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

了解格陵兰和南极冰盖下的基础温度和地热通量，对于建立冰盖流动模型、寻找保存气候记录的地点，以及总体上更好地了解影响冰盖演变的冰下条件至关重要。然而，这类资料很难获得，而且只有少数孤立地点的基础温度和地热通量测量数据有限。该项目将开发和测试一种新的测量能力，将非增强单模光纤与熔融探针技术相结合。该项目旨在开发和测试一种能力，这种能力将大大扩大从冰盖上观测到的温度和通量的数量和分布。一个直接的目标是提高最古老冰探测中心（COLDEX）科学技术中心使用的探测器的测量能力。该小组将增强目前为COLDEX建造的熔体探测器的能力，将光学尘埃记录器部署到格陵兰岛和南极洲东部3000米深处。该团队将在每个探头上增加3000米的单模光纤，以便在探头下降时解开线轴。部署地点的分布式温度传感将以最少的额外地面设备和一名额外的现场团队成员实现。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。

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.