Model Investigation of Ice Stream/Subglacial Lake Systems

冰流/冰下湖系统模型研究

• 批准号: 0838811
• 负责人: Olga Sergienko
• 金额: $ 37.55万
• 依托单位: Princeton University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-07-15 至 2013-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0838811&HistoricalAwards=false
• 关键词: Model; Investigation; Ice; Stream; Subglacial

Sergienko/0838811 This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).This award supports a project to conduct a modeling study of the ice stream ? sub-glacial water system. A suite of numerical models of various dimensionality and complexity will be constructed in a sequential, hierarchical fashion to formulate and test hypotheses regarding how sub-glacial lakes form under ice streams, determine the effect of sub-glacial lakes on ice-stream flow and mass balance, and to determine feedback effects whereby the ice stream ? sub-glacial water system can elicit both stable and unstable responses to environmental perturbations. This research will address one of the only observationally verified fast-time-scale processes apparent within the Antarctic Ice Stream system. The intellectual merit of the project is that understanding the origins and consequences of near-grounding-line sub-glacial lakes is a priority in glaciological research designed to predict short-term variations in Antarctica?s near-term future mass balance. The broader impacts of the proposed work are that it will contribute to better understanding of a system that has important societal relevance through contribution to sea level rise. Participation of a graduate student in the project will provide the student?s training and education in application of the numerical modeling in geosciences.

Sergienko/0838811该奖项是根据2009年《美国复苏和再投资法案》(公法第111-5条)资助的。该奖项支持一个对冰流进行模型研究的项目？次冰川水系。一套不同维度和复杂性的数值模型将以顺序、分级的方式构建，以阐明和检验有关冰下湖泊如何在冰流下形成的假设，确定冰下湖泊对冰流流动和物质平衡的影响，并确定冰流？冰下水系统对环境扰动既有稳定的反应，也有不稳定的反应。这项研究将讨论南极冰流系统中唯一经观测证实的快速时间尺度过程之一。该项目的学术价值在于，了解近地线冰下湖泊的起源和后果是冰川学研究的优先事项，该研究旨在预测南极洲的短期变化-S近期未来的物质平衡。拟议工作的更广泛影响是，它将有助于更好地了解通过对海平面上升作出贡献而具有重要社会意义的系统。研究生的参与将为S在地学中应用数值模拟提供培训和教育。