Radar Studies of Internal Stratigraphy and Bedrock Topography along the US ITASE Traverse

该奖项支持国际横贯南极科学考察队(US ITASE)美国部分导线沿线内部地层和基岩地形的雷达研究计划。该雷达将提供现场可立即获得的有关冰层厚度和内部层结构的信息，以帮助在导线测量进行时选择核心位置。这些数据还将有助于以较少的频率间隔沿导线布设较深的千年尺度岩心，并有助于选择未来计划的内陆深处岩芯的位置。除了沿导线路线连续覆盖外，还将对每个核心位置周围的网格进行更详细的研究，以更好地描述每个区域的堆积和基岩地形。这项建议是对寒冷地区研究和工程实验室(CRREL)提交的建议的补充，后者建议使用一种高频雷达来检查记录的较浅部分，包括近地表裂缝的存在。这里提出的雷达在60米以下的深度是最敏感的，可以描绘出深厚的基岩和内部层，甚至到冰层厚度的很大一部分。

This award supports a program of radar studies of internal stratigraphy and bedrock topography along the traverses for the U.S. component of the International Trans-Antarctic Scientific Expedition (US ITASE). The radar will provide information immediately available in the field on ice thickness and internal layer structure to help in the selection of core sites as the traverse proceeds. These data will also be useful in siting deeper millennial scale cores planned at less frequent intervals along the traverse, and in the selection of the location for the deep inland core planned for the future. In addition to continuous coverage along the traverse route, more detailed studies on a grid surrounding each of the core locations will be made to better characterize accumulation and bedrock topography in each area. This proposal is complimentary to the one submitted by the Cold Regions Research and Engineering Laboratory (CRREL), which proposes a high frequency radar to examine the shallower portion of the record down to approximately 60 meters, including the presence of near-surface crevasses. The radar proposed herein is most sensitive at depths below 60 meters and can depict deep bedrock and internal layers to a substantial fraction of the ice thickness.