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Johan Dahl Land, south Greenland: the end of a 20th century glacier expansion

机译：格陵兰南部的约翰·达尔土地：20世纪冰川扩张的终结

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摘要

The Qajuuttap Sermia glacier system north of Johan Dahl Land, on the southern slope of the Greenland ice sheet (the inland ice), has shown continuous advancing behaviour from approximately 1940 until approximately 2000. This contrasts with neighbouring sectors of the inland ice to the west and southeast, where the ice sheet has shown a more 'normal' trend of recession and thinning of the margin since about 1850-1890, and that has continued throughout the last half of the 20th century. The Qajuuttap Sermia glacier system has also attracted interest for its hydropower potential, and detailed investigations were carried out in 1977-1983. This article summarises the fluctuations of the Qajuuttap Sermia glacier system, and documents the demonstrable advance of the individual glaciers of the system from the early 1940s until the early years of the present millennium. The cause of the advance seems likely to be related to variations in precipitation over the southernmost parts of the inland ice, with the highlands north of Johan Dahl Land directly influencing the passage of low pressure systems moving both northwards along the west coast and northeastwards along the east coast of Greenland.
机译：在格陵兰冰盖（内陆冰）南坡的约翰·达尔土地北部的Qajuuttap Sermia冰川系统从1940年到2000年一直表现出持续的推进行为。这与西侧内陆冰的邻近区域形成鲜明对比。东南和东南部，自大约1850-1890年以来，冰盖出现了更为“正常”的衰退和边缘变薄趋势，这种趋势在整个20世纪后半叶一直持续。 Qajuuttap Sermia冰川系统也因其水力发电潜力而引起了人们的兴趣，并在1977-1983年进行了详细调查。本文总结了Qajuuttap Sermia冰川系统的波动，并记录了该系统的单个冰川从1940年代初到本世纪初的明显进展。推进的原因可能与内陆冰河最南端的降水变化有关，其中约翰·达尔土地以北的高地直接影响着低压系统的通道，低压系统既向西沿西北海岸向北移动，又沿西向东北向移动。格陵兰岛东海岸。

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  • 来源
    《Polar Record》 |2009年第235期|337-350|共14页
  • 作者

    Anker Weidick;

  • 作者单位

    Geological Survey of Denmark and Greenland, Oster Voldgade 10, DK-1350 Copenhagen K, Denmark;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
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