Autonomous Ocean Flux Buoys For Polar Studies

用于极地研究的自主海洋通量浮标

• 批准号: 0084858
• 负责人: Timothy Stanton
• 金额: $ 55.95万
• 依托单位: Naval Postgraduate School
• 依托单位国家: 美国
• 项目类别: Interagency Agreement
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-02-01 至 2006-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0084858&HistoricalAwards=false
• 关键词: Autonomous; Ocean; Flux; Buoys; Polar

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.***

Stanton该项目将开发两个自主漂流浮标，能够测量冰盖极地海洋上层热量、盐分和动量的垂直通量。低功率传感器技术的最新进展使开发能够直接测量海洋通量的冰布放浮标成为可能，并使对冰-海-气耦合系统的区域研究成为可能。这两台仪器中的一台将使用涡旋相关方法测量弱分层海洋混合层内的通量。一个集成了声学多普勒海流剖面仪的通量探头将允许估计湍流消散率。内部微动力计算机将处理和分析数据流，并保存结果信息，用于上行到低轨道卫星。通过卫星链路的双向通信将有助于诊断操作模式，这对长期(15个月)的远程仪器系统至关重要。两台仪器中的第二台将使用温跃层内的耗散法测量热通量。一个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为耗散尺度，即使在极地海洋混合层底部发现的强烈层化的跃层中也是如此。*