Collaborative Research: Facility Support: Center for Transformative Environmental Monitoring Programs: Fiber-Optic Distributed Sensing

1129003 SELKER俄勒冈州立大学(PI：SELKER)和内华达大学雷诺分校(PI：TYLER；EAR-1128999)之间的这笔合作赠款，支持为变革性环境监测计划中心(CTEMP)提供为期三年的国家多用户设施支持。CTEMP成立于2009年，最初是通过《美国复苏和再投资法案》(ARRA；EAR-0943682)提供支持的。CTEMPs利用分布式光纤方法，包括拉曼背向散射分布式温度传感(DTS)，为规划、培训、设备租赁和实地实施提供社区支持，以便能够前所未有地观测温度的时空分布，用于环境应用，包括但不限于雪、地下水和流域水文学、水生和陆地生态学、岩溶地质学、土壤科学(包括永冻土研究)、大气边界层湍流和冰川学。使用CTEMPs DTS系统收集的数据将被整合到CUAHSI水文信息系统(HIS)中，CTEMPs将成为CUAHSI的一个水文测量设施(HMF)节点。在这方面的支持下，CTEMPs计划每年为多达26个研究项目举办培训讲习班和实地部署。CTEMPs目前维护着5个DTS系统，其中一个是高分辨率的，以及27公里的光缆。高分辨率的DTS系统可以在8公里的高时间频率(1赫兹)下对河底、湖泊或河口底部、积雪、土层或大气温度进行近连续(0.25米)和精确(+/-0.3℃)的观测。当每小时采样时，温度精度可达到+/0.01℃。当放置在小溪或河流中时，光纤DTS可以观察每一次地下水流入的位置、温度和流量，计算准确的热量平衡以确定潜水交换，并观察对成功招募幼鱼至关重要的微温生境。DTS系统最初是为石油工业和高层建筑的火灾探测应用而开发的。对CTEMP的支持将使更广泛的科学界能够获得这项正在开发的技术，以获得边际仪器租赁成本，仪器使用的应用将由一个有外部代表的咨询委员会优先考虑。*

1129003SelkerThis collaborative grant between Oregon State University (PI: Selker) and the University of Nevada Reno (PI: Tyler; EAR-1128999), supports a three year continuation and enhancement of national multi-user facility support for the Center for Transformative Environmental Monitoring Programs (CTEMPs). CTEMPs was established in 2009 with initial support through the American Recovery and Reinvestment Act (ARRA; EAR-0943682). CTEMPs offers community support for planning, training, equipment lease and field implementation using distributed fiber optic methods including Raman backscatter Distributed Temperature Sensing (DTS) to allow for unprecedented observation of the spatial and temporal distribution of temperature for environmental applications including but not limited to, snow, groundwater and watershed hydrology, aquatic and terrestrial ecology, karst geology, soil science (including permafrost studies), atmospheric boundary layer turbulence and glaciology. Data collected using the CTEMPs DTS systems will be integrated into the CUAHSI Hydrologic Information System (HIS) and CTEMPs will become a Hydrologic Measurement Facility (HMF) Node of CUAHSI. CTEMPs plans training workshops and field deployment for up to 26 research projects a year with this support. CTEMPs currently maintains five DTS system, one of which is high resolution, and 27 km of fiber optic cable. High resolution DTS systems allow for near continuous (0.25 m) and precise (+/- 0.3 deg C) observations of river bottom, lake, or estuary bottom, snow pack, soil horizon or atmospheric temperatures over distances as great at 8 km at high temporal frequency (1 Hz). Temperature precision of +/ 0.01 deg C can be achieved when observation are sampled hourly. When placed in a stream or river, fiber optic DTS allows for observation of the location, temperature, and flux of each groundwater inflow, calculation of an exact heat budget to determine hyporheic exchange, and observation of micro-thermal habitats critical to successful larval fish recruitment. DTS systems were originally developed for applications in the oil industry and for fire detection in high rise buildings. Support for CTEMPs will make this developing technology available to broader scientific community for marginal instrument lease costs and applications for instrument use will be prioritized by an advisory committee with external representation.***