...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Temporal and spatial variations in periglacial soil movements on alpine crest slopes
【24h】

Temporal and spatial variations in periglacial soil movements on alpine crest slopes

机译：高山顶坡面冰缘土壤运动的时空变化

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

This paper describes tip to ten years of continuous monitoring of frost heave, creep and associated parameters on high mountain crest slopes in the Japanese and Swiss Alps, aiming to evaluate spatial and interannual variations in the rates and controls of soil movement. Shallow frost creep reflecting diurnal frost heave activity dominates the crest slopes that lack a vegetation mat and have a thin debris mantle with good drainage. Seasonal frost heave activity can induce slightly deeper movement where fine soil exists below the depth reached by diurnal freeze-thaw penetration, although the shallow bedrock impedes movements below 20 cm depth. As a result, downslope velocity profiles display strong concavity with surface velocities of 2-50 cm a(-1). The frost creep rates vary spatially, depending on the soil texture, slope gradient, frequency of temperature cycling across 0degreesC and moisture availability during freeze-thaw periods. Soil movements recur in every freeze-thaw period, although with some interannual variations affected by the length of seasonal snow cover and the occurrence of precipitation during freeze-thaw periods. The Swiss Alps encounter more significant interannual variations than the Japanese Alps, reflecting the large variability of the annual snow regime. Copyright (C) 2005 John Wiley Sons, Ltd.
机译：本文介绍了连续十年对日本和瑞士阿尔卑斯山高山顶斜坡上的冻胀，蠕变及相关参数进行连续监测的十年，旨在评估土壤运动速率和控制的空间和年际变化。反映昼间冻胀活动的浅霜蠕变占主导地位，在没有植被垫的顶坡上占主导地位，而它们的地幔薄薄且排水良好。季节性的冻胀活动可能会引起稍深的运动，尽管日基冻融渗透所达到的深度以下，但存在细土时，细土存在，尽管浅基岩会阻止深度低于20 cm的运动。结果，下坡速度剖面显示出强凹度，表面速度为2-50 cm a（-1）。霜的蠕变速率在空间上变化，这取决于土壤质地，坡度，温度在0℃循环的频率以及冻融期的水分供应。土壤运动在每个冻融期都会发生，尽管每年季节性变化都受到季节性积雪长度和冻融期降水的影响。与日本阿尔卑斯山相比，瑞士阿尔卑斯山的年际变化更为显着，这反映了年度降雪状况的巨大变化。版权所有（C）2005 John Wiley Sons，Ltd.

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