CAREER: Teaching Old Data New Tricks: Leveraging Legacy Field Data to Investigate Ice-stream Shut down and Inspire a New Generation of Cryospheric Scientists

南极冰流和出口冰川是冰川冰从大陆内部流向海洋的主要通道，而海洋的净冰损失导致全球海平面上升。任何加速或减缓这些冰流移动速度的过程都会明显影响南极洲冰的增加和减少之间的平衡，对世界各地的沿海社区都有重要影响。可以导致冰流加速的过程经常被研究，而最近一次发生在180年前的南极洲的冰流停滞却很少被研究。这个项目将利用20年来南极正在减速的冰流现场实验的现有数据。该团队将利用现代地球物理方法重新处理来自五个不同的nsf资助项目的数据集，以建立长时间序列的观测结果，从而深入了解冰盖的过程，并测试关于停滞如何发生的假设。与此同时，该团队将利用现有的实地经验数据开发独特的沉浸式学习模块，为下一代STEM学生提供体验南极实地工作的无障碍机制。最后，这一职业奖将通过建立和主办年度地区性科罗拉多冰川学会议，为冰川学界的不同研究人员提供新的途径，该会议将把社区大学的教育工作者和当地冰川学研究人员联系起来，以交流思想，发展合作，并宣传机会。过去四分之一世纪的研究表明，南极洲西部的惠兰斯冰流可能会在21世纪中期停滞，但导致停滞的过程在很大程度上仍然只是粗略的、理想化的术语。该项目将利用13年的连续全球定位系统数据和29年的地震数据来询问冰流减速和停滞过程。多年代际数据集将显示冰流的粘滑运动演变、长期和空间变化的冰厚趋势以及冰下湖活动。这些数据将用于探索冰流/冰下水文动力学耦合如何导致最终停滞。除了科学调查外，该团队还将确保未处理的遗留油田数据的长期存档，以支持后代将新技术应用于过去数据集的能力。该项目将为科罗拉多社区学院系统的学生提供研究经验，并将开发三个教育模块，使用低成本的沉浸式技术，以激励和促进从六年级到研究生院的学生以及公众的冰盖科学。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

Antarctic ice streams and outlet glaciers are the primary conduits of glacier ice from the interior of the continent to the ocean, where net ice loss contributes to global sea-level rise. Any process that speeds up or slows down the rate at which these ice streams move can appreciably impact the balance between ice gain and loss in Antarctica, with important implications for coastal communities worldwide. Processes that can lead to ice-stream acceleration are frequently studied, whereas ice-stream stagnation, which most recently occurred in Antarctica about 180 years ago, is studied less often. This project will leverage two decades of existing data from field experiments in Antarctica on a decelerating ice stream. The team will re-process these datasets from five different NSF-funded projects using modern geophysical methods to build long time-series of observations that provide insight into ice-sheet processes and test hypotheses about how stagnation occurs. In parallel, the team will leverage existing experiential field data to develop unique immersive learning modules to provide an accessible mechanism for the next generation of STEM students to experience Antarctic field work. Finally, this CAREER award will support a new pathway for a diverse cohort of researchers in the glaciology community by establishing and hosting annual regional Colorado Glaciology meetings that will connect community college educators and local glaciology researchers to exchange ideas, develop collaborations, and advertise opportunities. Over a quarter century of previous work has proposed that Whillans Ice Stream, West Antarctica, may stagnate by the mid-21st century, yet the processes that drive stagnation are still largely considered only in coarse, idealized terms. This project will leverage 13 years of continuous Global Positioning System data and 29 years of seismic data to interrogate ice-stream deceleration and stagnation processes. The multi-decadal datasets will indicate the evolution of stick-slip motion of the ice stream, long-term and spatially varying ice-thickening trends, and subglacial lake activity. These data will be used to explore how coupled ice-stream/subglacial-hydrology dynamics may lead to ultimate stagnation. In addition to the scientific investigations, the team will ensure the long-term archiving of unprocessed legacy field data to support the ability of future generations to apply novel techniques to past datasets. This project will include research experiences for students from the Colorado community college system and will develop three educational modules using low-cost immersive technologies to inspire and promote ice-sheet science to students from 6th grade to graduate school as well as the public.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.