Development and Placement of Instrumented Probes for Studies of Deforming Subglacial Till

用于研究冰下变形的仪器探头的开发和放置

• 批准号: 0085085
• 负责人: William Harrison
• 金额: $ 53.68万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-11-15 至 2003-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0085085&HistoricalAwards=false
• 关键词: Development; Placement; Instrumented; Probes; Studies

AbstractOPP-00-85085HarrisonEchelmeyerThe Principal Investigators will be funded for two years to develop techniques for inserting instrumented probes into several meters of actively deforming till under the Black Rapids Glacier in Alaska. Recent observations have identified a four to seven meter till layer under the most active part of the Glacier, and that almost two-thirds of the surface motion of the glacier is due to processes acting in the bottom few meters of the till. There is negligible sliding at the ice-till interface. Till has been observed under other glaciers, and in many of them, it may affect their flow pattern. Therefore, it is important to develop a method for studying the flow of thick, active till. The Principal Investigators will drill to the to the top of the till using a hot-water drill and then drive the probes into the till with a heavy down-hole hammer and receive data without the use of wires. At the present time, there is no adequate way to investigate the behavior of tills in situ under thick, rapidly moving ice. This research effort would develop the means to make these essential measurements.

哈里森·埃切梅耶（HarrisonEchelmeyer）将为主要研究人员提供两年的资金，以开发将仪器探针插入阿拉斯加黑急流冰川下几米的主动变形的技术。最近的观测发现，在冰川最活跃的部分下面有一个4到7米的冰碛层，几乎三分之二的冰川表面运动是由于冰碛层底部几米处的作用。 在冰-冰碛物界面处存在可忽略的滑动。 在其他冰川下也观察到冰碛物，在其中许多冰川中，冰碛物可能会影响它们的流动模式。因此，发展一种研究厚的、活跃的冰碛物流动的方法是很重要的。 主要研究者将使用热水钻钻至钱柜顶部，然后使用重型潜孔锤将探头打入钱柜，并在不使用电线的情况下接收数据。 目前，还没有足够的方法来研究厚的，快速移动的冰下的冰碛物的行为。 这项研究工作将开发进行这些基本测量的方法。