...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Geomorphology >Gladation of alpine valleys: The glacier - debris-covered glacier - rock glacier continuum
【24h】

Gladation of alpine valleys: The glacier - debris-covered glacier - rock glacier continuum

机译：高寒山谷的冰川形成：冰川-残骸覆盖的冰川-岩石冰川连续体

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Alpine ice varies from pure ice glaciers to partially debris-covered glaciers to rock glaciers, as defined by the degree of debris cover. In many low- to mid-latitude mountain ranges, the few bare ice glaciers that do exist in the present climate are small and are found where snow is focused by avalanches and where direct exposure to radiation is minimized. Instead, valley heads are more likely to be populated by rock glaciers, which can number in the hundreds. These rock-cloaked glaciers represent some of the most identifiable components of the cryosphere today in low- to mid-latitude settings, and the over-steepened snouts pose an often overlooked hazard to travel in alpine terrain. Geomorphically, rock glaciers serve as conveyor belts atop which rock is pulled away from the base of cliffs. In this work, we show how rock glaciers can be treated as an end-member case that is captured in numerical models of glaciers that include ice dynamics, debris dynamics, and the feedbacks between them. Specifically, we focus on the transition from debris-covered glaciers, where the modern equilibrium line altitude (ELA) intersects the topography, to rock glaciers, where the modern ELA lies above the topography.
机译：高山冰的范围从纯冰冰川到部分覆盖有碎屑的冰川，再到岩石冰川，其变化程度取决于碎片覆盖的程度。在许多中低纬度山区，在当前气候下确实存在的裸露冰河很少，并且在雪被雪崩集中并且直接暴露于辐射的情况下被发现。取而代之的是，山谷的头顶更有可能由数以百计的岩石冰川组成。在中低纬度地区，这些岩石掩盖的冰川代表了当今冰冻圈中最可识别的部分，而且过度陡峭的口鼻部对于在高山地形中旅行经常构成被忽视的危险。从地貌上讲，岩石冰川充当输送带，岩石从悬崖底部被拉出。在这项工作中，我们展示了如何将冰川冰川视为最终成员案例，并在包含冰动力学，碎屑动力学以及它们之间的反馈的冰川数值模型中捕获了它们。具体来说，我们重点关注从现代平衡线高度（ELA）与地形相交的碎屑覆盖的冰川到现代ELA位于地形上方的岩石冰川的过渡。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号