BAS glaciologist using ice drill

BAS glaciologist using ice drill

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Credit: D.A. PEEL/SCIENCE PHOTO LIBRARY

Caption: British Antarctic Survey (BAS) glaciologists use an electromechanical ice drill to extract ice cores from within the Antarctic ice sheet. This type of drill can reach depths of 300 metres, yielding ice that fell as snow several thousand years ago. The ice cores are transported back to BAS headquarters at Cambridge, England, where various techniques are employed to analyse in extremely fine detail the chemical & radiochemical trace elements they contain. This data provides evidence of past changes in climate & of current trends in the pollution of the atmosphere.

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Keywords: antarctic, drilling, environment, glaciology, ice core, of ice core

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