Laurentide Ice Sheet Thermal Instability Modeling

劳伦泰冰盖热不稳定性建模

• 批准号: 9870875
• 负责人: Douglas MacAyeal
• 金额: $ 18.68万
• 依托单位: University of Chicago
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-09-15 至 2001-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9870875&HistoricalAwards=false
• 关键词: Laurentide; Ice; Sheet; Thermal; Instability

Abstract ATM-9870886 Alley, Richard B. Pennsylvania State University Title: Laurentide Thermal Instability Modeling This award supports collaborative research at the University of Chicago and Pennsylvania State University designed to develop a suite of finite-element ice-sheet models to study the role of ice sheets in millennial-scale climate change observed in the geologic record. The main focus of the research will be to understand how thermal instability (i.e., switching from frozen to melted conditions at the glacial bed) leads to ice-stream and ice-lobe activity that interacts strongly with the surrounding environment, either as an amplifier of externally forced climate change or as an instigator of climate change in the atmosphere and ocean. Model experiments will attempt to resolve the controversy as to whether the cause of Heinrich events and Bond/Lotti events is this thermal triggering mechanism or is the climate cooling seen in the Greenland ice-core records.

摘要 ATM-9870886 Alley, Richard B. 宾夕法尼亚州立大学 标题：Laurentide 热不稳定性建模 该奖项支持芝加哥大学和宾夕法尼亚州立大学的合作研究，旨在开发一套有限元冰盖模型来研究地质记录中观察到的千年尺度气候变化中的冰盖。 研究的主要重点将是了解热不稳定性（即，在冰川床上从冻结条件转变为融化条件）如何导致冰流和冰瓣活动与周围环境强烈相互作用，或者作为外部强迫的气候变化或作为大气和海洋气候变化的煽动者。 模型实验将试图解决海因里希事件和邦德/洛蒂事件的原因是这种热触发机制还是格陵兰冰芯记录中看到的气候变冷的争议。