Microearthquake Monitoring of Ice Stream C, West Antarctica: A Sensor for Sticky Spots

南极洲西部冰流 C 的微地震监测：粘点传感器

• 批准号: 9318121
• 负责人: Sridhar Anandakrishnan
• 金额: $ 31.67万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-04-01 至 1998-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9318121&HistoricalAwards=false
• 关键词: Microearthquake; Monitoring; Ice; Stream; West

9318121 Anandakrishnan This award is for support for a three year project to test the hypothesis that a controlling parameter of fast ice-stream flow is the hydrologic state of discrete zones of high friction ("sticky spots") at the bed of the ice streams. Previous work has discovered an enormous difference in basal microearthquake activity between fast-flowing ice stream B and ice stream C, which stopped flowing within the last 200 years. It is hypothesized that the basal water system is lubricating the sticky spots under the fast ice stream and thus inhibiting microearthquake activity, and at the same time permitting fast ice flow. This experiment is intended to collect a continuous record of wide-bandwidth microearthquake data from a variety of sites, on the ice streams, in the transition zone, and on the inland ice. ***

9318121 Anandakrishnan该奖项是为了支持一个为期三年的项目，以测试快速冰流流动的控制参数是冰流床处高摩擦离散区（“粘点”）的水文状态的假设。 先前的研究发现，快速流动的冰流B和在过去200年内停止流动的冰流C之间的基础微地震活动存在巨大差异。 据推测，基底水系统润滑了快速冰流下的粘性点，从而抑制了微地震活动，同时允许快速冰流。 这个实验的目的是收集一个连续记录的宽带微震数据从不同的网站，在冰流，在过渡区，并在内陆冰。 ***