Collaborative Research: POLENET-Antarctica: Investigating Links Between Geodynamics and Ice Sheets - Phase 2

合作研究：POLENET-南极洲：调查地球动力学和冰盖之间的联系 - 第二阶段

• 批准号: 1419268
• 负责人: Richard Aster
• 金额: $ 34.91万
• 依托单位: Colorado State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-01-01 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1419268&HistoricalAwards=false
• 关键词: Collaborative; Research; POLENET; Antarctica; Investigating

Intellectual Merit: The PIs propose to continue and expand GPS and seismic for ANET-POLENET Phase 2 to advance understanding of geodynamic processes and their influence on the West Antarctic Ice Sheet. ANET-POLENET science themes include: 1) determining ice mass change since the last glacial maximum, including modern ice mass balance; 2) solid earth influence on ice sheet dynamics; and 3) tectonic evolution of West Antarctica and feedbacks with ice sheet evolution. Nine new remote continuous GPS stations, to be deployed in collaboration with U.K. and Italian partners, will augment ANET-POLENET instrumentation deployed during Phase 1. Siting is designed to better constrain uplift centers predicted by GIA models and indicated by Phase 1 results. ANET-POLENET Phase 2 builds on Phase 1 scientific, technological, and logistical achievements including 1) seismic images of crust and mantle structure that resolve the highly heterogeneous thermal and viscosity structure of the Antarctic lithosphere and underlying mantle; 2) newly identified intraplate glacial, volcanic, and tectonic seismogenic processes; 3) improved estimates of intraplate vertical and horizontal crustal motions and refinement of the Antarctic GPS reference frame; and 4) elucidation of controls on glacial isostatic adjustment-induced crustal motions due to laterally varying earth structure. The PIs present a nominal plan to reduce ANET by approximately half to a longer-term community "backbone network" in the final 2 years of this project. Broader impacts: Monitoring and understanding mass change and dynamic behavior of the Antarctic ice sheet using in situ GPS and seismological studies will help improve understanding of how Antarctic ice sheets respond to a warming world and how will this response impacts sea-level and other global changes. Seismic and geodetic data collected by the backbone ANET-POLENET network are openly available to the scientific community. ANET-POLENET is integral in the development and realization of technological and logistical innovations for year-round operation of instrumentation at remote polar sites, helping to advance scientifically and geographically broad studies of the polar regions. The ANET-POLENET team will establish a training initiative to mentor young polar scientists in complex, multidisciplinary and internationally collaborative research. ANET-POLENET will continue the broad public outreach to the public about polar science through the polenet.org website, university lectures, and K-12 school visits. This research involves multiple international partners.

知识分子的优点：PIS提议继续并扩大Anet-Polenet第2阶段的GPS和地震，以促进对地球动力学过程的理解及其对西南极冰盖的影响。 Anet-Polenet科学主题包括：1）自上次冰川最大值以来确定冰块变化，包括现代冰质量平衡； 2）地球对冰盖动力学的影响； 3）西南极西部的构造演化和冰盖进化的反馈。将与英国和意大利合作伙伴合作部署的九个新的远程连续GPS站将增加在第1阶段部署的Anet-Polenet仪器。位置旨在更好地限制GIA模型预测的提升中心，并由第1阶段结果指示。 Anet-Polenet第2阶段建立在第1阶段的科学，技术和后勤成就上，包括1）地壳和地幔结构的地震图像，这些图像可以解决南极岩石圈以及基础地幔的高度异质的热和粘度结构； 2）新鉴定的冰川内冰川，火山和构造地震生成过程； 3）改进了板岩内垂直和水平地壳运动的估计以及南极GPS参考框架的细化； 4）由于横向变化的地球结构而导致的冰川等静态调节引起的地壳运动的对照阐明。 PI提出了一个名义计划，将ANET减少到该项目的最后两年中的长期社区“骨干网络”。更广泛的影响：使用原位GP和地震学研究监测和理解南极冰盖的质量变化和动态行为将有助于提高人们对南极冰盖如何对温暖世界的反应以及这种反应如何影响海平面和其他全球变化的理解。科学界公开使用骨干臂螺旋网络收集的地震和大地测量数据。 Anet-Polenet在技术和后勤创新的开发和实现中是远程极地仪器全年运行的技术和后勤创新的重要组成部分，有助于对极地地区进行科学和地理广泛的研究。 Anet-Polenet团队将制定一项培训计划，以指导年轻的极地科学家进行复杂，多学科和国际协作研究。 Anet-Polenet将通过Polenet.org网站，大学讲座和K-12学校访问继续向公众开展广泛的公众公开展览。这项研究涉及多个国际合作伙伴。