Geophysical Investigation of Seasonal Changes in the Basal Zone of Black Rapids Glaciers, Alaska

该奖项是为了支持在阿拉斯加激流型黑急流冰川进行高分辨率地震反射和无线电回波探测的项目。在流速的季节性波动期间，将确定冰川床结构的变化。测量将在一个地点进行，在那里，每年在融化季节的早期，速度会增加100%到400%。在加速之前和加速过程中，将对基带进行地球物理探测。地表运动和隆升、终末流的水、溶质和沉积物的排出、气象条件和冰碛的水位都将被监测。这些测量将使冰川床的形态能够在不同程度的基础运动时确定，从而为冰川和冰流运动的机制以及基础水的作用提供有价值的见解。

This award is for support of a program of high-resolution seismic reflection and radio-echo sounding on the surge-type Black Rapids Glacier, Alaska. Determination of changes in the structure of the glacier bed during seasonal fluctuations in velocity will be made. The measurements will be made at a location where a 100 to 400 % increase in speed is known to occur each year in the early melt season. Geophysical sensing of the basal zone will be performed before and during the speed-up. Surface motion and uplift, the discharge of water, solutes and sediment in the terminal stream, meteorological conditions, and water level in moulins will all be monitored. These measurements will allow the morphology of the glacier bed to be determined at times of differing amounts of basal motion, and thus provide valuable insight into the mechanisms of glacier and ice stream motion and the role of basal water.