Collaborative Research: IPY: POLENET-Antarctica: Investigating Links between Geodynamics and Ice Sheets

合作研究：IPY：POLENET-南极洲：调查地球动力学与冰盖之间的联系

• 批准号: 0632185
• 负责人: Richard Aster
• 金额: $ 24.1万
• 依托单位: New Mexico Institute of Mining and Technology
• 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 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0632185&HistoricalAwards=false
• 关键词: Collaborative; Research; IPY; POLENET; Antarctica

Abstract This project constructs POLENET a network of GPS and seismic stations in West Antarctica to understand how the mass of the West Antarctic ice sheet (WAIS) changes with time. The information is ultimately used to predict sea level rise accompanying global warming and interpret climate change records. The GPS (global positioning system) stations measure vertical and horizontal movements of bedrock, while the seismic stations characterize physical properties of the ice/rock interface, lithosphere, and mantle. Combined with satellite data, this project offers a more complete picture of the ice sheet's current state, its likely change in the near future, and its overall size during the last glacial maximum. This data will also be used to infer sub-ice sheet geology and the terrestrial heat flux, critical inputs to models of glacier movement. As well, this project improves tomographic models of the earth's deep interior and core through its location in the Earth's poorly instrumented southern hemisphere. Broader impacts of this project are varied. The work is relevant to society for improving our understanding of the impacts of global warming on sea level rise. It also supports education at the postdoctoral, graduate, and undergraduate levels, and outreach to groups underrepresented in the sciences. As an International Polar Year contribution, this project establishes a legacy of infrastructure for polar measurements. It also involves an international collaboration of twenty four countries. For more information see IPY Project #185 at IPY.org. NSF is supporting a complementary Arctic POLENET array being constructed in Greenland under NSF Award #0632320.

摘要该项目构建了Polenet在南极西部的GPS和地震站网络，以了解南极冰盖（WAIS）的质量如何随着时间而变化。该信息最终用于预测全球变暖和解释气候变化记录的海平面上升。 GPS（全球定位系统）站点测量基岩的垂直和水平运动，而地震站则表征了冰/岩石界面，岩石圈和地幔的物理特性。结合卫星数据，该项目提供了更完整的冰盖当前状态，可能在不久的将来发生变化以及其在最后一次冰川最大值中的整体大小。该数据还将用于推断亚冰片地质和地面热通量，冰川运动模型的关键输入。同样，该项目通过其在地球仪器不佳的南半球中的位置来改善地球深内部和核心的层析成像模型。 该项目的更广泛的影响各不相同。这项工作与社会有关，以提高我们对全球变暖对海平面上升的影响的理解。它还支持博士后，研究生和本科级别的教育，并向科学中的人数不足。作为国际极性年的贡献，该项目建立了极地测量的基础设施的遗产。它还涉及二十四个国家的国际合作。有关更多信息，请参见ipy.org的IPY项目＃185。 NSF支持在格陵兰岛根据NSF Award＃0632320建造的互补Polenet阵列。