Collaborative Research: GreenFjord-FIBER, Observing the Ice-Ocean Interface with Exceptional Resolution

合作研究：GreenFjord-FIBER，以卓越的分辨率观测冰海界面

• 批准号: 2338502
• 负责人: Bradley Lipovsky
• 金额: $ 49.77万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-04-15 至 2027-03-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2338502&HistoricalAwards=false
• 关键词: Collaborative; Research; GreenFjord; FIBER; Observing

The GreenFjord-FIBER project is a scientific study that uses high-tech measurements to understand how Greenlandic glaciers flowing into the ocean change between winter and summer. The investigators are focusing on the points where the ice meets the ocean. With special sensors measuring vibrations and temperature, the investigators aim to measure where and when icebergs detach from the glacier and fall into the ocean. The investigators also want to find out where warm ocean water is melting the ice and if there is a connection to the speed at which the glacier flows into the ocean. The measurements will help us learn more about how Greenland's glaciers will change in the future and what that might mean for sea levels around the world. In collaboration with a local Greenlandic teacher-trainee, the scientific results of the study and their implications for local communities will be disseminated in Greenland’s classrooms.The proposal aims to test the hypothesis that a regime change in melt source regions occurs during the spring-to-summer transition period, shifting from temperature-dominated melt and calving to sub-glacial discharge-dominated processes. To test this hypothesis, the investigators will deploy a new optical fiber instrument at the calving front of the Qajuuttap Sermia tidewater glacier in Greenland. This instrument will measure acoustic and temperature data to better understand the effect of sub-glacial melt and discharge on calving. The project will generate novel measurements from Distributed Temperature Sensing (DTS) and Distributed Acoustic Sensing (DAS) systems, making a compelling proof-of-concept for glacier-ocean interface observations, an environment that is notoriously treacherous for equipment and personnel. The inclusion of broadband instruments on land, seismometers on the ocean bottom, and conductivity, temperature, and depth (CTD) casts from boats will provide important benchmarks against the measurements from DTS/DAS. The project will support two early-career researchers, one postdoc, and an undergraduate in a University of Washington hosted summer research program. In collaboration with a local Greenlandic teacher-trainee, the scientific results of the study and their implications for local communities will be disseminated in Greenland’s classrooms.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.

Greenfjord-Fiber项目是一项科学研究，它使用高科技测量值来了解格陵兰冰川如何流入冬季和夏季之间的海洋变化。调查人员将重点放在冰与海洋相遇的地方。通过测量振动和温度的特殊传感器，研究人员旨在测量冰山从冰川脱离冰川并落入海洋的地方。调查人员还想找出温暖的海水在哪里融化冰，以及冰川流入海洋的速度是否有联系。这些测量将帮助我们进一步了解格陵兰岛的冰川将来将如何变化以及这对世界各地的海平面可能意味着什么。通过与当地的格陵兰教师培训者合作，该研究的科学结果及其对当地社区的影响将在格陵兰教室中分配。该提案旨在检验熔体源区域的政权变化在春季到萨默尔过渡期间发生的熔体源区域的变化，从而从温度下的梅尔特和平静的流量降低到下层过分的过程，并转移到了较高的静止过程中。为了检验这一假设，研究人员将在格陵兰岛的Qajuuttap Sermia Tidewater冰川的产犊前部部署一种新的光纤仪器。该仪器将测量声学和温度数据，以更好地了解亚冰川熔体和排放对产犊的影响。该项目将通过分布式温度传感（DTS）和分布式声传感（DAS）系统产生新的测量，从而为冰川 - 海洋界面观测值提供了引人注目的概念，这是一个众所周知的设备和人员库库的环境。在陆地上包含宽带仪器，海底的地震仪以及船上的电导率，温度和深度（CTD）铸件将提供重要的基准测试，以针对DTS/DAS的测量值。该项目将支持两位早期研究人员，一个博士后和一名本科，在华盛顿大学主持夏季研究计划。与当地的格陵兰教师培训者合作，该研究的科学结果及其对当地社区的影响将在格陵兰教室中传播。该奖项反映了NSF的法定任务，并通过使用基金会的知识分子优点和更广泛的影响评估标准来评估值得支持。