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The refrozen structures form because the vast Antarctic ice sheet acts like blanket trapping geothermal heat from the Earth beneath. Image: Imaging Antarcticas ghost mountains.
courtesy British Antarctic Survey / AGAP, SOURCE
This thinner and colder ice refreezes the water, creating the spectacular structures observed close to the base of the ice sheet. Image: Twin Otter flying over AGAP camp.
courtesy British Antarctic Survey / AGAP, SOURCE
We did not think that water moving through ancient river valleys beneath more than one mile of ice would alter the basic structure of the ice sheet. Image: AGAP team.
courtesy British Antarctic Survey / AGAP, SOURCE

Antarctic ice sheet grows from below

Posted: Mar 07, 2011 01:03 pm EST

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(Press release by British Antarctic Survey & Lamont-Doherty Press Offices, March 3, 2011) The discovery of numerous large ice structures within Antarcticas Dome A region, the site of the buried ghost mountains, reveals new understanding about ice sheet growth and movement that is essential for predicting how the ice sheet may change as the Earths climate warms. Reporting this week in the journal Science a six-nation group of scientists studying the Gamburtsev Subglacial Mountains describe how these remarkable structures...

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