Studies of the Role of Water in Glacier Dynamics

这项调查是一项正在进行的冰川床过程研究。目的是研究冰川与河床耦合的时空变化，建立冰川水压变化与滑动速度的关系，研究冰川内部排水的性质和演变。该研究的实地部分将在瑞典北部的Storglaciaren进行，从斯德哥尔摩大学的tarfala研究站可以很容易地到达。每周，在某些情况下，每天测量桩子的运动，结合测量水压变化和冰川底部钻孔的内部变形。还将进行应变和倾斜的连续测量，使用染料示踪剂研究内部排水，以及监测地表消融和末端的水和沉积物排放。了解基底过程，特别是冰下水压的影响对于理解基底滑动至关重要。

This investigation is an on-going study of processes at a glacier bed. The objectives are to study time and space variations in the coupling between the glacier and its bed, to develop a relation between water pressure variations and sliding velocity, and to study the nature and evolution of internal drainage within glacier. The field part of the study will be conducted on Storglaciaren in northern Sweden, which is readily accessible from the University of Stockholm's tarfala Resedarch Station. Weekly and, in some cases, daily measurements of stake movements will be made, combined with measurements of water pressure variations and internal deformation in holes bored to the base of the glacier. Continuous measurements of strain and tilt, studies of internal drainage with the use of dye tracers, and monitoring of surface ablation and water and sediments discharge at the ternimous will also be carried out. Understanding of basal processes and, in particular, the effects of subglacial water pressure is critical in the effort to understand basal sliding.