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

9318121阿南达克里希南该奖项是对一个为期三年的项目的支持，该项目旨在测试一个假设，即快速冰流流动的一个控制参数是冰流河床上高摩擦力区(“粘性点”)离散区域的水文状态。以前的研究发现，快速流动的冰流B和冰流C在基本微震活动上存在巨大差异，后者在过去200年内停止流动。假设基础水系统对快速冰流下的粘性点起到了润滑作用，从而抑制了微震活动，同时又允许了快速冰流。这项实验旨在收集来自不同地点、冰流、过渡带和内陆冰上的连续宽带微震数据。***

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. ***