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

建议编号：0732906合作伙伴：McPhee 0732804，Holland 0732869，Truffer 0732730，Stanton 0732926，Anandakrishnan 0732844标题：合作研究：国际冰联：南极西部阿蒙森海区的海-冰相互作用南极极地方案办公室，南极综合与系统科学计划，颁发这一奖项是为了支持一项关于海洋对最活跃地区冰川稳定性影响的跨学科研究，该冰盖是西南极冰盖，即阿蒙森海海湾的松岛冰川。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的基础上，并与美国国家航空航天局联合发起。最近的观察表明，该地区的冰层显著减少，相当于海平面持续上升的10%。这些变化沿海岸最大，并迅速向内陆传播，表明海洋对该地区冰盖稳定的关键影响。虽然有广泛的遥感和陆基仪器可用来表征冰表面和内部结构(变形、冰运动、融化)的变化以及下伏沉积物和岩床的形状，但还没有成功地部署仪器来观测漂浮冰架下的海洋空洞的边界层过程，那里显然正在发生快速融化。创新的微型海洋传感器可以通过冰架上的钻孔(约500米厚)降下来，将被开发和部署，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井眼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一个实验室。将应用地球物理和遥感方法(地震、全球定位系统、测高、立体成像、雷达剖面图)绘制冰架的几何形状、冰架下洞穴的形状、冰面几何形状和冰川冰内的变形。为了综合地震、冰川和海洋观测，正在开发一种新的三维冰海耦合模型，这将是此类模型中的第一个。NASA正在支持基于卫星的研究和机器人相机系统的部署，以探索冰架下海洋洞穴的环境，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迅速上升的潜在社会影响，并应在描述和预测海冰耦合系统的行为方面产生迫切需要的改进。这是对国际极地年的一项贡献，并得到国际科学理事会的认可，将其作为“阿蒙森海居所多学科研究”建议的258号提案的组成部分，该建议是已批准的国际极地年活动的蜂巢。这项研究涉及与英国南极调查局和英国布里斯托尔大学的大量国际合作。调查人员除了自己开展一系列不同的外展活动外，还将与之前资助的“极地帕鲁萨”教育和外展计划合作。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中。

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.