which has important implications for climate change, is described in the August issue of Geophysical Research Letters. The new study, by showing that West Antarctica had a higher elevation 34 million years ago than previously thought, reveals a possible site for the accumulation of the early ice that is unaccounted for.

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Blobrana


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Antarctic glacier thinning at alarming rate
The thinning of a gigantic glacier in Antarctica is accelerating, scientists warned today.
The Pine Island Glacier in West Antarctica, which is around twice the size of Scotland, is losing ice four times as fast as it was a decade years ago.

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