Relation between Basal Water and Sliding in a Large Tidewater Glacier

这一奖项是为了支持阿拉斯加哥伦比亚冰川的一项实地测量计划，该计划旨在确定冰川的基本水压和累积在冰床上的水量影响冰川基本滑动速度的关系。哥伦比亚冰川在海平面以下的峡湾中搁浅；最近，它开始迅速消退，同时冰山以更快的速度崩解进入威廉王子湾。这为研究快速冰川流动和冰川下水之间的关系提供了一个独特的机会。坎布博士和他的同事们将测量在冰川底部钻探的钻孔中的冰下水压，并将水压的变化与地表速度的变化联系起来。表面速度、水平衡和气象观测将由Mark F.Meier博士和他的同事同时进行(配套提案DPP

This award is in support of a program of field measurements of Columbia Glacier, Alaska, to establish the relationships by which basal water pressure and volume of water accumulated at the bed influence the basal sliding velocity of the glacier. Columbia glacier is grounded well below sea level in a fjord;recently it began retreating rapidly while calving icebergs at an increased rate into Prince William Sound. It provides a unique opportunity to study the relationships between fast glacier flow and subglacier water. Dr. Kamb and his colleagues will measure subglacial water pressure in bore holes drilled to the bottom of the glacier, and to correlate variations in water pressure with variations in surface velocity. Surface velocity, water balance, and meteorological observations will be made simultaneously by Dr. Mark F. Meier and his colleagues (companion proposal DPP