Autonomous Ocean Flux Buoys For Polar Studies

[00:84858 . stanton]该项目将开发两个自主漂流浮标，能够测量冰雪覆盖的极地海洋上层的垂直热通量、盐通量和动量。低功率传感器技术的最新进展使研制能够直接测量海洋通量的冰部署浮标成为可能，并使对冰-海洋-大气耦合系统进行区域研究成为可能。这两种仪器中的一种将在弱分层的海洋混合层内使用涡动相关法测量通量。与声学多普勒电流剖面仪集成的通量探头将允许估计湍流耗散率。内部微功率计算机将处理和分析数据流，并保存结果信息，以便上行至低轨道卫星。通过卫星链路的双向通信将促进诊断操作模式，这对长期（15个月）远程仪器系统至关重要。这两个仪器中的第二个将使用温跃层内的耗散法测量热通量。剖面仪器包将包含双微热敏电阻，它可以将温度梯度谱分解到耗散尺度，即使在极地海洋混合层底部的强烈分层斜斜中也是如此

0084858Stanton This project will develop two autonomous drifting buoys capable of measuring vertical fluxes of heat, salt, and momentum in the upper layers of an ice-covered polar ocean. Recent advances in low powered sensor technology has made possible the development of ice-deployed buoys capable of measuring oceanic fluxes directly, and make possible regional studies of the coupled ice-ocean-atmosphere system. One of these two instruments will measure fluxes using an eddy correlation method within the weakly stratified oceanic mixed layer. A flux probe integrated with an acoustic doppler current profiler will allow the estimation of turbulent dissipation rates. Internal micro-power computers will process and analyze the data streams and hold the resulting information for uplink to low orbit satellites. Two-way communication through the satellite link will facilitate diagnostic modes of operation, which are critical for long term (15 months) remote instrument systems. The second of the two instruments will measure heat fluxes using a dissipation method within the thermocline. A profiling instrument package will contain dual microthermistors which can resolve the temperature gradient spectrum to dissipation scales, even in the strongly stratified pycnocline found at the base of the mixed layer in polar oceans.***