Initial development of a compact in-situ sensor for measuring the 13C isotope ratio of DIC in the ocean

初步开发紧凑型原位传感器，用于测量海洋中 DIC 的 13C 同位素比

• 批准号: 2219885
• 负责人: Anna Michel
• 金额: $ 60.83万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-12-15 至 2024-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2219885&HistoricalAwards=false
• 关键词: Initial; development; compact; situ; sensor

The ability to measure the carbon-13 isotope ratio of dissolved inorganic carbon in the ocean could contribute to studies on carbon dioxide uptake by phytoplankton, the ocean’s uptake of anthropogenic carbon dioxide, the biogeochemistry of hydrothermal systems on the seafloor, and climate research. Applications of such a sensor exist in the laboratory and field, and in locations ranging from coastal waters to the deep ocean. This sensor will enable an improved understanding of the global carbon cycle and biogeochemical processes. This sensor will lay the foundation for developing in situ isotope sensors that can target other gases and will have impact on sensors for other fields (for example, planetary ocean exploration, biomedical applications and industrial applications). To further broaden participation in ocean science, technology, and engineering fields, high school and undergraduate students will be mentored through research opportunities in the laboratory. Through established programs undergraduate students will be brought into the lab for summer research experiences. Through established connections with local schools, high school students will be mentored on research projects. The PIs will develop a hollow core fiber-based sensing approach for the in situ analysis of dissolved inorganic carbon. This sensing approach will rely on absorption spectroscopy in hollow core optical fibers and will have application to dissolved-phase gas sensing. Utilizing the core design of a recently developed sensor for in situ methane detection, that was demonstrated at depths of up to 2000 m, hollow core fibers will be used for isotope analysis in the laboratory, a key first step towards developing an in situ system. Utilization of the hollow core fiber approach, will enable sensors to be made smaller, due to the inherent minute nature of the fibers. The development of smaller sensors will enable additional platforms to be used for deployments in the future.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

测量海洋中溶解无机碳的碳-13同位素比率的能力有助于浮游植物吸收二氧化碳、海洋吸收人为二氧化碳、海底热液系统的地球化学和气候研究。这种传感器的应用存在于实验室和现场，以及从沿海沃茨到深海的位置。该传感器将有助于更好地了解全球碳循环和地球化学过程。该传感器将为开发能够以其他气体为目标的原位同位素传感器奠定基础，并将对其他领域的传感器产生影响（例如，行星海洋勘探、生物医学应用和工业应用）。为了进一步扩大对海洋科学，技术和工程领域的参与，高中和本科生将通过实验室的研究机会得到指导。通过既定的计划，本科生将被带入实验室进行夏季研究体验。通过与当地学校建立联系，高中生将在研究项目上得到指导。PI将开发一种基于空芯光纤的传感方法，用于溶解无机碳的原位分析。这种传感方法将依赖于空芯光纤中的吸收光谱，并将应用于溶解相气体传感。利用最近开发的用于现场甲烷探测的传感器的芯设计，该传感器在最深达2 000米的深度进行了演示，空芯光纤将用于实验室的同位素分析，这是朝着开发现场系统迈出的关键的第一步。由于光纤固有的微小特性，利用空芯光纤方法将使传感器变得更小。更小的传感器的开发将使更多的平台用于未来的部署。该奖项反映了NSF的法定使命，并已被认为是值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估的支持。