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 该项目在南极洲西部构建了一个由 GPS 和地震站组成的 POLENET 网络，以了解南极洲西部冰盖 (WAIS) 的质量如何随时间变化。这些信息最终用于预测伴随全球变暖的海平面上升并解释气候变化记录。 GPS（全球定位系统）站测量基岩的垂直和水平运动，而地震站则表征冰/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、近期可能发生的变化以及末次盛冰期的总体尺寸的图像。这些数据还将用于推断冰下地质和陆地热通量，这是冰川运动模型的关键输入。此外，该项目还通过其位于地球仪器匮乏的南半球的位置，改进了地球深层内部和核心的层析成像模型。 该项目的更广泛影响是多种多样的。这项工作与社会相关，有助于提高我们对全球变暖对海平面上升影响的理解。它还支持博士后、研究生和本科生的教育，以及对科学领域代表性不足的群体的推广。作为国际极地年的贡献，该项目建立了极地测量基础设施的遗产。它还涉及二十四个国家的国际合作。有关更多信息，请参阅 IPY.org 上的 IPY 项目 #185。 NSF 正在支持在格陵兰岛根据 NSF 奖 #0632320 建造一个互补的北极 POLENET 阵列。