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

阿拉斯加黑急流冰川基底带季节变化的地球物理调查

• 批准号: 9122540
• 负责人: Charles Raymond
• 金额: $ 12.3万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-07-01 至 1996-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9122540&HistoricalAwards=false
• 关键词: Geophysical; Investigation; Seasonal; Changes; Basal

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.

该奖项是为了支持一个高分辨率地震项目， 涌浪型黑色急流上的反射和无线电回波探测 阿拉斯加的冰川 结构变化的确定 冰川床在速度季节性波动期间将 进行了测量将在一个100到100英里的地方进行。 400%的速度增加是众所周知的发生在每年的早期 融化季节 将对基底区进行地球物理探测， 在加速之前和加速过程中进行。 表面运动与 隆起，水，溶质和沉积物的排放 终端流，气象条件和水位， 所有冰川穴都将受到监控。 这些测量将允许 冰川床的形态将在 不同的基础运动量，从而提供有价值的 深入了解冰川和冰流运动的机制， 基础水的作用。