Further Development of the Eddy Correlation Technique

我。Berg, Peter （UVA）提案#:0536431项目名称：涡旋相关技术的进一步发展项目摘要：沉积物-水体O2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发展涡流相关技术来提高测量氧气的能力。这一发展将提高该技术对一般用户的可及性，并有可能在ORION和NEON等天文台系统中长期部署涡旋相关技术。在第二阶段，该技术将用于研究沉积物-水界面上O2的运输、消耗和产生的复杂动态性质。该技术在海洋系统中的许多应用都优于传统方法，因为它没有对沉积物的干扰，在自然水动力和光照条件下进行，并且可以专门用于传统方法无法实现的高渗透性或植被沉积物。对该技术的浓厚兴趣目前受到阻碍，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。该项目将发展涡流相关技术，使仪器可以用现成的组件构建。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和估计其他关键参数，如沉积物表面积的大小，这有助于O2通量和与底栖边界层中O2运输相关的湍流特性。目前用于涡流相关测量的克拉克型O2传感器本身就很脆弱，禁止在ORION和NEON等天文台系统中使用该技术。出于这个原因，一个更强大的光学O2传感器将被测试。研究地点将包括细粒粘性和沙质渗透性沉积物

.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