Ground Ice Dynamics in Hyperarid Soils of the McMurdo Dry Valleys, Antarctica

南极洲麦克默多干谷超干旱土壤中的地冰动力学

• 批准号: 0636998
• 负责人: Ronald Sletten
• 金额: $ 42.91万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-15 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0636998&HistoricalAwards=false
• 关键词: Ground; Ice; Dynamics; Hyperarid; Soils

This project studies subsurface ice in the McMurdo Dry Valleys of Antarctica, modeling their origin based on field, laboratory, and theoretical work. These ices are highly unusual in that given the shallow occurrence and hyperarid conditions they should have sublimed away, but appear to have existed for many millions of years. The ices are important in that they may provide unique paleoclimate information, insight into the physical behavior of soils in these extreme environments, and provide an analogue for primary Martian processes. The broader impacts are undergraduate and graduate student education. The results may also contribute to understanding recent global climate change.

本项目研究南极洲麦克默多干谷的地下冰，根据实地、实验室和理论工作对其起源进行建模。这些冰是非常不寻常的，因为考虑到浅层的出现和极度干旱的条件，它们应该升华了，但似乎已经存在了数百万年。这些冰很重要，因为它们可以提供独特的古气候信息，深入了解这些极端环境下土壤的物理行为，并提供火星原始过程的类似物。更广泛的影响是本科生和研究生教育。这些结果也可能有助于理解最近的全球气候变化。