Measurement of Short Period Variations in the Speed of Ice Stream B, West Antarctica

南极洲西部冰流 B 速度短期变化的测量

• 批准号: 8716604
• 负责人: William Harrison
• 金额: $ 13.44万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-05-01 至 1990-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8716604&HistoricalAwards=false
• 关键词: Measurement; Short; Period; Variations; Speed

The objectives of this investigation is to determine the presence of short-period variability in the flow of Ice Stream B, West Antarctica and to measure the propagation of any observable motion events along the ice stream. The results of this study, when combined with the borehole measurements (basal water pressure, motion at and within the bed), will lead to a more complete understanding of the mechanisms which govern ice stream flow and fast glacier motion in general. A linear array of high-resolution vertical wire strain meters and geophones will continuously monitor temporal changes in the strain field and seismic activity over a one to two-year period. The array will be centered at the Upstream B drill site and will overlap with a strain grid. Flow velocity at the drill site will be measured daily during the field season. Taken together, these measurements will delineate any flow variations which arise from changing conditions at the basal interface. As such, the proposed research will form an important and integral part of the borehole drilling program on Ice Stream B.

这次调查的目的是确定 西冰流B流量的短期变化 南极洲，并测量任何可观察到的 沿着冰流沿着的运动事件。 这项研究的结果，当结合钻孔 测量（基础水压力，运动和内 床），将导致一个更完整的了解 控制冰流流动和冰川快速运动的机制 梗概. 高分辨率垂直线应变仪线性阵列， 地震检波器将持续监测 应变场和地震活动。 阵列将位于上游B钻井现场的中心， 与应变网格重叠。 钻井现场的流速将 在田间季节每天测量。 综上所述各项 测量将描述任何流量变化， 改变基底界面的条件。 因此， 拟议的研究将构成一个重要的和不可分割的一部分， 冰流B钻孔程序。