U.S.-Sweden Cooperative Research: The Effect of Water- saturated Deformable Basal Till on Glacier Dynamics

该奖项将支持合作研究， Roger L.教授胡克，明尼苏达大学，圣。 保罗，和教授Wibjorn卡伦，大学 斯德哥尔摩。 这项研究将有助于 正在进行的调查过程中发生的 冰川及其下伏层的界面。 的 时间和空间的变化之间的耦合 冰川和这一层，特别是 在水压对滑动速度的影响中， 在瑞典北方的Storglacier进行研究。 教授 虎克和他的瑞典合作者 在过去的六年里， 年 这项工作将扩展以前的测量， 地表速度，冬季积雪， 烧蚀和井眼变形， 测量表面倾斜和应变，水 钻孔中的压力变化、内部排水， 冰川的沉积物和水的排放 终点站 所有这些研究的相关性将 有助于加深对 冰川流 斯德哥尔摩大学的塔法拉研究 作为这些研究的基地， 冰川，并提供优良的设施， 记录和分析要获得的数据。 拟议的合作提出了美国。 调查员有机会使用高度 专业设施，紧邻 他的实验对象。 冰川研究 动态越来越重要，因为土地 利用延伸到更接近山谷冰川， 中纬度地区。 这些研究也 需要了解未来预期的影响 冰川上的海平面上升。

This award will support collaborative research between Professor Roger L. Hooke, University of Minnesota, St. Paul, and Professor Wibjorn Karlen, University of Stockholm. This research will contribute to an on-going investigation of processes that occur at the interface of glaciers and their underlying layer. The variations in time and space of the coupling between the glacier and this layer, particularly as reflected in water pressure effects on sliding velocity, will be studied on the Storglacier in northern Sweden. Prof. Hooke and his Swedish collaborators have been involved with studies of the Storglacier for the past six years. This work will extend previous measurements of surface velocities, winter snow accumulation, ablation, and borehole deformation, by adding measurements of surface tilt and strain, water pressure variations in boreholes, internal drainage, and sediment and water discharge at the glacier terminus. Correlation of all of these studies will lead to an enhanced understanding of the dynamics of glacial flow. The University of Stockholm's Tarfala Research Station, the base for these studies, is located near the glacier, and provides excellent facilities for the recording and analysis of the data to be obtained. The proposed cooperation presents the U.S. investigator with an opportunity to use highly specialized facilities, immediately adjacent to the subject of his experiments. Studies of glacier dynamics are of increasing importance, as land utilization extends closer to valley glaciers in mid-latitude regions. These studies are also necessary to understand the effect of future expected sea-level rises on glaciers.