Glacier grows from below

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Glacier grows from below

机译：冰川从下方生长

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A large fraction of the thick ice sheet that covers East Antarctica's high interior is formed by liquid water freezing on to the bottom of the ice. Ice sheets were thought to thicken at the top as accumulating snow is transformed into ice. But a radar survey of the structure of the ice sheet around Antarctica's remote Dome A (pictured), conducted between 2007 and 2009, reveals that up to half of the 2,400-3,000-metre-thick ice package found above valleys in the subglacial Gamburtsev mountain range has been added from below, curving the overlying ice.

机译：覆盖东极南极内部的厚厚冰原的很大一部分是由液态水冻结在冰底形成的。积雪被转化为冰，人们认为冰盖的顶部会变厚。但是，在2007年至2009年之间对南极洲偏僻的Dome A周围的冰盖结构进行了雷达调查（如图），发现在冰川之下的甘布尔采夫山山谷上方发现的2,400-3,000米厚的冰袋中，多达一半范围从下方添加，弯曲了上面的冰。

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《Nature》 |2011年第7337期|p.138|共1页
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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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Glacier grows from below

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