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，利用高科技测量来了解流入海洋的格陵兰冰川在冬季和夏季之间的变化，研究人员正在重点关注冰与海洋的交汇点，并使用特殊的传感器测量振动和温度。研究人员的目的是测量冰山从冰川分离并落入海洋的位置和时间。研究人员还想找出温暖的海水在哪里融化冰，以及是否与冰川流动的速度有关。与当地格陵兰见习教师合作，这些测量将帮助我们更多地了解格陵兰岛的冰川未来将如何变化，以及这对世界各地的海平面意味着什么。对当地社区的影响将在格陵兰岛的课堂上传播。该提案旨在检验以下假设：融化源地区在春夏季过渡期间发生政权变化，从温度主导的融化和崩解转变为为了验证这一假设，研究人员将在格陵兰岛 Qajuuttap Sermia 潮水冰川的崩解前沿部署一台新的光纤仪器，该仪器将测量声学和温度数据，以更好地了解冰下放电的影响。 -冰川融化和崩解时的排放，该项目将通过分布式温度传感（DTS）和分布式声学传感（DAS）系统产生新颖的测量结果，从而形成引人注目的结果。冰川-海洋界面观测的概念验证，这是一个对设备和人员来说非常危险的环境，其中包括陆地上的宽带仪器、海底的地震仪以及船上的电导率、温度和深度 (CTD) 模型。将为 DTS/DAS 的测量提供重要基准 该项目将支持华盛顿大学主办的夏季研究项目的两名早期职业研究人员、一名博士后和一名本科生。作为见习教师，研究的科学结果及其对当地社区的影响将在格陵兰岛的课堂上传播。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。