SGER: Proposed Proof-of-Concept Measurements of Turbulent Buoyancy Flux Using the Mast

SGER：建议使用桅杆进行湍流浮力通量的概念验证测量

• 批准号: 0729547
• 负责人: Wayne Geyer
• 金额: $ 6.6万
• 依托单位: Woods Hole Oceanographic Institution
• 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: 2007-05-01 至 2009-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0729547&HistoricalAwards=false
• 关键词: SGER; Proposed; Proof; Concept; Measurements

Intellectual Merit: This project is a one-year study to measure turbulent buoyancy flux with an instrumented mast. These measurements will test whether it is possible to quantify turbulent buoyancy flux in energetic and highly stratified coastal environments. The study will be conducted in conjunction with an ongoing study in the Merrimack estuary and in the adjacent waters of the Gulf of Maine. In both areas the stratification is high and a control-volume approach has shown that the buoyancy flux is orders of magnitude greater than in almost any other oceanographic regime. The mast system will add direct estimates of buoyancy flux as well as measurements of stress and estimates of dissipation.There are risks associated with the physical implementation of the measurements and in the processing of the data. Surface waves affect operations in part because the heavy 10-meter mast changes how the vessel responds. In addition, the interference of the mast mostion and the wave motion may mask the signal of the turbulent motions. However, if this project is successful, this could provide a significant breakthrough in quantifying mixing in the coastal and estuarine ocean. Broader Impacts: This study will contribute to our understanding of mixing in the coastal ocean, which has implications for the transport and dispersal of pollutants as well as biogeochemical materials. In addition, this study will assist the ongoing field work of a new PI.

学术成就：本计画是一项为期一年的研究，以测量湍流浮力通量与仪器桅杆。这些测量将测试是否有可能量化充满活力和高度分层的沿海环境中的湍流浮力通量。这项研究将与正在梅里马克河口和缅因州湾邻近沃茨进行的研究一起进行。在这两个地区的分层是高的，控制体积的方法表明，浮力通量的数量级大于几乎任何其他海洋制度。桅杆系统将增加浮力通量的直接估计以及应力测量和耗散估计。测量的物理实施和数据处理存在相关风险。表面波影响操作的部分原因是沉重的10米桅杆改变了船只的反应方式。此外，桅杆运动与波浪运动的干扰可能会掩盖湍流运动的信号。然而，如果这个项目是成功的，这可能会提供一个重要的突破，在量化混合在沿海和河口海洋。更广泛的影响：这项研究将有助于我们了解在沿海海洋的混合，这对污染物的传输和扩散以及海洋地球化学物质的影响。此外，本研究将协助新PI正在进行的现场工作。