In-Situ Chemical Sensors for Monitoring the Chemistry of Hydrothermal Vent Fluids at Mid-Ocean Ridges: Instrument Development and Field Applications

用于监测大洋中脊热液喷口流体化学成分的原位化学传感器：仪器开发和现场应用

• 批准号: 0525907
• 负责人: Kang Ding
• 金额: --
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-10-01 至 2010-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0525907&HistoricalAwards=false
• 关键词: Situ; Chemical; Sensors; Monitoring; Chemistry

Abstract: Ding (0525907)Intellectual Merit: The ability to measure and monitor changes in the chemistry of waters from extreme environments is a major technological and scientific challenge. This research continues an ongoing effort to develop, calibrate, test, and deploy in situ electrochemical sensors for pH, temperature, and important Hydrogen and sulfur-bearing redox compounds, with the goal of producing an instrument package that can be used for long term monitoring of hydrothermal vent chemistry at mid-ocean ridges. Prototype testing of the instrument has been successful and measured, in real time, the in situ pH and H2 and H2S concentrations of waters emanating from high and low temperature, diffuse-flow vents. This work will extend the monitoring capabilities of the sensor array and increase its physical robustness for long-term deployment on the seafloor. Field test sites will be high temperature and low temperature diffuse flow vents on the East Pacific Rise and low temperature vents at Lost City or the Rainbow site on the Mid Atlantic Ridge. Long-term lab testing of the material properties of the sensors will be carried out for the solid-state pH sensor and results will be disseminated widely to build a user base. Specific project goals include in-situ computer controlled calibration of the present high temperature sensor package and the development of a solid-state pH sensor, which is better suited for long-term use in high pH and biologically active hydrothermal vent areas. The first year of the program will be devoted to technical upgrades of the present chemical sensor system. Field deployments and testing of the sensor packages will take place in years two and three at the EPR 9N and MAR hydrothermal sites using submersibles and/or ROVs.Broader Impacts: This work funds researchers and students at the University of Minnesota. Broader impacts consist of new sensor/tool development and application of the tools in environments previously too hostile, in terms of temperature, pressure, corrosive chemistry and/or biofouling, to be sampled and measured in-situ. As such, this work enhances research infrastructure available to the ocean sciences community, especially with regard to making crucial time series measurements of inherently dynamical processes linked to energy and mass transfer at mid-ocean ridges.

摘要：丁（0525907）智力优点：从极端环境中测量和监测水域化学变化的能力是一项主要的技术和科学挑战。 这项研究继续进行持续的努力，以开发，校准，测试和部署用于pH，温度以及重要的氢和含硫的氧化还原化合物的现场电化学传感器，其目的是生产一种可以用于长期监测中元脊的水热化学的仪器包装。 该仪器的原型测试已经成功并实时测量了原位pH，H2和H2S的浓度，这些水是从高温和低温，散射流动口发出的水。 这项工作将扩展传感器阵列的监视能力，并增加其在海底长期部署的身体鲁棒性。 现场测试地点将是东太平洋上升的高温和低温弥漫流动口，在失落的城市或中大西洋山脊上的彩虹地点处于低温和低温通风孔。 将针对固态pH传感器对传感器的材料特性进行长期实验室测试，并将广泛传播结果以构建用户群。 特定的项目目标包括当前高温传感器包装的原位计算机控制的校准以及固态pH传感器的开发，该传感器更适合于高pH值和生物活性活性的热液排气区域。该计划的第一年将致力于对本化学传感器系统的技术升级。 传感器包的现场部署和测试将在EPR 9N和MAR水热站点的第二年和/或ROVS.BOOVS.BOADER的影响下进行：这项工作为明尼苏达大学的研究人员和学生提供资金。 更广泛的影响包括新的传感器/工具开发和工具在以前的环境中的应用，在温度，压力，腐蚀性化学和/或生物污染的方面，要进行采样和测量。 因此，这项工作增强了海洋科学社区可用的研究基础设施，尤其是在进行与中山脊相关的固有动力学过程的关键时间序列测量方面。