Quest begins to drill Antarctica's oldest ice

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Scientists hope this ice can help them explain why Earth's ice ages flipped in frequency in the deep past.

At an altitude of 3,233m above sea level and over 1,000km from the coast, Little Dome C will be an inhospitable place to work. Even in summer, temperatures won't get much above -35C.

The deep ice in Antarctica contains tiny bubbles of air. These little gas pockets are a direct snapshot of the historic atmosphere. These cycles occurred roughly every 100,000 years - a phasing that is most likely linked to slight shifts in the eccentricity of Earth's orbit around the Sun. "We believe this ice core will give us information on the climate of the past and on the greenhouse gases that were in the atmosphere during the Mid-Pleistocene Transition , which happened between 900,000 and 1.2 million years ago," said team-leader Carlo Barbante, the director of the Institute of Polar Sciences of the National Research Council of Italy.

 

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