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Ancient Antarctic fjords

机译:古代南极峡湾

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摘要

Ice sheets reflect 90% of incoming solar radiation and are of considerable mass, and hence affect Earth's global geophysical parameters. To gain insight into the mechanisms of the potentially long response times of ice sheets, it is necessary to study them from a long-term geological perspective. In Antarctica, reconstructing ice-sheet drainage patterns at times of past ice-sheet minima is a challenge: today 98% of the continent is buried under several kilometres of ice. Airborne geophysical surveys that penetrate the ice have helped to meet that challenge, and have contributed significantly to what is known about Antarctica's bed topography. In reconstructing the subglacial topography of the deep Aurora Sub-glacial Basin in East Antarctica, Young et al.' (page 72 of this issue) have made a notable discovery by revealing subglacial landscapes in astonishing detail.
机译:冰盖反射了90%的入射太阳辐射,质量相当大,因此会影响地球的全球地球物理参数。为了深入了解冰盖潜在的较长响应时间的机制,有必要从长期的地质角度进行研究。在南极洲,要重建过去的冰盖极小值时的冰盖排水模式是一个挑战:如今,该大陆的98%被埋在几公里的冰下。穿透冰层的航空地球物理勘测有助于应对这一挑战,并为已知的南极洲地貌做出了重大贡献。 Young等人在重建南极东部深奥罗拉亚冰川盆地的冰下地形时说。 (本期第72页)通过惊人地揭示冰下景观而做出了显着的发现。

著录项

  • 来源
    《Nature》 |2011年第7349期|p.46-47|共2页
  • 作者

    SANDRA PASSCHIER;

  • 作者单位

    Department of Earth and Environmental Studies,Montclair State University, Montclair,New Jersey 07043, USA;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
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