Collaborative Research: Subglacial Controls on Greenland Ice Sheet Marginal Acceleration

合作研究：冰下对格陵兰冰盖边际加速度的控制

• 批准号: 0909454
• 负责人: Ginny Catania
• 金额: $ 34.48万
• 依托单位: University of Texas at Austin
• 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: 2009-10-01 至 2013-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0909454&HistoricalAwards=false
• 关键词: Collaborative; Research; Subglacial; Controls; Greenland

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).Funds are provided to examine the nature and cause of short-term ice sheet velocity changes. The work field would occur near Swiss Camp, Greenland and focus on the interactions between the ice sheet, the atmosphere and the bed through an integrated observational approach which involves borehole geo- physics, surface-based GPS and modeling. The PIs propose to: (1) measure changes in the subglacial water system over the summer season using borehole water pressure transducers; (2) measure the ice sheet response to changes in basal conditions with surface-based GPS and measured rates of borehole deformation; (3) measure englacial and basal temperatures for input into flow models and to constrain estimates of ice deformation and; (4) correlate these data to melt and surface water volume proxies based on remote sensing data and meteorological data available from GC-Net and measured lake volume. The PIs intend to collaborate with Drs. Martin Funk and Martin Luthi, who have submitted a proposal to the Swiss Nation Science Foundation.

该奖项是根据《2009年美国复苏和再投资法案》(公法111-5)资助的，旨在研究短期冰盖速度变化的性质和原因。工作场地将在格陵兰岛的瑞士营地附近进行，重点是通过综合观测方法研究冰盖、大气和海床之间的相互作用，其中包括钻孔地球物理、地面全球定位系统和建模。投资促进机构建议：(1)使用钻孔水压传感器测量夏季冰川下水系统的变化；(2)利用地面全球定位系统和测量的钻孔变形速率，测量冰盖对基本条件变化的反应；(3)测量冰川温度和基础温度，以便输入流动模型，并限制对冰变形的估计；(4)根据遥感数据以及GC-Net提供的气象数据和测量的湖泊体积，将这些数据与融化和地表水体积指标相关联。私人投资公司打算与马丁·芬克和马丁·卢蒂博士合作，他们已经向瑞士国家科学基金会提交了一份提案。