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合作伙伴：McPhee 0732804，Holland 0732869，Truffer 0732730，Stanton 0732926，Anandakrishnan 0732844标题：合作研究：IPY：西舌提卡阿蒙森海区的海洋-冰相互作用极地计划办公室，南极综合和系统科学计划授予该奖项，以支持海洋对最具活力的西南极冰盖地区冰川冰稳定性的影响的跨学科研究，即阿蒙森海湾的松岛冰川。 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基础上，并与美国宇航局联合赞助。 最近的观测表明，该地区的冰损失相当大，相当于海平面上升的10%。这些变化沿着海岸最大，并迅速向内陆传播，表明海洋对该地区冰盖稳定性的重要影响。 虽然可以利用各种遥感和地面仪器来确定冰表面和内部结构（变形、冰的运动、融化）的变化以及下面的沉积物和岩床的形状，但还没有成功地利用仪器来观测浮冰架下面的海洋空腔的边界层过程，因为那里显然正在发生快速融化。 将开发和部署创新的微型海洋传感器，这些传感器可以通过冰架上的钻孔（约500米厚）下降，以便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，然后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、全球定位系统、测高、立体成像、雷达剖面）将用于绘制冰架的几何形状、冰架下空洞的形状、冰表面的几何形状和冰川冰内的变形。 为了综合地震、冰川学和海洋学观测，正在开发一个新的三维冰-海耦合模型，这将是第一个此类模型。NASA正在支持基于卫星的研究和机器人相机系统的部署，以探索冰架下的海洋洞穴环境，NSF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，并应导致迫切需要的改进，表征和预测耦合海洋冰系统的行为。 这是对国际极地年的贡献，并得到国际科学理事会的核可，作为国际极地年核可活动蜂巢中“阿蒙森海湾多学科研究”第258号提案的一个组成部分。 这项研究涉及与英国南极调查局和英国布里斯托大学的大量国际合作。 调查人员将与以前资助的“极地狂欢节”教育和推广计划合作，除了开展自己的一系列推广活动。 八名研究生和一名本科生以及一名博士后将被整合到这个研究项目。