COLLABORATIVE RESEARCH; IPY: Ocean-Ice Interaction in the Amundsen Sea sector of West Antarctica

合作研究；

• 批准号: 0732730
• 负责人: Martin Truffer
• 金额: $ 13.9万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-10-01 至 2014-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0732730&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; IPY; Ocean; Ice

AbstractPI: Robert A. Bindschadler Proposal Number: 0732906Collaborative With: McPhee 0732804, Holland 0732869, Truffer 0732730, Stanton 0732926, Anandakrishnan 0732844 Title: Collaborative Research: IPY: Ocean-Ice Interaction in the Amundsen Sea Sector of West AntarcticaThe Office of Polar Programs, Antarctic Integrated and System Science Program has made this award to support an interdisciplinary study of the effects of the ocean on the stability of glacial ice in the most dynamic region the West Antarctic Ice Sheet, namely the Pine Island Glacier in the Amundsen Sea Embayment. The collaborative project builds on the knowledge gained by the highly successful West Antarctic Ice Sheet program and is being jointly sponsored with NASA. Recent observations indicate a significant ice loss, equivalent to 10% of the ongoing increase in sea-level rise, in this region. These changes are largest along the coast and propagate rapidly inland, indicating the critical impact of the ocean on ice sheet stability in the region. While a broad range of remote sensing and ground-based instrumentation is available to characterize changes of the ice surface and internal structure (deformation, ice motion, melt) and the shape of the underlying sediment and rock bed, instrumentation has yet to be successfully deployed for observing boundary layer processes of the ocean cavity which underlies the floating ice shelf and where rapid melting is apparently occurring. Innovative, mini ocean sensors that can be lowered through boreholes in the ice shelf (about 500 m thick) will be developed and deployed to automatically provide ocean profiling information over at least three years. Their data will be transmitted through a conducting cable frozen in the borehole to the surface where it will be further transmitted via satellite to a laboratory in the US. Geophysical and remote sensing methods (seismic, GPS, altimetry, stereo imaging, radar profiling) will be applied to map the geometry of the ice shelf, the shape of the sub ice-shelf cavity, the ice surface geometry and deformations within the glacial ice. To integrate the seismic, glaciological and oceanographic observations, a new 3-dimensional coupled ice-ocean model is being developed which will be the first of its kind. NASA is supporting satellite based research and the deployment of a robotic-camera system to explore the environment in the ocean cavity underlying the ice shelf and NSF is supporting all other aspects of this study. Broader impacts: This project is motivated by the potential societal impacts of rapid sea level rise and should result in critically needed improvements in characterizing and predicting the behavior of coupled ocean-ice systems. It is a contribution to the International Polar Year and was endorsed by the International Council for Science as a component of the "Multidisciplinary Study of the Amundsen Sea Embayment" proposal #258 of the honeycomb of endorsed IPY activities. The research involves substantial international partnerships with the British Antarctic Survey and the University of Bristol in the UK. The investigators will partner with the previously funded "Polar Palooza" education and outreach program in addition to undertaking a diverse set of outreach activities of their own. Eight graduate students and one undergraduate as well as one post doc will be integrated into this research project.

摘要PI：Robert A. Bindschadler 提案编号：0732906 合作者：McPhee 0732804、Holland 0732869、Truffer 0732730、Stanton 0732926、Anandakrishnan 0732844 标题：合作研究：IPY：西阿蒙森海区的海洋-冰相互作用南极洲 极地项目办公室、南极综合与系统科学项目颁发此奖项是为了支持一项跨学科研究，研究海洋对西南极冰盖最具活力的地区（即位于南极洲的松岛冰川）冰川冰稳定性的影响。阿蒙森海海湾。 该合作项目建立在非常成功的西南极冰盖计划所获得的知识之上，并由美国宇航局联合赞助。 最近的观测表明，该地区出现了严重的冰损失，相当于海平面持续上升的 10%。这些变化在沿海地区最为严重，并迅速向内陆传播，表明海洋对该地区冰盖稳定性的关键影响。 虽然可以使用广泛的遥感和地面仪器来表征冰表面和内部结构的变化（变形、冰运动、融化）以及底层沉积物和岩床的形状，但仪器尚未成功部署用于观察浮冰架下方洋腔的边界层过程，该洋腔明显正在快速融化。 将开发和部署可通过冰架（约 500 m 厚）钻孔下降的创新型微型海洋传感器，以在至少三年内自动提供海洋剖面信息。 他们的数据将通过冻结在钻孔中的导电电缆传输到地面，并通过卫星进一步传输到美国的实验室。 地球物理和遥感方法（地震、GPS、测高、立体成像、雷达剖面）将用于绘制冰架的几何形状、冰架下空腔的形状、冰面几何形状和冰川内部的变形。 为了整合地震、冰川和海洋观测，我们正在开发一种新的三维耦合冰海模型，这将是同类模型中的第一个。美国宇航局正在支持基于卫星的研究和部署机器人相机系统，以探索冰架下方洋腔的环境，美国国家科学基金会正在支持这项研究的所有其他方面。 更广泛的影响：该项目的动机是海平面快速上升的潜在社会影响，并且应该在表征和预测耦合海冰系统的行为方面带来急需的改进。 这是对国际极地年的贡献，并得到了国际科学理事会的认可，作为“阿蒙森海湾多学科研究”提案#258（IPY 活动蜂窝状提案）的一部分。 该研究涉及与英国南极调查局和英国布里斯托尔大学的实质性国际合作。 除了开展一系列自己的外展活动外，调查人员还将与之前资助的“Polar Palooza”教育和外展项目合作。 该研究项目将纳入八名研究生、一名本科生和一名博士后。