Further Development of the Eddy Correlation Technique

涡相关技术的进一步发展

• 批准号: 0536431
• 负责人: Peter Berg
• 金额: $ 61.9万
• 依托单位: University of Virginia Main Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-01-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0536431&HistoricalAwards=false
• 关键词: Further; Development; Eddy; Correlation; Technique

.I. Berg, Peter (UVA) Proposal #: 0536431PROJECT TITLE: Further development of the Eddy Correlation TechniqueProject SummarySediment-water exchange of O2 is a key parameter in biogeochemical studies of marine systems. The first phase of this project will improve the ability to measure O2 through further development of the eddy correlation technique. This development will enhance both the accessibility of the technique to users in general and the potential for long-term deployment of the eddy correlation technique in observatory systems like ORION and NEON. In the second phase, the technique will be used to study the complex dynamic nature of transport, consumption, and production of O2 at the sediment-water interface. This technique is superior to traditional methods for many applications in marine systems as there is no disturbance of the sediment, it is conducted under natural hydrodynamic and light conditions, and it can be used specifically for highly permeable or vegetated sediments where traditional methods fail. The strong interest in this technique is currently hindered as the technique demands custom-made components and specialized programming of both sampling scheme and flux extraction algorithms. This project will develop the eddy correlation technology to a stage where the instrument can be built with off-the-shelf components. Furthermore, it includes production of user-friendly software for extracting fluxes from measured data and estimation of other key parameters such as the size of the sediment surface area that contributes to the O2 flux and turbulent properties related to the O2 transport in the benthic boundary layer. The Clark-type O2 sensor used in eddy correlation measurements today is inherently fragile and prohibits the use of the technique in observatory systems such as ORION and NEON. For that reason, a more robust optical O2 sensor will be tested. Study sites will include fine-grained cohesive and sandy permeable sediments

。我。 Berg, Peter (UVA) 提案编号：0536431 项目名称：涡相关技术的进一步发展项目摘要 O2 的沉积物-水交换是海洋系统生物地球化学研究的关键参数。该项目的第一阶段将通过进一步开发涡流相关技术来提高测量 O2 的能力。这一发展将增强该技术对一般用户的可及性，以及在 ORION 和 NEON 等观测系统中长期部署涡流相关技术的潜力。在第二阶段，该技术将用于研究沉积物-水界面处氧气的传输、消耗和产生的复杂动态性质。该技术在海洋系统的许多应用中优于传统方法，因为它不会干扰沉积物，它是在自然水动力和光照条件下进行的，并且可以专门用于传统方法无法解决的高渗透性或植被沉积物。目前对该技术的强烈兴趣受到阻碍，因为该技术需要定制组件以及采样方案和通量提取算法的专门编程。该项目将把涡流相关技术发展到可以使用现成组件构建仪器的阶段。此外，它还包括制作用户友好的软件，用于从测量数据中提取通量并估计其他关键参数，例如有助于 O2 通量的沉积物表面积的大小以及与底栖边界层中 O2 传输相关的湍流特性。目前用于涡流相关测量的克拉克型 O2 传感器本质上很脆弱，因此禁止在 ORION 和 NEON 等观测系统中使用该技术。因此，将测试更强大的光学 O2 传感器。研究地点将包括细粒粘性和沙质渗透性沉积物