Rift-Zone Dynamics Between Byrd Glacier and the Ross Ice Shelf

这个奖项是为了支持伯德的相互作用的研究 冰川与罗斯冰架，注意力集中在 浮冰流舌的横向断裂带嵌入在 冰架 现场数据将包括冰海拔和 用雷达探测绘制的厚度和绘制的冰速度 从摄影学上来说 表面应变率将根据以下公式计算： 速度数据。 有限元建模将研究两个 裂谷带动力学方面;裂谷带的应力场 对于给定的蠕变和断裂流变学以及温度场， 从东南极冰分水岭开始， 止于罗斯冰架的裂冰前缘 这项研究的意义在于，它将提供一个 用于量化伯德支撑的基于物理的方法 罗斯冰架（Ross Ice Shelf） 开发的模型将具有 经适当修改后应用于其他冰流 进入罗斯冰架，并将有助于了解 动态过程沿着任何流带，具有片流，流， 流和货架流组件。

This award is in support of the study of the interaction of Byrd Glacier with the Ross Ice Shelf, with attention focused on the lateral rift zones of the floating ice stream tongue embedded in the ice shelf. Field data will consist of ice elevations and thicknesses mapped by radar sounding and ice velocities mapped photogrammetrically. Surface strain rates will be computed from the velocity data. Finite-element modeling will investigate two aspects of rift-zone dynamics; the stress field in the rift zone for given creep and fracture rheologies and the temperature field in a flowband that begins at the East Antarctic ice divide and ends at the calving front of the Ross Ice Shelf. The significance of this research is that it will provide a physically based means for quantifying the buttressing of Byrd Glacier by the Ross Ice Shelf. The models developed will have applications, with appropriate modifications, to other ice streams entering the Ross Ice Shelf, and will be useful in understanding dynamic processes along any flowband that has sheet-flow, stream- flow, and shelf-flow components.