Collaborative Research: EAGER: Expedited Measurement of Englacial Temperatures by Means of Melt-Probe-Deployed Distributed Temperature Sensing

合作研究：EAGER：通过熔体探针部署的分布式温度传感快速测量冰川温度

• 批准号: 2243606
• 负责人: Dale Winebrenner
• 金额: $ 24.04万
• 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: 2022
• 资助国家: 美国
• 起止时间: 2022-12-15 至 2024-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2243606&HistoricalAwards=false
• 关键词: Collaborative; Research; EAGER; Expedited; Measurement

Knowledge of basal temperatures and geothermal fluxes underneath the Greenland and Antarctic ice sheets is key to modeling ice-sheet flow, to finding locations where climate records are preserved, and in general to better understand subglacial conditions that influence ice-sheet evolution. Yet such information has been difficult to acquire and there exist limited basal temperature and geothermal flux measurements from a few, isolated locations. This project will develop and test a new measurement capability that would couple unreinforced single-mode optical fiber with melt probe technology. The project aims to develop and test a capability that would greatly expand the number and distribution of temperature and flux observations from ice sheets. An immediate goal is to enhance the measurement capabilities of probes to be used by the Center for Oldest Ice Exploration (COLDEX) Science and Technology Center.The team will augment the capability of melt probes that are presently being built for COLDEX to deploy optical dust-loggers to depths up to 3000 m in Greenland and East Antarctica. The team will add to each probe 3000 m of single-mode optical fiber to unspool as the probe descends. Distributed Temperature Sensing at the deployment site will be realized with minimal additional surface equipment and a single additional field team member.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.

了解格陵兰岛和南极冰盖下方的基础温度和地热通量对于模拟冰盖流动、寻找保存气候记录的位置以及更好地了解影响冰盖演化的冰下条件至关重要。然而，此类信息很难获取，并且来自少数孤立地点的基础温度和地热通量测量结果有限。该项目将开发和测试一种新的测量功能，将非增强型单模光纤与熔体探针技术结合起来。 该项目旨在开发和测试一种能力，该能力将极大地扩大冰盖温度和通量观测的数量和分布。 近期目标是增强最古老冰层探索中心 (COLDEX) 科学技术中心使用的探测器的测量能力。该团队将增强目前为 COLDEX 建造的熔体探测器的能力，以部署光学尘埃-格陵兰岛和东南极洲的伐木工可深入 3000 米深处。该团队将在每个探测器上添加 3000 m 的单模光纤，以便在探测器下降时展开。部署地点的分布式温度传感将通过最少的额外地面设备和一名额外的现场团队成员来实现。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力优点和更广泛的影响审查标准进行评估，被认为值得支持。