COLLABORATIVE RESEARCH: Application of Distributed Temperature Sensors (DTS) for Antarctic Ice Shelves and Cavities

合作研究：分布式温度传感器（DTS）在南极冰架和冰洞中的应用

• 批准号: 1043154
• 负责人: Scott Tyler
• 金额: $ 12.36万
• 依托单位: Board of Regents, NSHE, obo University of Nevada, Reno
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-06-15 至 2014-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1043154&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Application; Distributed; Temperature

AbstractResearchers will explore the use of a distributed temperature sensing monitoring system (DTS), using fiber-optical (FO) technology, as the basis of a sustainable, sub-ice cavity sensing array. FO cable systems, such as may be deployed through a hot-water drilled hole through an ice shelf, passing through the underlying cavity to the sea floor, are capable of measuring temperatures down fiber at 1 meter intervals, and at time frequencies as high as 15 seconds. DTS FO systems operate via optical time domain reflectometry along the fiber waveguide using inelastic backscatter of coherent laser light as a probe beam in the FO environment.The introduction of new technologies to the harsh environmental conditions of the Antarctic are often associated with high risk. However, the potential rewards of this approach (e.g. multiyear capability, minimal submerged mechanical or electrical components that may fail, relative simplicity of deployment and measurement principle, yet yielding distributed real time and spatial observation) are attractive enough to conduct a pilot project at a field-ready location (McMurdo). Current indications are that the instability of some of the world's largest ice sheets located around the Antarctic and Greenland may be caused by the presence of warming, deep ocean waters, shoaling over continental shelves, and melting the underside of floating ice shelves. Additional knowledge of the temporal and spatial variability of the temperature fields underneath terminal ice shelves, such as those draining the West Antarctic Ice Sheet, are needed to accurately project future global climate effects on ice-shelf ocean interactions, and in order to inform societal and technological aspects of adaption to changing sea-level.

Abstractresearcher将探讨使用光纤光学（FO）技术的分布式温度传感监测系统（DTS）的使用，作为可持续的，亚冰的腔传感阵列的基础。 FO电缆系统，例如可以通过冰架通过热水钻孔部署，穿过下面的腔到海底，能够以1米的间隔和高达15秒钟的时间频率以1米的间隔测量纤维的温度。 DTS FO系统通过光学时域反射测量法在FO环境中使用相干激光的非弹性反向散射作为探针光束进行操作。将新技术引入南极的恶劣环境条件通常与高风险相关。但是，这种方法的潜在回报（例如，多年能力，最小的淹没机械或电气组件可能失败，部署和测量原理的相对简单性，但实时分布式的实时和空间观察）足以吸引足够有吸引力，足以在现场准备就绪的位置（McMurdo）进行飞行员项目。目前的迹象表明，位于南极和格陵兰周围一些世界上一些最大的冰盖的不稳定可能是由于存在变暖，深海水，铺在大陆架上的浅滩以及融化浮冰架的底面而引起的。需要对终端冰架下温度场的时间和空间变异性的更多了解，例如排干南极冰盖的温度场，以准确地投射出未来的全球气候对冰壳海洋相互作用的影响，以便为适应的社会和技术方面提供适应性变化的社会和技术方面的影响。