Radar Studies of the Bed of an Active Ice Stream

该奖项支持南极冰流B上的地面雷达探测计划，其主要目的是确定冰层顶部、冰层底部和冰床顶部之间的差异运动。这将通过测量与冰床界面上的不规则性有关的绕射(“褪色”)图案相对于表面的移动来实现。差异运动可以用大约1米的分辨率来测量，这将归因于冰盖内的剪切变形和在其床上的滑动。还计划确定岩层地形，以便进行钻孔选址和应变分析，监测钻孔对含水层的横向渗透，研究内部分层，并使用短脉冲高分辨率雷达系统绘制近地表裂缝图。

This award supports a ground-based radar sounding program in Antarctica on Ice Stream B with a primary purpose of determining the differential motion between the top of the ice and the base of the ice and the top of the bed. This will be done by measuring the movement, relative to the surface, of diffraction ("fading") patterns associated with irregularities in the ice-bed interface. Differential motion, which can be measured with a resolution of about 1 meter, will be attributable to shear deformation within the ice sheet and sliding on its bed. It is also planned to determine bed topography for drill-hole site selection and strain analyses, monitor drill holes for lateral penetration of water layers, study internal layering, and map near- surface crevasses using a short-pulse, high-resolution radar system.