Optical monitoring of ocean temperature over scales 10m to 10 km

现在可以使用光纤技术在数十公里范围内准连续地监测温度或应变等参数。这些基于光纤的系统已经由石油工业开发，用于监测海底管道的流量和结构完整性。这种方法是通过光纤传输高功率激光。通过布里渊散射过程，发射信号的一小部分被反射回来。这种散射光的光学频率与透射光的光学频率的差异与温度成比例。PI已经要求EAGER奖来量化布里渊系统？的性能，并评估该技术的潜在作用，以测量精确的温度在海洋监测中使用它在几个示范实验。更广泛的影响：布里渊散射技术在海洋学的所有领域有巨大的潜在应用范围。沿着一个活跃的扩张中心的轴线铺设一根光纤，可以监测到温暖的流体沿着裂缝的时空注入。水道一侧等温线相对于另一侧等温线的高程偏移可以用来推断通过水道的真实的地转流。漂浮在热带海面上的纤维可以监测零星的降雨（寒冷）和每日的加热和冷却循环。

It is now possible to monitor parameters such as temperature or strain quasi-continuously over many tens of kilometers using optical fiber technology. These fiber based systems have been developed by the oil industry to monitor the flow and the structural integrity of undersea pipelines. The approach is to transmit high-power laser light down an optical fiber. A small fraction of the transmitted signal is reflected back by the Brilloiun scattering process. The optical frequency of this scattered light differs from the transmitted light by an amount proportional to temperature. The PI's have requested an EAGER award to quantify the Brillouin system?s performance and to evaluate the potential role of this technology to measure precise temperature in ocean monitoring by using it in several demonstrational experiments.Broader Impact: The Brillouin scatter technology has a huge range of potential applications across all fields of oceanography. A fiber laid down the axis of an active spreading center can monitor the space-time injection of warm fluid along the rift. The elevation offset between isotherms on one side of a channel relative to the other can be used to infer the geostrophic flow through the channel, in real time. A fiber floating on the tropical sea surface can monitor the patchy fall of rain (cold) and the daily cycle of heating and cooling.