U.S.-U.K. Collaborative Research: Theoretical Physics of Deformable Glacier Beds

美英合作研究：可变形冰川床的理论物理

• 批准号: 8722253
• 负责人: Joseph Walder
• 金额: $ 1.06万
• 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: 1988
• 资助国家: 美国
• 起止时间: 1988-03-15 至 1990-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8722253&HistoricalAwards=false
• 关键词: U.S.; U.K.; Collaborative; Research; Theoretical

This award will support collaborative research between Dr. Joseph Walder, Department of Geological Sciences, University of Washington and Dr. Andrew Fowler, Mathematical Institute, Oxford University, U.K. Recent developments in glaciology have led to the recognition that deformable glacier beds may play a significant, if not dominant, role in glacier dynamics. Nonetheless, our understanding of the interactions between glacier ice, rock debris at or near the glacier sole, and subglacial meltwater remains incomplete. The proposed research project will focus on aspects of the physics of deformable glacier beds, particularly the links between subglacial hydrology, bed deformation, and glacier motion. There are three parts to the proposed theoretical work: 1) Modelling of till movement over rough beds 2) Modelling the influence of ice penetration into subglacial sediments on deformation of such sediments and 3) Modelling stability of subglacial meltwater conduits on beds of deformable sediment. Dr. Fowler has made significant contributions to theoretical geology in recent years and his mathematical expertise will be valuable in pointing out approximate analytical techniques involved in the proposed research. This project may lead to significant advances in understanding the physics of the complicated zone of interacting ice, rock debris and meltwater at the soles of many glaciers. Because of the growing recognition by glaciologists that glacier dynamics can be controlled by this complicated basal zone, research on this topic is very timely and important.

该奖项将支持华盛顿大学地质科学系 Joseph Walder 博士和英国牛津大学数学研究所 Andrew Fowler 博士之间的合作研究。冰川学的最新发展使人们认识到可变形冰川床可能发挥着重要作用。即使不是主导性的，也会在冰川动力学中发挥作用。 尽管如此，我们对冰川冰、冰川底部或附近的岩石碎片以及冰下融水之间相互作用的理解仍然不完整。 拟议的研究项目将重点关注可变形冰川床的物理学方面，特别是冰下水文学、床变形和冰川运动之间的联系。 拟议的理论工作分为三个部分：1）模拟粗糙床上的耕作运动；2）模拟冰渗透到冰下沉积物对此类沉积物变形的影响；3）模拟可变形沉积物床上冰下融水管道的稳定性。 近年来，福勒博士对理论地质学做出了重大贡献，他的数学专业知识对于指出拟议研究中涉及的近似分析技术非常有价值。 该项目可能会在理解许多冰川底部的冰、岩石碎片和融水相互作用的复杂区域的物理学方面取得重大进展。 由于冰川学家越来越认识到冰川动力学可以由这个复杂的基底带控制，因此对这一主题的研究非常及时和重要。