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

I.Berg，Peter(UVA)提案#：0536431项目标题：进一步发展涡旋相关技术项目摘要O2的沉积物-水交换是海洋系统生物地球化学研究中的一个关键参数。该项目的第一阶段将通过进一步发展涡旋相关技术来提高测量氧气的能力。这一进展将提高该技术对一般用户的可及性，并增加在猎户座和霓虹灯等观测站系统中长期部署涡旋相关技术的可能性。在第二阶段，这项技术将被用来研究沉积物-水界面O2的运输、消耗和产生的复杂动力学性质。这项技术在海洋系统中的许多应用中都优于传统方法，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，它可以专门用于传统方法无法解决的高渗透性或植被覆盖的沉积物。目前对该技术的浓厚兴趣受到了阻碍，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。该项目将把涡旋相关技术发展到可以用现成的部件建造仪器的阶段。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，如对O2通量有贡献的沉积物表面积的大小以及与海底边界层中O2输送有关的湍流特性。今天用于涡旋相关测量的克拉克型氧气传感器天生就很脆弱，无法在猎户座和霓虹灯等观测站系统中使用这项技术。出于这个原因，将测试更坚固的光学O2传感器。研究地点将包括细粒粘性和砂质渗透性沉积物。