Collaborative Research: Ice and Rock Processes in Cirques

合作研究：冰斗中的冰和岩石过程

• 批准号: 0518608
• 负责人: Kurt Cuffey
• 金额: --
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-09-01 至 2008-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0518608&HistoricalAwards=false
• 关键词: Collaborative; Research; Ice; Rock; Processes

Cirque glaciers are sensitive to climate change and offer unique opportunitiesfor studying fundamental aspects of glacial mechanics. Erosion by these glaciers and the coupled response of adjacent hillslopes govern the long-term evolution ofbedrock topography in the divide regions of alpine orogens and contributesediment into major drainage networks. This project will acquire newmeasurements of ice flow, microclimate, rock topography, and sediment flux attwo cirques in the western North American Cordillera. Data will be interpretedwith numerical and conceptual models to constrain the force balance partitioningand basal motion distribution of the glaciers, to identify the primary controlson rock flux, and to establish a baseline of topographic measurement on cirqueheadwalls for longer-term investigations. The project is a step toward achievinga general understanding of flow and stress regimes of glaciers in cirques, andtoward building process-based transport relationships between rock mass flux fromcirques and topographic, lithologic, and climatic variables.

冰斗冰川对气候变化很敏感，为研究冰川力学的基本方面提供了独特的机会。 这些冰川的侵蚀和相邻山坡的耦合响应控制着高山造山带分水岭地区基岩地形的长期演变，并为主要的排水网络提供沉积物。 该项目将在北美科迪勒拉山脉西部的两个冰斗获得冰流、小气候、岩石地形和沉积物通量的新测量结果。 将用数值和概念模型解释数据，以约束冰川的力平衡分配和基底运动分布，确定岩石通量的主要控制因素，并为长期调查建立冰斗顶壁地形测量的基线。 该项目是对冰斗中冰川流动和应力状态的一般理解的一步，也是对建立冰斗岩体通量与地形、岩性和气候变量之间基于过程的传输关系的一步。