Mechanics of Ice Stream Margins

冰流边缘的力学

• 批准号: 9118703
• 负责人: Charles Raymond
• 金额: $ 6.52万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-05-15 至 1994-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9118703&HistoricalAwards=false
• 关键词: Mechanics; Ice; Stream; Margins

This award supports a project to develop a coupled thermo mechanical model for margins of ice streams of the type draining the West Antarctic Ice Sheet (WAIS). This model will provide a theoretical framework for interpreting measurements of velocity and ice temperature in ice stream margins in terms of changes in basal sliding behavior and ice flow law across the margin. This work will allow the investigation of the possible controls on the positions of ice stream margins, with particular emphasis on the stability of a boundary between a frozen and a wet bed. Since the width of ice streams affects the discharge of inland ice through the ice streams into the ocean, an understanding of ice stream margins is fundamental to understanding the mass balance of the West Antarctic Ice Sheet, how it might change in the future, and what impact it could have on global sea level.

该奖项支持一个项目，为排干西南极冰盖(WAIS)类型的冰流边缘开发一个耦合的热力学模型。该模型将提供一个理论框架，用于根据冰流边缘基本滑动行为和冰流流动规律的变化来解释冰流边缘的速度和冰温测量结果。这项工作将使对冰流边缘位置的可能控制进行调查，特别侧重于冰床和湿床之间边界的稳定性。由于冰流的宽度影响内陆冰通过冰流排入海洋，因此了解冰流边缘对于了解西南极冰盖的物质平衡、它未来可能如何变化以及它可能对全球海平面产生什么影响是至关重要的。