Evaluation of optical fiber Distributed Temperature Sensors (DTS) as a tool to constrain heat and mass transport between sediments and the overlying water column

评估光纤分布式温度传感器 (DTS) 作为限制沉积物与上覆水柱之间热量和质量传输的工具

• 批准号: 0734033
• 负责人: Anne Tréhu
• 金额: $ 2万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-05-15 至 2008-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0734033&HistoricalAwards=false
• 关键词: Evaluation; optical; fiber; Distributed; Temperature

The PIs have requested a Small Grant for Exploratory Research (SGER) to evaluate optical fiber Distributed Temperature Sensors (DTS) as a tool to constrain heat and mass transport between sediments and the overlying water column. DTS systems using optical fibers represent a new technology with great promise for providing measurements of temperature on and beneath the seafloor that are dense in both space and time. The PIs request funds to build, calibrate and test this technology in an environment that is similar to, but much more accessible than, the seafloor. The PIs propose to piggy-back on an onshore experiment, funded by the NSF hydrology program, which will use a variety of tools, including HOBO temperature probes, to study the heat budget of hyporheic (subsurface) flow in the Willamette River. The fundamental objective of the hydrology project - to constrain models of heat and mass transfer between the sediment and overlying water - has parallels to studies of fluid flow associated with submarine cold seeps. The PIs plan to capitalize on the experience of co-PI Selker, who has recently returned from a sabbatical focused on exploring use of DTS in hydrology. Because densely-spaced temperature time-series are needed to achieve a number of the science objectives of the Regional Cabled Observatory and the Coastal Observatory, this is an excellent opportunity to test and calibrate a very promising technology for OOI at a fraction of the cost for a marine test. Broader ImpactsThis project represents a first step towards adaptation of a new and promising technology to the marine environment. It will also result in training of a graduate student and several undergraduates and faculty, several of whom represent minorities underrepresented in science, in these new techniques.

PI已要求提供探索性研究（SGER）的小赠款，以评估光纤分布温度传感器（DTS），以限制沉积物和上覆水柱之间的热量和质量传输的工具。使用光纤的DTS系统代表了一项新技术，具有巨大的希望，可在海底和海底下的温度测量，在时空和时间上都很稠密。 PIS请求资金在与海底相似但更容易接近的环境中建造，校准和测试这项技术。 PI提议在由NSF水文学计划资助的陆上实验中进行养猪，该计划将使用包括Hobo温度探针在内的各种工具来研究Willamette河中低潮（地下）流量的热预算。水文学项目的基本目标 - 限制沉积物和上覆水之间的热量和质量转移模型 - 与与海底冷渗水相关的流体流量的研究相似。 PIS计划利用Co-Pi Selker的经验，后者最近从休假中回来，重点是探索DTS在水文学中的使用。由于需要密集的温度时间序列来实现区域有线天文台和沿海天文台的许多科学目标，因此这是一个非常有希望的OOI技术的绝佳机会，以海上测试的一小部分成本进行OOI。更广泛的影响力是朝着适应新的和有前途的技术对海洋环境适应的第一步。这也将导致对研究生以及几位大学生和教职员工的培训，其中一些人代表了这些新技术的少数群体。