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

美国 ITASE 横断线沿线内部地层和基岩地形的雷达研究

• 批准号: 9814574
• 负责人: Robert Jacobel
• 金额: $ 39.24万
• 依托单位: Saint Olaf College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-04-01 至 2005-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9814574&HistoricalAwards=false
• 关键词: Radar; Studies; Internal; Stratigraphy; Bedrock

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.

该奖项支持国际跨南极科学考察（US ITASE）美国部分的内部地层和基岩地形沿着雷达研究计划。 雷达将提供现场立即可用的冰厚和内层结构信息，以帮助在穿越过程中选择核心位置。 这些数据也将有助于定位更深的千年尺度核心计划在较低的间隔沿着导线，并在选择的位置，为未来计划的深内陆核心。 除了沿着导线路线的连续覆盖外，还将对每个岩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。 该提案是对寒冷地区研究与工程实验室（CRREL）提交的提案的补充，该提案建议使用高频雷达来检查记录的较浅部分，深度约为60米，包括近地表裂缝的存在。 本文提出的雷达在60米以下的深度是最敏感的，可以描绘深基岩和内部层的冰厚度的很大一部分。